Notebookcheck

HP ProBook 645 G4 (Ryzen 5 Pro 2500U, SSD, FHD) Laptop Review

Sascha Mölck (translated by Stanislav Kokhanyuk), 08/31/2018

Up in the air. The ProBook 645 G4 comes with a powerful AMD APU, good input devices and a fast NVMe SSD. Despite its 900 to1000-Euro (~$1051 to $1167) price tag, the device is not free of flaws: The notebook has poor battery life and a dim display with a poor contrast ratio.

HP ProBook 645 G4 3UP62EA
Graphics adapter
AMD Radeon RX Vega 8 - 1024 MB, Core: 1100 MHz, Single-Channel, 23.20.826.5120
Memory
8192 MB 
, DDR-2400, Single-Channel, two RAM slot (one occuppied)
Display
14 inch 16:9, 1920 x 1080 pixel 157 PPI, Innolux N140HCA-EAB, IPS, glossy: no
Mainboard
AMD CZ FCH
Storage
Toshiba XG5 KXG50ZNV256G, 256 GB 
, 182 GB free
Soundcard
Conexant CX8200 @ AMD K17.1 - Audio Processor - High Definition Audio Controller
Connections
4 USB 3.0 / 3.1 Gen1, 1 VGA, 1 HDMI, 1 DisplayPort, 1 Kensington Lock, 1 Docking Station Port, Audio Connections: 3.5-mm audio jack , Card Reader: MicroSD, 1 SmartCard, 1 Fingerprint Reader, Brightness Sensor, TPM 2.0
Networking
Realtek RTL8168/8111 Gigabit-LAN (10/100/1000MBit), Realtek RTL8822BE Wireless LAN 802.11ac PCIe Adapter (a/b/g/n/ac), Bluetooth 4.2
Size
height x width x depth (in mm): 20.9 x 340 x 240 ( = 0.82 x 13.39 x 9.45 in)
Battery
48 Wh, 4212 mAh Lithium-Ion, 11.4 V
Operating System
Microsoft Windows 10 Pro 64 Bit
Camera
Webcam: HD
Primary Camera: 0.9 MPix
Additional features
Speakers: Stereo, Keyboard: Chiclet-style, Keyboard Light: no, Windows 10 Pro DVD, MS Office 365 (trial version), 12 Months Warranty
Weight
1.73 kg ( = 61.02 oz / 3.81 pounds), Power Supply: 291 g ( = 10.26 oz / 0.64 pounds)
Price
929 EUro

 

Case – All plastic, no metal

HP has completely resigned the case. When compared to the predecessor model (ProBook 640/645 G3), the ProBook 645 G4 looks somewhat more angular. Moreover, the device is somewhat lighter and a few millimeters thinner. This has been achieved by forgoing the optical disk drive. There are changes in terms of the case materials: Whereas the G3 model had some metal elements (the upper size of the chassis), the G4 model is made entirely of plastic. With the exception of the display bezels (black), the notebook has a matte silver color. The ProBook does not feature a maintenance hatch. In order to reach the internals, the entire bottom cover will have to be removed.

The laptop does not evince any flaws in terms of the build quality. Everything is tight and tidy; nothing is protruding, all joints are flush with each other. When pressure is applied to the chassis, it slightly bends in below and to the left of the touchpad. In our opinion, the chassis could have been a little bit more rigid. A notebook in this price range should offer more in this respect. The display lid is even less rigid. Applying pressure to the display lid causes distortions on the screen - but only in the center. The hinges keep the display lid in place. However, the display lid wobbles slightly. The display lid can be opened with one hand. The maximum opening angle is 155 degrees.

The ProBook is very similar to the competing devices in terms of weight and dimensions.

Size Comparison

Connectivity – HP’s 14-incher offers a slot for an LTE modem

Because the ProBook 645 G4 does not feature an optical disc drive, there is now space for additional ports. All in all, the ProBook offers 4 USB 3.1 Gen 1 ports (3 type-A ports, 1 Type-C port). The Type-C port can function as a DisplayPort output (with the help of an adapter, which is sold separately). As a result, the dedicated DisplayPort output found in the G3 model has been replaced by an HDMI output in the G4. Therefore, the 645 G4 offers a total of three video outputs. Those who need more ports can get a docking station.

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Right side: 3 USB 3.1 Gen 1 ports (1x Type-C, 2x Type-A), HDMI-out, Gigabit Ethernet port, VGA-out, docking station port, SD card reader (MicroSD), power socket
Right side: 3 USB 3.1 Gen 1 ports (1x Type-C, 2x Type-A), HDMI-out, Gigabit Ethernet port, VGA-out, docking station port, SD card reader (MicroSD), power socket
Left side: Kensington Lock, USB 3.1 Gen 1 (Type-A) port, 3.5-mm combined audio jack, Smart Card reader
Left side: Kensington Lock, USB 3.1 Gen 1 (Type-A) port, 3.5-mm combined audio jack, Smart Card reader

SD Card reader

The SD card reader has seen some changes: While the G3 models of the ProBook had an SD card reader for full-size SD cards, the G4 models come with a MicroSD card reader. The SD card reader is one of the faster specimens of its kind. When copying large chunks of data, a maximum transfer speed of 85.6 MB/s was achieved. The transfer of 250 JPG image files was completed with a speed of 64.8 MB/s. The Dell Latitude E5490 shows that transfer rates can be higher. We test the SD card reader by means of a reference SD card (Toshiba Exceria Pro SDXC 64 GB UHS-II).

SDCardreader Transfer Speed
average JPG Copy Test (av. of 3 runs)
Dell Latitude 5490-TD70X
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
166.4 MB/s ∼100% +157%
Lenovo ThinkPad L480-20LS001AGE
  (Toshiba Exceria Pro M501 microSDXC 64GB)
71 MB/s ∼43% +10%
HP ProBook 640 G3 Z2W33ET
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
68.1 MB/s ∼41% +5%
HP ProBook 645 G4 3UP62EA
  (Toshiba Exceria Pro M501 microSDXC 64GB)
64.8 MB/s ∼39%
Average of class Office
  (10.2 - 191, n=224)
60.7 MB/s ∼36% -6%
Fujitsu Lifebook E548
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
60.5 MB/s ∼36% -7%
maximum AS SSD Seq Read Test (1GB)
Dell Latitude 5490-TD70X
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
208.2 MB/s ∼100% +143%
Lenovo ThinkPad L480-20LS001AGE
  (Toshiba Exceria Pro M501 microSDXC 64GB)
85.9 MB/s ∼41% 0%
HP ProBook 645 G4 3UP62EA
  (Toshiba Exceria Pro M501 microSDXC 64GB)
85.6 MB/s ∼41%
Average of class Office
  (9.5 - 255, n=201)
78.2 MB/s ∼38% -9%
Fujitsu Lifebook E548
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
76.1 MB/s ∼37% -11%
HP ProBook 640 G3 Z2W33ET
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
38.4 MB/s ∼18% -55%

Communication

The ProBook 645 G4 comes equipped with a Wi-Fi module from Realtek (RTL8822BE). Besides the Wi-Fi standards 802.11a/b/g/n, it also supports the fast Wireless-AC standard. The data transfer speeds that we have measured under the optimal conditions (no other Wi-Fi-enabled devices in close proximity, a short distance between the notebook and the server PC) are very good. A Gigabit Ethernet controller from Realtek’s RTL8168/8111 family is responsible for wired connections. An LTE modem can be easily installed in the ProBook 645 G4. A modem slot, antennas and a SIM card slot are provided.

An LTE modem can be installed after the purchase.
An LTE modem can be installed after the purchase.
The SIM card slot for Micro SIM cards.
The SIM card slot for Micro SIM cards.
Networking
iperf3 Client (receive) TCP 1 m 4M x10
HP ProBook 645 G4 3UP62EA
Realtek RTL8822BE Wireless LAN 802.11ac PCIe Adapter
636 MBit/s ∼100%
Dell Latitude 5490-TD70X
Intel 8265 Tri-Band WiFi (Oak Peak) Network Adapter
607 MBit/s ∼95% -5%
HP ProBook 640 G3 Z2W33ET
Intel Dual Band Wireless-AC 7265 (jseb)
543 MBit/s ∼85% -15%
Lenovo ThinkPad L480-20LS001AGE
Intel Dual Band Wireless-AC 8265
529 MBit/s ∼83% -17%
Fujitsu Lifebook E548
Intel 8265 Tri-Band WiFi (Oak Peak) Network Adapter
528 MBit/s ∼83% -17%
Average of class Office
  (5 - 688, n=164)
461 MBit/s ∼72% -28%
iperf3 Client (transmit) TCP 1 m 4M x10
Lenovo ThinkPad L480-20LS001AGE
Intel Dual Band Wireless-AC 8265
667 MBit/s ∼100% +9%
Fujitsu Lifebook E548
Intel 8265 Tri-Band WiFi (Oak Peak) Network Adapter
658 MBit/s ∼99% +7%
HP ProBook 645 G4 3UP62EA
Realtek RTL8822BE Wireless LAN 802.11ac PCIe Adapter
614 MBit/s ∼92%
HP ProBook 640 G3 Z2W33ET
Intel Dual Band Wireless-AC 7265 (jseb)
596 MBit/s ∼89% -3%
Dell Latitude 5490-TD70X
Intel 8265 Tri-Band WiFi (Oak Peak) Network Adapter
511 MBit/s ∼77% -17%
Average of class Office
  (34 - 688, n=164)
428 MBit/s ∼64% -30%

Security

The ProBook comes with a Trusted Platform Module (2.0). It also features a Smart Card reader and a fingerprint sensor. Moreover, HP has preinstalled its proprietary Client Security Software.

Webcam

The ProBook features a 0.9 MP web camera, which has a maximum resolution of 1280x720. The images look somewhat washed-out and noisy.

Accessories

The box contains a Quick Start Guide, advertising material and a Windows 10 Pro DVD.

Docking Station

The port selection of the notebook can be expanded with the help of a docking station. HP lists the HP 2013 Ultraslim (price: about 120 Euros/~$140) as a compatible docking station. This docking station has been on the market for a while now and is compatible with many other HP notebooks. Those who already have this dock can use it with the G4 without any problems.

HP 2013 Ultraslim
HP 2013 Ultraslim
HP 2013 Ultraslim
HP 2013 Ultraslim

Maintenance

The ProBook 645 G4 does not offer a maintenance hatch. In order to reach the internals, the entire bottom cover will have to be removed. For this, all the screws on the underside of the device will have to be undone. Subsequently, the bottom cover can be removed with the help of a plastic putty knife. The manual that comes with the 645 G4 recommends that you start in the area where the hinges are located. However, you cannot remove the bottom cover even after you have loosened it with a putty knife, because it is still connected to the chassis by a number of plastic tabs. Here, you are advised to start with the wrist rest area and work your way up. It is also a good idea to consult the user manual before proceeding with this procedure. Removing the bottom cover will allow you access to all of the hardware.

Warranty

HP provides the ProBook 645 G4 with a one-year warranty – including pick-up service. The warranty’s duration and extent can be further customized. HP offers additional warranty services through its Care Pack program. For instance, three years of on-site service can be had for 260 Euros ($303).

Input Devices – The keyboard of the 645 G4 impresses

Keyboard

The keyboard of the ProBook 645 G4 can be described as well-made. The rough keys have a short travel distance and put up quite a bit of resistance. Moreover, the keyboard also has a very precise actuation point. We do not often come across this level of precision. During typing, the center of the keyboard exhibits some slight flex. However, this does not prove to be annoying. All in all, HP delivers an “okay” keyboard that is suited for regular typing. Unfortunately, the keyboard lacks a backlight. In this price range and device class, a keyboard backlight is considered to be a standard feature. That being said, there is a ProBook version with a backlit keyboard.

Touchpad

The multitouch-enabled touchpad occupies an area of 11 x 6.5 centimeters (4.3 x 2.6 in). Therefore, there is enough space for the use of gesture controls. The smooth surface of the pad makes finger-gliding easy. The corners of the touchpad register inputs very well. The pad has a short travel distance and a clear actuation point.

Input devices
Input devices

Display – The HP laptop has a dim screen with a poor contrast ratio

The matte 14-inch display of the ProBook 645 G4 has a native resolution of 1920x1080. Both the contrast ratio (331:1) and the brightness (209.2 cd/m2) are way too low. Here we would expect to see values of at least 1000:1 and 300 cd/m2, respectively. In terms of display brightness, the competitors such as the Lenovo ThinkPad L480 and the Dell Latitude 5490 do not look any better.

Unfortunately, at 30% brightness and below, the screen exhibits PWM flickering with a frequency of 100 Hz. Such a low frequency can lead to headaches and/or eye strain amongst susceptible individuals.

Pixel arrangement
Pixel arrangement
Screen bleeding
Screen bleeding
219
cd/m²
209
cd/m²
207
cd/m²
209
cd/m²
225
cd/m²
202
cd/m²
200
cd/m²
211
cd/m²
201
cd/m²
Distribution of brightness
X-Rite i1Pro 2
Maximum: 225 cd/m² Average: 209.2 cd/m² Minimum: 12 cd/m²
Brightness Distribution: 89 %
Center on Battery: 209 cd/m²
Contrast: 331:1 (Black: 0.68 cd/m²)
ΔE Color 4.54 | 0.4-29.43 Ø6.3, calibrated: 2.87
ΔE Greyscale 4.14 | 0.64-98 Ø6.5
61% sRGB (Argyll 3D) 39% AdobeRGB 1998 (Argyll 3D)
Gamma: 2.13
HP ProBook 645 G4 3UP62EA
IPS, 1920x1080, 14
HP ProBook 640 G3 Z2W33ET
TN LED, 1920x1080, 14
Dell Latitude 5490-TD70X
IPS, 1920x1080, 14
Fujitsu Lifebook E548
IPS, 1920x1080, 14
Lenovo ThinkPad L480-20LS001AGE
IPS, 1920x1080, 14
Response Times
18%
-31%
8%
-74%
Response Time Grey 50% / Grey 80% *
33 (14, 19)
41 (19, 22)
-24%
46.9 (23.6, 23.3)
-42%
34 (18, 16)
-3%
73 (36, 37)
-121%
Response Time Black / White *
26 (16, 10)
30 (13, 17)
-15%
31.2 (18, 13.2)
-20%
21 (12, 9)
19%
33 (19, 14)
-27%
PWM Frequency
100 (30)
192 (90)
92%
Screen
-14%
12%
9%
40%
Brightness middle
225
343
52%
227
1%
278
24%
222
-1%
Brightness
209
332
59%
211
1%
240
15%
209
0%
Brightness Distribution
89
88
-1%
88
-1%
78
-12%
73
-18%
Black Level *
0.68
0.69
-1%
0.19
72%
0.27
60%
0.17
75%
Contrast
331
497
50%
1195
261%
1030
211%
1306
295%
Colorchecker DeltaE2000 *
4.54
9.06
-100%
5.6
-23%
5.57
-23%
3.91
14%
Colorchecker DeltaE2000 max. *
7.2
14.84
-106%
22.4
-211%
11.01
-53%
7.74
-8%
Colorchecker DeltaE2000 calibrated *
2.87
5.63
-96%
Greyscale DeltaE2000 *
4.14
9.87
-138%
2.4
42%
4.94
-19%
1.56
62%
Gamma
2.13 103%
2.5 88%
2.44 90%
2.6 85%
2.53 87%
CCT
6624 98%
11115 58%
6506 100%
7322 89%
6701 97%
Color Space (Percent of AdobeRGB 1998)
39
47
21%
34.5
-12%
37
-5%
35
-10%
Color Space (Percent of sRGB)
61
75
23%
54.4
-11%
58
-5%
55
-10%
Total Average (Program / Settings)
2% / -7%
-10% / 5%
9% / 9%
-17% / 21%

* ... smaller is better

Screen Flickering / PWM (Pulse-Width Modulation)

To dim the screen, some notebooks will simply cycle the backlight on and off in rapid succession - a method called Pulse Width Modulation (PWM) . This cycling frequency should ideally be undetectable to the human eye. If said frequency is too low, users with sensitive eyes may experience strain or headaches or even notice the flickering altogether.
Screen flickering / PWM detected 100 Hz ≤ 30 % brightness setting

The display backlight flickers at 100 Hz (Likely utilizing PWM) Flickering detected at a brightness setting of 30 % and below. There should be no flickering or PWM above this brightness setting.

The frequency of 100 Hz is very low, so the flickering may cause eyestrain and headaches after extended use.

In comparison: 53 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 8876 (minimum: 43 - maximum: 142900) Hz was measured.

Straight out of the box, the display provides a good color reproduction. With a DeltaE 2000 color deviation of 4.54, the ProBook 645 G4 is not too far from the ideal value (DeltaE less than 3). The display does exhibit a bluish cast. The color reproduction can be improved through calibration. After calibration, the DeltaE color deviation sinks to 2.87 and the grayscale looks more balanced. The display can cover neither the AdobeRGB color space nor the sRGB color space. It can cover just 39% of AdobeRGB and 61% of sRGB.

By means of our color profile, the color reproduction can be improved. However before downloading it, you should make sure that your laptop has the same display model (manufacturer + model number) as our review device, because otherwise our color profile can result in a worse color reproduction. Displays from different manufacturers can often be found within notebooks from the same model range.

CalMAN - ColorChecker
CalMAN - ColorChecker
CalMAN - Grayscale
CalMAN - Grayscale
CalMAN - Saturation
CalMAN - Saturation
CalMAN - ColorChecker (after calibration)
CalMAN - ColorChecker (after calibration)
CalMAN - Grayscale (after calibration)
CalMAN - Grayscale (after calibration)
CalMAN - Saturation (after calibration)
CalMAN - Saturation (after calibration)

Display Response Times

Display response times show how fast the screen is able to change from one color to the next. Slow response times can lead to afterimages and can cause moving objects to appear blurry (ghosting). Gamers of fast-paced 3D titles should pay special attention to fast response times.
       Response Time Black to White
26 ms ... rise ↗ and fall ↘ combined↗ 16 ms rise
↘ 10 ms fall
The screen shows relatively slow response rates in our tests and may be too slow for gamers.
In comparison, all tested devices range from 0.8 (minimum) to 240 (maximum) ms. » 46 % of all devices are better.
This means that the measured response time is similar to the average of all tested devices (25.7 ms).
       Response Time 50% Grey to 80% Grey
33 ms ... rise ↗ and fall ↘ combined↗ 14 ms rise
↘ 19 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.9 (minimum) to 636 (maximum) ms. » 20 % of all devices are better.
This means that the measured response time is better than the average of all tested devices (41.2 ms).

HP has equipped the laptop with an IPS panel with good viewing angles. Consequently, the display is legible from every position. Outdoors, the notebook can only be used when the sun does not shine too brightly because of the low screen brightness.

Note: The maximum brightness of the display decreases when the device is running on battery power. This can be attributed to AMD’s Vari-Bright feature. This feature is supposed to reduce energy consumption and therefore extend the battery life. This is why, the brightness of the display is adjusted according to the screen content. The Vari-Bright feature can be easily disabled. This can be done through Radeon Software.

The ProBook outside (shot in direct sunlight on a sunny day).
The ProBook outside (shot in direct sunlight on a sunny day).
The ProBook outside (shot in direct sunlight on a sunny day; the sun is behind the device).
The ProBook outside (shot in direct sunlight on a sunny day; the sun is behind the device).
Viewing angles
Viewing angles

Performance - Raven Ridge provides enough performance

With the ProBook 645 G4, HP has a 14-inch business notebook in its product range. It offers more than enough performance for all current applications. The ProBook 645 G4 comes with features that are typically associated with business notebooks such as a docking port and TPM. An LTE modem can be installed after the purchase. Our review device can be had for 900 to 1000 Euros ($1051 to 1167). Other hardware configurations are also available. Here, we are talking about the models from the ProBook 640 G4 product range that have Intel processors.

CPU-Z
CPU-Z
CPU-Z
CPU-Z
GPU-Z
HWInfo
LatencyMon
 

Processor

The ProBook 645 G4 is powered by a Ryzen 5 Pro 2500U (Raven Ridge) APU from AMD. This APU offers the same level of performance as the “standard” Ryzen 5 2500U. The “Pro” bit alludes to the fact that this is an APU for business devices. AMD guarantees a high stability and long-term availability of the APU. The AMD APU has four cores that run at a base clock rate of 2.0 GHz. Thanks to AMD’s Turbo Core technology, the CPU’s clock rate can be boosted up to 3.6 GHz. The processor also supports Simultaneous Multithreading, which means that each core can process two threads at the same time.

The CPU runs for a short time at 3.1 to 3.2 GHz in the multi-core section of the Cinebench R15 benchmark. Then, it throttles down to 2.8 to 2.9 GHz. In the single-core benchmarks, the processor operates at 1.6 to 3.6 GHz. In the single-core benchmarks, only two cores run at full speed. The clock rate of the remaining cores is reduced to 1.6 GHz. Things are different when running on battery power: In the multi-core benchmarks, the processor runs for a few seconds at 2.4 GHz. Then, the clock rate rises to 2.9 to 3 GHz. In the single-core benchmarks, the clock rate fluctuates between 1.6 and 2.4 GHz.

Single-core performance (when plugged in)
Single-core performance (when plugged in)
Multi-core performance (when plugged in)
Multi-core performance (when plugged in)

We check if the Turbo boost can be used over a prolonged period of time by running the Cinebench multi-core benchmark in a continuous loop for 30 minutes. The results drop by 15% from the first to the fourth benchmark run. After that, they stay on the same level. The CPU turbos to 2.5 GHz.

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Cinebench R15 CPU Multi 64 Bit
Clock speeds in the Cinebench R15 loop
Clock speeds in the Cinebench R15 loop

The Ryzen 5 Pro 2500U’s nemesis is the Intel Core i5-8250U. Both CPUs offer the same level of performance – this is confirmed by our benchmarks. Both processors cannot reach their full potential in the multi-core benchmarks, because they cannot maintain their Turbo Boost clocks. Here, the TDP and temperature constraints set by the laptop manufacturer are to blame. Moreover, both compact notebooks do not come with a cooling solution powerful enough to allow both CPUs to run at their maximum clock speeds over an extended period of time.

Cinebench R10 Shading 32Bit
7069
Cinebench R10 Rendering Multiple CPUs 32Bit
16509
Cinebench R10 Rendering Single 32Bit
4382
Cinebench R11.5 OpenGL 64Bit
29.98 fps
Cinebench R11.5 CPU Multi 64Bit
6.74 Points
Cinebench R11.5 CPU Single 64Bit
1.58 Points
Cinebench R15 Ref. Match 64Bit
98 %
Cinebench R15 OpenGL 64Bit
37.13 fps
Cinebench R15 CPU Multi 64Bit
589 Points
Cinebench R15 CPU Single 64Bit
139 Points
Help
Cinebench R15
CPU Single 64Bit
Fujitsu Lifebook E548
Intel Core i5-8250U
143 Points ∼100% +3%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
142 Points ∼99% +2%
Dell Latitude 5490-TD70X
Intel Core i5-8350U
142 Points ∼99% +2%
Lenovo ThinkPad L480-20LS001AGE
Intel Core i5-8250U
142 Points ∼99% +2%
HP ProBook 645 G4 3UP62EA
AMD Ryzen 5 PRO 2500U
139 Points ∼97%
Acer Swift 3 SF315-41G-R6BR
AMD Ryzen 5 2500U
138 Points ∼97% -1%
Average AMD Ryzen 5 PRO 2500U
  (134 - 139, n=2)
137 Points ∼96% -1%
HP ProBook 640 G3 Z2W33ET
Intel Core i5-7200U
126 Points ∼88% -9%
Average of class Office
  (20 - 178, n=465)
108 Points ∼76% -22%
CPU Multi 64Bit
Lenovo ThinkPad L480-20LS001AGE
Intel Core i5-8250U
620 Points ∼100% +5%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
618 Points ∼100% +5%
Acer Swift 3 SF315-41G-R6BR
AMD Ryzen 5 2500U
613 Points ∼99% +4%
Dell Latitude 5490-TD70X
Intel Core i5-8350U
599 Points ∼97% +2%
HP ProBook 645 G4 3UP62EA
AMD Ryzen 5 PRO 2500U
589 Points ∼95%
Average AMD Ryzen 5 PRO 2500U
  (553 - 589, n=2)
571 Points ∼92% -3%
Fujitsu Lifebook E548
Intel Core i5-8250U
534 Points ∼86% -9%
HP ProBook 640 G3 Z2W33ET
Intel Core i5-7200U
327 Points ∼53% -44%
Average of class Office
  (36 - 1050, n=469)
314 Points ∼51% -47%
Cinebench R11.5
CPU Single 64Bit
Dell Latitude 5490-TD70X
Intel Core i5-8350U
1.62 Points ∼100% +3%
Lenovo ThinkPad L480-20LS001AGE
Intel Core i5-8250U
1.62 Points ∼100% +3%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
1.61 Points ∼99% +2%
HP ProBook 645 G4 3UP62EA
AMD Ryzen 5 PRO 2500U
1.58 Points ∼98%
Acer Swift 3 SF315-41G-R6BR
AMD Ryzen 5 2500U
1.57 Points ∼97% -1%
Average AMD Ryzen 5 PRO 2500U
  (1.5 - 1.58, n=2)
1.54 Points ∼95% -3%
HP ProBook 640 G3 Z2W33ET
Intel Core i5-7200U
1.47 Points ∼91% -7%
Average of class Office
  (0.23 - 2.04, n=416)
1.12 Points ∼69% -29%
CPU Multi 64Bit
Dell Latitude 5490-TD70X
Intel Core i5-8350U
7.33 Points ∼100% +9%
Lenovo ThinkPad L480-20LS001AGE
Intel Core i5-8250U
7.01 Points ∼96% +4%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
6.91 Points ∼94% +3%
Acer Swift 3 SF315-41G-R6BR
AMD Ryzen 5 2500U
6.82 Points ∼93% +1%
HP ProBook 645 G4 3UP62EA
AMD Ryzen 5 PRO 2500U
6.74 Points ∼92%
Average AMD Ryzen 5 PRO 2500U
  (6.04 - 6.74, n=2)
6.39 Points ∼87% -5%
HP ProBook 640 G3 Z2W33ET
Intel Core i5-7200U
3.67 Points ∼50% -46%
Average of class Office
  (0.26 - 11.6, n=588)
2.72 Points ∼37% -60%
Cinebench R10
Rendering Single 32Bit
Lenovo ThinkPad L480-20LS001AGE
Intel Core i5-8250U
5476 Points ∼100% +25%
Dell Latitude 5490-TD70X
Intel Core i5-8350U
5152 Points ∼94% +18%
HP ProBook 640 G3 Z2W33ET
Intel Core i5-7200U
4969 Points ∼91% +13%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
4473 Points ∼82% +2%
Acer Swift 3 SF315-41G-R6BR
AMD Ryzen 5 2500U
4449 Points ∼81% +2%
HP ProBook 645 G4 3UP62EA
AMD Ryzen 5 PRO 2500U
4382 Points ∼80%
Average AMD Ryzen 5 PRO 2500U
  (4204 - 4382, n=2)
4293 Points ∼78% -2%
Average of class Office
  (667 - 8356, n=658)
3289 Points ∼60% -25%
Rendering Multiple CPUs 32Bit
Lenovo ThinkPad L480-20LS001AGE
Intel Core i5-8250U
19840 Points ∼100% +20%
Dell Latitude 5490-TD70X
Intel Core i5-8350U
19640 Points ∼99% +19%
HP ProBook 645 G4 3UP62EA
AMD Ryzen 5 PRO 2500U
16509 Points ∼83%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
16466 Points ∼83% 0%
Average AMD Ryzen 5 PRO 2500U
  (14336 - 16509, n=2)
15423 Points ∼78% -7%
Acer Swift 3 SF315-41G-R6BR
AMD Ryzen 5 2500U
13850 Points ∼70% -16%
HP ProBook 640 G3 Z2W33ET
Intel Core i5-7200U
11261 Points ∼57% -32%
Average of class Office
  (1242 - 32009, n=646)
7676 Points ∼39% -54%
Geekbench 3
32 Bit Multi-Core Score
Average AMD Ryzen 5 PRO 2500U
  (12111 - 12732, n=2)
12422 Points ∼100% +3%
HP ProBook 645 G4 3UP62EA
AMD Ryzen 5 PRO 2500U
12111 Points ∼97%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
11301 Points ∼91% -7%
Acer Swift 3 SF315-41G-R6BR
AMD Ryzen 5 2500U
10506 Points ∼85% -13%
HP ProBook 640 G3 Z2W33ET
Intel Core i5-7200U
6443 Points ∼52% -47%
Average of class Office
  (1016 - 13931, n=174)
5485 Points ∼44% -55%
32 Bit Single-Core Score
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
3477 Points ∼100% +8%
Acer Swift 3 SF315-41G-R6BR
AMD Ryzen 5 2500U
3428 Points ∼99% +7%
Average AMD Ryzen 5 PRO 2500U
  (3218 - 3434, n=2)
3326 Points ∼96% +3%
HP ProBook 645 G4 3UP62EA
AMD Ryzen 5 PRO 2500U
3218 Points ∼93%
HP ProBook 640 G3 Z2W33ET
Intel Core i5-7200U
2893 Points ∼83% -10%
Average of class Office
  (595 - 4020, n=174)
2253 Points ∼65% -30%
Geekbench 4.0
64 Bit Multi-Core Score
Average AMD Ryzen 5 PRO 2500U
  (9398 - 10121, n=2)
9760 Points ∼100% +4%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
9616 Points ∼99% +2%
Acer Swift 3 SF315-41G-R6BR
AMD Ryzen 5 2500U
9480 Points ∼97% +1%
HP ProBook 645 G4 3UP62EA
AMD Ryzen 5 PRO 2500U
9398 Points ∼96%
Average of class Office
  (1834 - 15294, n=55)
6974 Points ∼71% -26%
HP ProBook 640 G3 Z2W33ET
Intel Core i5-7200U
6789 Points ∼70% -28%
64 Bit Single-Core Score
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
3605 Points ∼100% +5%
HP ProBook 640 G3 Z2W33ET
Intel Core i5-7200U
3590 Points ∼100% +5%
Acer Swift 3 SF315-41G-R6BR
AMD Ryzen 5 2500U
3558 Points ∼99% +4%
Average AMD Ryzen 5 PRO 2500U
  (3430 - 3530, n=2)
3480 Points ∼97% +1%
HP ProBook 645 G4 3UP62EA
AMD Ryzen 5 PRO 2500U
3430 Points ∼95%
Average of class Office
  (1087 - 4801, n=55)
3175 Points ∼88% -7%
Geekbench 4.1/4.2
64 Bit Multi-Core Score
Dell Latitude 5490-TD70X
Intel Core i5-8350U
11004 Points ∼100% +18%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
9835 Points ∼89% +5%
Average AMD Ryzen 5 PRO 2500U
  (9096 - 10447, n=3)
9629 Points ∼88% +3%
Acer Swift 3 SF315-41G-R6BR
AMD Ryzen 5 2500U
9434 Points ∼86% +1%
HP ProBook 645 G4 3UP62EA
AMD Ryzen 5 PRO 2500U
9343 Points ∼85%
Average of class Office
  (1736 - 16294, n=39)
7827 Points ∼71% -16%
64 Bit Single-Core Score
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
3767 Points ∼100% +8%
Acer Swift 3 SF315-41G-R6BR
AMD Ryzen 5 2500U
3657 Points ∼97% +5%
Dell Latitude 5490-TD70X
Intel Core i5-8350U
3646 Points ∼97% +4%
HP ProBook 645 G4 3UP62EA
AMD Ryzen 5 PRO 2500U
3492 Points ∼93%
Average AMD Ryzen 5 PRO 2500U
  (3353 - 3631, n=3)
3492 Points ∼93% 0%
Average of class Office
  (1084 - 4997, n=39)
3322 Points ∼88% -5%
Mozilla Kraken 1.1 - Total Score
Average of class Office
  (914 - 9672, n=205)
2204 ms * ∼100% -54%
Average AMD Ryzen 5 PRO 2500U
  (1429 - 1659, n=2)
1544 ms * ∼70% -8%
HP ProBook 645 G4 3UP62EA
AMD Ryzen 5 PRO 2500U (Edge 42)
1429.1 ms * ∼65%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U (Edge 41)
1346.7 ms * ∼61% +6%
Acer Swift 3 SF315-41G-R6BR
AMD Ryzen 5 2500U (Edge 42)
1326.5 ms * ∼60% +7%
Lenovo ThinkPad L480-20LS001AGE
Intel Core i5-8250U (Edge 41.16299.248.0)
1275.8 ms * ∼58% +11%
HP ProBook 640 G3 Z2W33ET
Intel Core i5-7200U (Edge 38)
1196.4 ms * ∼54% +16%
Octane V2 - Total Score
HP ProBook 640 G3 Z2W33ET
Intel Core i5-7200U (Edge 38)
31995 Points ∼100% +34%
Lenovo ThinkPad L480-20LS001AGE
Intel Core i5-8250U (Edge 41.16299.248.0)
29269 Points ∼91% +22%
Acer Swift 3 SF315-41G-R6BR
AMD Ryzen 5 2500U (Edge 42)
27082 Points ∼85% +13%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U (Edge 41)
26832 Points ∼84% +12%
HP ProBook 645 G4 3UP62EA
AMD Ryzen 5 PRO 2500U (Edge 42)
23903 Points ∼75%
Average AMD Ryzen 5 PRO 2500U
 
23903 Points ∼75% 0%
Average of class Office
  (3727 - 40798, n=197)
22101 Points ∼69% -8%
JetStream 1.1 - 1.1 Total Score
Lenovo ThinkPad L480-20LS001AGE
Intel Core i5-8250U (Edge 41.16299.248.0)
216.87 Points ∼100% +20%
HP ProBook 640 G3 Z2W33ET
Intel Core i5-7200U (Edge 38)
214.4 Points ∼99% +18%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U (Edge 41)
193 Points ∼89% +6%
Acer Swift 3 SF315-41G-R6BR
AMD Ryzen 5 2500U (Edge 42)
190.93 Points ∼88% +5%
HP ProBook 645 G4 3UP62EA
AMD Ryzen 5 PRO 2500U (Edge 42)
181.4 Points ∼84%
Fujitsu Lifebook E548
Intel Core i5-8250U
175.45 Points ∼81% -3%
Average of class Office
  (36.7 - 268, n=200)
175 Points ∼81% -4%
Average AMD Ryzen 5 PRO 2500U
  (118 - 181, n=2)
150 Points ∼69% -17%

* ... smaller is better

System Performance

The combination of a quad-core CPU and an NVMe SSD creates a very responsive system. We did not encounter any problems. The results in the PCMark benchmarks are in good order. The fact that the benchmark results fall behind those of a Core i5-8250U-based Lenovo ThinkPad L480 should not be a cause for concern. In day-to-day use, we saw no differences. The ThinkPad pulls ahead when the CPU is taxed over a prolonged period of time. An increase in overall performance is possible through the installation of a second RAM module as this will enable dual-channel mode.

HP utilizes only one RAM module, which hurts GPU performance in a big way.
HP utilizes only one RAM module, which hurts GPU performance in a big way.
PCMark 7 Score
5885 points
PCMark 8 Home Score Accelerated v2
3594 points
PCMark 8 Work Score Accelerated v2
4647 points
Help
PCMark 8
Work Score Accelerated v2
Lenovo ThinkPad L480-20LS001AGE
UHD Graphics 620, 8250U, Toshiba KXG5AZNV256G
4871 Points ∼100% +5%
Dell Latitude 5490-TD70X
UHD Graphics 620, 8350U, Toshiba KSG60ZMV512G
4774 Points ∼98% +3%
HP ProBook 645 G4 3UP62EA
Vega 8, PRO 2500U, Toshiba XG5 KXG50ZNV256G
4647 Points ∼95%
HP ProBook 640 G3 Z2W33ET
HD Graphics 620, 7200U, Samsung PM951 NVMe MZVLV256
4545 Points ∼93% -2%
Average AMD Ryzen 5 PRO 2500U, AMD Radeon RX Vega 8
  (4123 - 4647, n=2)
4385 Points ∼90% -6%
Average of class Office
  (1226 - 5428, n=297)
3945 Points ∼81% -15%
Home Score Accelerated v2
Lenovo ThinkPad L480-20LS001AGE
UHD Graphics 620, 8250U, Toshiba KXG5AZNV256G
3757 Points ∼100% +5%
Dell Latitude 5490-TD70X
UHD Graphics 620, 8350U, Toshiba KSG60ZMV512G
3695 Points ∼98% +3%
HP ProBook 645 G4 3UP62EA
Vega 8, PRO 2500U, Toshiba XG5 KXG50ZNV256G
3594 Points ∼96%
HP ProBook 640 G3 Z2W33ET
HD Graphics 620, 7200U, Samsung PM951 NVMe MZVLV256
3414 Points ∼91% -5%
Average AMD Ryzen 5 PRO 2500U, AMD Radeon RX Vega 8
  (2937 - 3594, n=2)
3266 Points ∼87% -9%
Fujitsu Lifebook E548
UHD Graphics 620, 8250U, Samsung SSD PM871b MZNLN256HAJQ
3076 Points ∼82% -14%
Average of class Office
  (1169 - 4458, n=343)
3004 Points ∼80% -16%
PCMark 10
Digital Content Creation
HP ProBook 645 G4 3UP62EA
Vega 8, PRO 2500U, Toshiba XG5 KXG50ZNV256G
2924 Points ∼100%
Lenovo ThinkPad L480-20LS001AGE
UHD Graphics 620, 8250U, Toshiba KXG5AZNV256G
2879 Points ∼98% -2%
Average AMD Ryzen 5 PRO 2500U, AMD Radeon RX Vega 8
  (2359 - 2924, n=2)
2642 Points ∼90% -10%
Fujitsu Lifebook E548
UHD Graphics 620, 8250U, Samsung SSD PM871b MZNLN256HAJQ
2553 Points ∼87% -13%
Average of class Office
  (320 - 3503, n=85)
2528 Points ∼86% -14%
Productivity
Lenovo ThinkPad L480-20LS001AGE
UHD Graphics 620, 8250U, Toshiba KXG5AZNV256G
6011 Points ∼100% +15%
Average of class Office
  (1444 - 7142, n=85)
5397 Points ∼90% +3%
HP ProBook 645 G4 3UP62EA
Vega 8, PRO 2500U, Toshiba XG5 KXG50ZNV256G
5235 Points ∼87%
Average AMD Ryzen 5 PRO 2500U, AMD Radeon RX Vega 8
  (3759 - 5235, n=2)
4497 Points ∼75% -14%
Fujitsu Lifebook E548
UHD Graphics 620, 8250U, Samsung SSD PM871b MZNLN256HAJQ
4366 Points ∼73% -17%
Essentials
Lenovo ThinkPad L480-20LS001AGE
UHD Graphics 620, 8250U, Toshiba KXG5AZNV256G
7437 Points ∼100% +9%
HP ProBook 645 G4 3UP62EA
Vega 8, PRO 2500U, Toshiba XG5 KXG50ZNV256G
6825 Points ∼92%
Average of class Office
  (2683 - 8562, n=85)
6788 Points ∼91% -1%
Average AMD Ryzen 5 PRO 2500U, AMD Radeon RX Vega 8
  (5848 - 6825, n=2)
6337 Points ∼85% -7%
Fujitsu Lifebook E548
UHD Graphics 620, 8250U, Samsung SSD PM871b MZNLN256HAJQ
5929 Points ∼80% -13%
Score
HP ProBook 645 G4 3UP62EA
Vega 8, PRO 2500U, Toshiba XG5 KXG50ZNV256G
3376 Points ∼100%
Average of class Office
  (803 - 4269, n=86)
3125 Points ∼93% -7%
Average AMD Ryzen 5 PRO 2500U, AMD Radeon RX Vega 8
  (2673 - 3376, n=2)
3025 Points ∼90% -10%
Fujitsu Lifebook E548
UHD Graphics 620, 8250U, Samsung SSD PM871b MZNLN256HAJQ
2898 Points ∼86% -14%
Lenovo ThinkPad L480-20LS001AGE
UHD Graphics 620, 8250U, Toshiba KXG5AZNV256G
2488 Points ∼74% -26%

Storage Devices

An SSD from Toshiba serves as the system drive. What we have here is an M.2-2280 SSD with a capacity of 256 GB. Right out of the box, only 182 GB is available to the user. The Windows Installation files and the Recovery Partition take up the rest of the storage space. The transfer rates of the SSD are in good order. NVMe SSDs achieve faster transfer rates than SATA-III models, because they are connected via PCI Express 3.0 x4. The M.2-2280 slot supports not only NVMe SSDs, but also SATA-III models.

Inside the ProBook 645 G4, there is a 2.5-inch drive bay for an additional hard drive or an SSD. However, our review device offers neither an installation frame for an HDD nor a SATA connector. Having said that, you can buy all the necessary parts from HP’s online store for 13.45 Euros (~$16).

An SSD is provided.
An SSD is provided.
An additional 2.5-inch drive can also be installed.
An additional 2.5-inch drive can also be installed.
Toshiba XG5 KXG50ZNV256G
Sequential Read: 1895 MB/s
Sequential Write: 336.1 MB/s
512K Read: 862.9 MB/s
512K Write: 340.5 MB/s
4K Read: 25.19 MB/s
4K Write: 96.98 MB/s
4K QD32 Read: 285.5 MB/s
4K QD32 Write: 221.3 MB/s
HP ProBook 645 G4 3UP62EA
Toshiba XG5 KXG50ZNV256G
Dell Latitude 5490-TD70X
Toshiba KSG60ZMV512G
Fujitsu Lifebook E548
Samsung SSD PM871b MZNLN256HAJQ
Lenovo ThinkPad L480-20LS001AGE
Toshiba KXG5AZNV256G
Average Toshiba XG5 KXG50ZNV256G
 
CrystalDiskMark 5.2 / 6
-12%
-21%
13%
9%
Write 4K
112.8
90.37
-20%
83.19
-26%
110.8
-2%
113 (89.7 - 149, n=14)
0%
Read 4K
36.54
28.24
-23%
16.66
-54%
36.46
0%
32.1 (24.9 - 48.1, n=14)
-12%
Write Seq
370.8
433.7
17%
384.3
4%
482.4
30%
412 (313 - 1088, n=14)
11%
Read Seq
1870
469.3
-75%
466.8
-75%
1425
-24%
1818 (1151 - 2125, n=14)
-3%
Write 4K Q32T1
226.3
297.6
32%
269.7
19%
355.6
57%
328 (226 - 376, n=15)
45%
Read 4K Q32T1
301.9
293.9
-3%
260
-14%
405.6
34%
323 (242 - 412, n=15)
7%
Write Seq Q32T1
343.5
534.4
56%
532.1
55%
495.2
44%
447 (292 - 1078, n=15)
30%
Read Seq Q32T1
2742
531.3
-81%
544.5
-80%
1777
-35%
2492 (1779 - 2813, n=15)
-9%

Graphics Card

Our review device does not offer a dedicated graphics card. The integrated AMD Radeon RX Vega 8 graphics chip is responsible for image rendering. It supports DirectX 12 and has a maximum core clock of 1100 MHz. The results in the 3DMark benchmarks are on the normal level for this kind of GPU. Intel’s counterpart, the UHD Graphics 620, is unable to keep up with AMD’s graphics solution. The Vega 8 performs almost as well as Nvidia’s dedicated GeForce 940MX GPU.

The performance of the Vega 8 GPU can be increased by installing a second RAM module (= activating dual-channel mode). We tried this: The benchmark results improved by up to 47%. We have included the results in the chart below.

3DMark 06 Standard
10807 points
3DMark 11 Performance
3014 points
3DMark Ice Storm Standard Score
66295 points
3DMark Cloud Gate Standard Score
9329 points
3DMark Fire Strike Score
1606 points
3DMark Time Spy Score
604 points
Help
3DMark 11 - 1280x720 Performance GPU
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U (Dual-Channel)
3608 Points ∼100% +22%
Average AMD Radeon RX Vega 8
  (1668 - 4317, n=11)
3194 Points ∼89% +8%
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U
2954 Points ∼82%
Lenovo ThinkPad L480-20LS001AGE
Intel UHD Graphics 620, Intel Core i5-8250U
1678 Points ∼47% -43%
Dell Latitude 5490-TD70X
Intel UHD Graphics 620, Intel Core i5-8350U
1617 Points ∼45% -45%
Fujitsu Lifebook E548
Intel UHD Graphics 620, Intel Core i5-8250U
1533 Points ∼42% -48%
HP ProBook 640 G3 Z2W33ET
Intel HD Graphics 620, Intel Core i5-7200U
1423 Points ∼39% -52%
Average of class Office
  (185 - 4967, n=590)
1212 Points ∼34% -59%
3DMark
2560x1440 Time Spy Graphics
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U (Dual-Channel)
702 Points ∼100% +31%
Average AMD Radeon RX Vega 8
  (535 - 702, n=3)
629 Points ∼90% +18%
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U
535 Points ∼76%
Average of class Office
  (76 - 1158, n=30)
400 Points ∼57% -25%
Lenovo ThinkPad L480-20LS001AGE
Intel UHD Graphics 620, Intel Core i5-8250U
336 Points ∼48% -37%
1920x1080 Fire Strike Graphics
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U (Dual-Channel)
2472 Points ∼100% +39%
Average AMD Radeon RX Vega 8
  (1095 - 2901, n=10)
1972 Points ∼80% +11%
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U
1775 Points ∼72%
Lenovo ThinkPad L480-20LS001AGE
Intel UHD Graphics 620, Intel Core i5-8250U
1019 Points ∼41% -43%
Dell Latitude 5490-TD70X
Intel UHD Graphics 620, Intel Core i5-8350U
981 Points ∼40% -45%
Average of class Office
  (138 - 4109, n=424)
934 Points ∼38% -47%
HP ProBook 640 G3 Z2W33ET
Intel HD Graphics 620, Intel Core i5-7200U
808 Points ∼33% -54%
1280x720 Sky Diver Graphics
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U (Dual-Channel)
8237 Points ∼100% +28%
Average AMD Radeon RX Vega 8
  (6444 - 9699, n=4)
8070 Points ∼98% +25%
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U
6444 Points ∼78%
Lenovo ThinkPad L480-20LS001AGE
Intel UHD Graphics 620, Intel Core i5-8250U
3939 Points ∼48% -39%
Average of class Office
  (400 - 8237, n=107)
2850 Points ∼35% -56%
1280x720 Cloud Gate Standard Graphics
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U (Dual-Channel)
15770 Points ∼100% +47%
Average AMD Radeon RX Vega 8
  (7309 - 18177, n=10)
12851 Points ∼81% +20%
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U
10692 Points ∼68%
Lenovo ThinkPad L480-20LS001AGE
Intel UHD Graphics 620, Intel Core i5-8250U
8266 Points ∼52% -23%
Dell Latitude 5490-TD70X
Intel UHD Graphics 620, Intel Core i5-8350U
8226 Points ∼52% -23%
HP ProBook 640 G3 Z2W33ET
Intel HD Graphics 620, Intel Core i5-7200U
6956 Points ∼44% -35%
Average of class Office
  (1208 - 27117, n=468)
6518 Points ∼41% -39%
3DMark 06 - 1280x1024 Standard AA:0x AF:0x
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U (Dual-Channel)
14279 Points ∼100% +32%
Average AMD Radeon RX Vega 8
  (10336 - 20501, n=4)
13981 Points ∼98% +29%
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U
10807 Points ∼76%
HP ProBook 640 G3 Z2W33ET
Intel HD Graphics 620, Intel Core i5-7200U
7879 Points ∼55% -27%
Average of class Office
  (177 - 23657, n=417)
5077 Points ∼36% -53%
Geekbench 4.0 - Compute OpenCL Score
Average AMD Radeon RX Vega 8
  (24762 - 38738, n=4)
31196 Points ∼100% +26%
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U (Dual-Channel)
29692 Points ∼95% +20%
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U
24762 Points ∼79%
Average of class Office
  (6555 - 31217, n=51)
17592 Points ∼56% -29%
HP ProBook 640 G3 Z2W33ET
Intel HD Graphics 620, Intel Core i5-7200U
16673 Points ∼53% -33%
Geekbench 4.1/4.2 - Compute OpenCL Score
Average AMD Radeon RX Vega 8
  (24793 - 39262, n=5)
30241 Points ∼100% +22%
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U (Dual-Channel)
30218 Points ∼100% +22%
HP ProBook 645 G4 3UP62EA
AMD Radeon RX Vega 8, AMD Ryzen 5 PRO 2500U
24793 Points ∼82%
Average of class Office
  (1267 - 31328, n=39)
17562 Points ∼58% -29%
Dell Latitude 5490-TD70X
Intel UHD Graphics 620, Intel Core i5-8350U
9160 Points ∼30% -63%

Gaming Performance

The built-in APU can run many games at decent frame rates. However, most games can only be run at low resolution (720p) and on low to medium settings. Non-demanding titles can be played at higher resolutions and with better quality settings. Graphically demanding titles such as “Final Fantasy XV” are not playable. The frame rates can be boosted by installing a second RAM module. We tried this. You can see the results in the chart below.

low med. high ultra
Tomb Raider (2013) 95.7574320.2fps
BioShock Infinite (2013) 81.452.441.212.7fps
Rise of the Tomb Raider (2016) 29.919.610.68.2fps
BioShock Infinite - 1366x768 Medium Preset
Average AMD Radeon RX Vega 8
  (52.4 - 68.3, n=3)
60.1 fps ∼100% +15%
HP ProBook 645 G4 3UP62EA
Vega 8, PRO 2500U (Dual-Channel)
59.6 fps ∼99% +14%
HP ProBook 645 G4 3UP62EA
Vega 8, PRO 2500U, Toshiba XG5 KXG50ZNV256G
52.4 fps ∼87%
Average of class Office
  (27 - 119, n=313)
29.3 fps ∼49% -44%
Lenovo ThinkPad L480-20LS001AGE
UHD Graphics 620, 8250U, Toshiba KXG5AZNV256G
27.8 fps ∼46% -47%
Fujitsu Lifebook E548
UHD Graphics 620, 8250U, Samsung SSD PM871b MZNLN256HAJQ
26.26 fps ∼44% -50%
HP ProBook 640 G3 Z2W33ET
HD Graphics 620, 7200U, Samsung PM951 NVMe MZVLV256
24.5 fps ∼41% -53%
Tomb Raider - 1366x768 Normal Preset AA:FX AF:4x
HP ProBook 645 G4 3UP62EA
Vega 8, PRO 2500U (Dual-Channel)
71.9 fps ∼100% +26%
Average AMD Radeon RX Vega 8
  (57 - 71.9, n=3)
63.3 fps ∼88% +11%
HP ProBook 645 G4 3UP62EA
Vega 8, PRO 2500U, Toshiba XG5 KXG50ZNV256G
57 fps ∼79%
HP ProBook 640 G3 Z2W33ET
HD Graphics 620, 7200U, Samsung PM951 NVMe MZVLV256
33.4 fps ∼46% -41%
Average of class Office
  (6.1 - 135, n=228)
27.5 fps ∼38% -52%
Rise of the Tomb Raider - 1024x768 Lowest Preset
HP ProBook 645 G4 3UP62EA
Vega 8, PRO 2500U (Dual-Channel)
42.6 fps ∼100% +42%
Average AMD Radeon RX Vega 8
  (27.7 - 49.3, n=6)
36.4 fps ∼85% +22%
HP ProBook 645 G4 3UP62EA
Vega 8, PRO 2500U, Toshiba XG5 KXG50ZNV256G
29.9 fps ∼70%
Average of class Office
  (6.2 - 111, n=91)
26 fps ∼61% -13%
Dell Latitude 5490-TD70X
UHD Graphics 620, 8350U, Toshiba KSG60ZMV512G
18.68 fps ∼44% -38%
Lenovo ThinkPad L480-20LS001AGE
UHD Graphics 620, 8250U, Toshiba KXG5AZNV256G
18.6 fps ∼44% -38%

Emissions – The HP laptop does not make a lot of noise

System Noise

The ProBook 645 G4 is not overly loud under any load. As a rule, the fan stands still when the device is idle. This leads to silent operation. Under load, the fan starts to spin up. During our stress test (running Prime95 and FurMark for at least one straight hour), we measured a sound pressure level of 36.4 dB(A), which is a very good result.

Noise Level

Idle
30.8 / 30.8 / 30.8 dB(A)
Load
34.7 / 36.4 dB(A)
  red to green bar
 
 
30 dB
silent
40 dB(A)
audible
50 dB(A)
loud
 
min: dark, med: mid, max: light   Audix TM1, Arta (15 cm distance)   environment noise: 30.8 dB(A)
dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs203329.731.931.7332535.434.736.629.535.43144.345.14830.244.34034.430.230.529.334.45038.730.531.529.838.76334.629.529.427.734.6802826.72726.1281002725.526.425.92712525.724.825.424.625.716024.523.724.323.824.52002423.822.9222425023.122.42220.923.13152322.721.421.32340022.823.121.122.122.850021.522.219.418.921.563021.622.419.418.321.680022.924.318.918.222.9100023.725.618.61823.7125023.224.91817.423.2160023.9261817.423.9200024.526.118.317.424.5250024.926.617.817.424.9315024.127.217.917.524.1400020.9231817.920.9500019.420.718.21819.4630018.919.418.418.418.9800018.919.118.718.718.91000019.319.218.918.919.31250019.519.319.11919.51600019.619.519.519.419.6SPL34.736.430.830.434.7N22.21.31.32median 23HP ProBook 645 G4 3UP62EAmedian 23.1median 18.9median 18.7median 23Delta2.12.31.722.1hearing rangehide median Fan Noise
HP ProBook 645 G4 3UP62EA
PRO 2500U, Vega 8
HP ProBook 640 G3 Z2W33ET
7200U, HD Graphics 620
Dell Latitude 5490-TD70X
8350U, UHD Graphics 620
Fujitsu Lifebook E548
8250U, UHD Graphics 620
Lenovo ThinkPad L480-20LS001AGE
8250U, UHD Graphics 620
Average AMD Radeon RX Vega 8
 
Average of class Office
 
Noise
4%
0%
3%
2%
0%
-0%
off / environment *
30.8
30.7
-0%
28.8
6%
30
3%
30.4
1%
30 (28.1 - 31.8, n=10)
3%
29.8 (27.8 - 31.8, n=235)
3%
Idle Minimum *
30.8
30.7
-0%
28.8
6%
30
3%
30.4
1%
30.7 (28.1 - 32.8, n=10)
-0%
30.5 (27.8 - 39.8, n=929)
1%
Idle Average *
30.8
30.7
-0%
28.8
6%
30
3%
30.4
1%
31.1 (29.3 - 32.8, n=10)
-1%
31.2 (27.8 - 47.4, n=929)
-1%
Idle Maximum *
30.8
31.5
-2%
30.9
-0%
30
3%
30.4
1%
31.5 (29.6 - 34.2, n=10)
-2%
31.7 (27.8 - 46.7, n=928)
-3%
Load Average *
34.7
31.4
10%
35.6
-3%
35.3
-2%
32.3
7%
34.6 (31.6 - 38.8, n=10)
-0%
33.7 (22.6 - 49.1, n=928)
3%
Load Maximum *
36.4
31.1
15%
41.4
-14%
33.9
7%
37
-2%
35.8 (31.4 - 45.3, n=10)
2%
38.1 (31 - 55.6, n=927)
-5%

* ... smaller is better

Temperature

The ProBook during the Stress test
The ProBook during the Stress test

The ProBook 645 G4 completes our stress test (running Prime95 and FurMark for at least one straight hour) with similar results, both when plugged in and when running on battery power. In the first benchmark run, the processor operates at 2.6 GHz and the GPU runs at 630 to 640 MHz. In the subsequent benchmark run, the CPU frequency sinks down to 1.7 to 1.8 GHz and the GPU clock fluctuates between 200 and 250 MHz. The clock rates stabilize after this.

The laptop does not become hot. The 40-degree Celsius (104 °F) mark is never exceeded. The stress test is an extreme case scenario, which is very unlikely to occur in real life. We use it to test system stability.

Max. Load
 34.2 °C
94 F
35 °C
95 F
34 °C
93 F
 
 32.7 °C
91 F
36.5 °C
98 F
34.3 °C
94 F
 
 25.1 °C
77 F
26.1 °C
79 F
26.1 °C
79 F
 
Maximum: 36.5 °C = 98 F
Average: 31.6 °C = 89 F
32.4 °C
90 F
34.7 °C
94 F
31.2 °C
88 F
33 °C
91 F
30 °C
86 F
33.3 °C
92 F
28.7 °C
84 F
27.2 °C
81 F
26.4 °C
80 F
Maximum: 34.7 °C = 94 F
Average: 30.8 °C = 87 F
Power Supply (max.)  46 °C = 115 F | Room Temperature 23 °C = 73 F | FIRT 550-Pocket
Heat distribution on the upper side (under load)
Heat distribution on the upper side (under load)
Heat distribution on the underside (under load)
Heat distribution on the underside (under load)
Heat distribution on the upper side (at idle)
Heat distribution on the upper side (at idle)
Heat distribution on the underside (at idle)
Heat distribution on the underside (at idle)
HP ProBook 645 G4 3UP62EA
PRO 2500U, Vega 8
HP ProBook 640 G3 Z2W33ET
7200U, HD Graphics 620
Dell Latitude 5490-TD70X
8350U, UHD Graphics 620
Fujitsu Lifebook E548
8250U, UHD Graphics 620
Lenovo ThinkPad L480-20LS001AGE
8250U, UHD Graphics 620
Average AMD Radeon RX Vega 8
 
Average of class Office
 
Heat
10%
1%
-7%
-3%
-4%
-5%
Maximum Upper Side *
36.5
34
7%
38.3
-5%
40.3
-10%
43
-18%
38.5 (36.5 - 41.8, n=10)
-5%
38 (26 - 62.5, n=886)
-4%
Maximum Bottom *
34.7
33.2
4%
44.7
-29%
42.6
-23%
41.7
-20%
40.9 (33.8 - 50.6, n=10)
-18%
41.2 (28 - 71.6, n=886)
-19%
Idle Upper Side *
29.6
25.6
14%
23.7
20%
28
5%
25.7
13%
28.9 (23.7 - 38.6, n=10)
2%
29.2 (21.2 - 40, n=789)
1%
Idle Bottom *
31
26
16%
25.4
18%
31
-0%
27.1
13%
29 (23.9 - 34.2, n=10)
6%
30.8 (22.3 - 44.9, n=789)
1%

* ... smaller is better

Speakers

The stereo speakers are located on the underside of the device behind a perforated cover. They produce a very clear sound that is completely lacking bass. For a better listening experience, you should use a pair of headphones or external speakers.

dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2033.431.733.42534.729.534.73144.430.244.44030.629.330.65029.629.829.66328.127.728.18026.926.126.910025.525.925.512524.424.624.416027.423.827.420035.22235.225034.620.934.631543.521.343.540057.222.157.250053.818.953.863054.218.354.280056.418.256.4100062.41862.4125066.417.466.4160065.617.465.6200062.317.462.3250064.117.464.131506217.562400061.717.961.75000651865630067.718.467.7800068.518.768.51000068.618.968.61250067.81967.81600058.619.458.6SPL76.630.476.6N33.81.333.8median 61.7HP ProBook 645 G4 3UP62EAmedian 18.7median 61.7Delta1121135.335.132.931.831.83236.535.132.428.93328.936.328.848.32761.52752.924.860.92462.822.763.32269.521.267.82174.82075.919.472.718.97117.770.117.86917.671.817.668.117.671.417.673.717.670.417.571.617.671.617.669.617.459.717.583.630.662.51.5median 69.6Apple MacBook 12 (Early 2016) 1.1 GHzmedian 17.84.62.4hearing rangehide median Pink Noise
Frequency diagram (checkboxes can be checked and unchecked to compare devices)
HP ProBook 645 G4 3UP62EA audio analysis

(-) | not very loud speakers (68.58 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 29.9% lower than median
(±) | linearity of bass is average (8.9% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 4.4% away from median
(±) | linearity of mids is average (9.8% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 3.7% away from median
(+) | highs are linear (3.7% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (25.2% difference to median)
Compared to same class
» 81% of all tested devices in this class were better, 5% similar, 14% worse
» The best had a delta of 8%, average was 21%, worst was 51%
Compared to all devices tested
» 71% of all tested devices were better, 7% similar, 22% worse
» The best had a delta of 3%, average was 21%, worst was 53%

Apple MacBook 12 (Early 2016) 1.1 GHz audio analysis

(+) | speakers can play relatively loud (83.6 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 11.3% lower than median
(±) | linearity of bass is average (14.2% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 2.4% away from median
(+) | mids are linear (5.5% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 2% away from median
(+) | highs are linear (4.5% delta to prev. frequency)
Overall 100 - 16.000 Hz
(+) | overall sound is linear (9.3% difference to median)
Compared to same class
» 2% of all tested devices in this class were better, 1% similar, 97% worse
» The best had a delta of 8%, average was 19%, worst was 47%
Compared to all devices tested
» 2% of all tested devices were better, 1% similar, 98% worse
» The best had a delta of 3%, average was 21%, worst was 53%

Energy Management – The ProBook does not last long

Energy Consumption

When idle, the ProBook draws very little power. Here the power draw peaked at 10.3 watts. During the stress test, in which we run Prime95 and FurMark simultaneously for at least one straight hour, the power draw rose up to 44.2 watts. However, we only observed this level of power consumption at the beginning of the test, because after a while the CPU and the GPU throttled down considerably. When we ran only Prime95, the energy consumption jumped to 50.2 watts. The rated output of the AC adapter amounts to 45 watts.

Power Consumption
Off / Standbydarklight 0.47 / 0.6 Watt
Idledarkmidlight 7.2 / 9.7 / 10.3 Watt
Load midlight 42 / 44.2 Watt
 color bar
Key: min: dark, med: mid, max: light        Metrahit Energy
HP ProBook 645 G4 3UP62EA
PRO 2500U, Vega 8
HP ProBook 640 G3 Z2W33ET
7200U, HD Graphics 620
Dell Latitude 5490-TD70X
8350U, UHD Graphics 620
Fujitsu Lifebook E548
8250U, UHD Graphics 620
Lenovo ThinkPad L480-20LS001AGE
8250U, UHD Graphics 620
Average AMD Radeon RX Vega 8
 
Average of class Office
 
Power Consumption
46%
16%
43%
27%
4%
-12%
Idle Minimum *
7.2
2.3
68%
3.3
54%
3.1
57%
3.3
54%
6.12 (4.5 - 7.6, n=10)
15%
7.82 (0.77 - 32, n=903)
-9%
Idle Average *
9.7
5.2
46%
5.54
43%
5
48%
6.6
32%
9.15 (7 - 12.9, n=10)
6%
11.7 (4.2 - 42, n=903)
-21%
Idle Maximum *
10.3
5.6
46%
6.59
36%
6.1
41%
7.3
29%
11.1 (8.5 - 13.7, n=10)
-8%
14.1 (5 - 67, n=903)
-37%
Load Average *
42
27.2
35%
42.4
-1%
27
36%
40.4
4%
39 (24.1 - 45.7, n=10)
7%
37.4 (7.43 - 99.3, n=888)
11%
Load Maximum *
44.2
28.7
35%
67.6
-53%
29.7
33%
37.4
15%
43.7 (26.5 - 57.1, n=10)
1%
45.9 (12.2 - 129, n=890)
-4%

* ... smaller is better

Battery Life

In our practically-oriented Wi-Fi test, the ProBook 645 G4 achieves a runtime of 4 h 50 m. This test simulates loads that are consistent with surfing the web. The “balanced” power plan is selected, the energy saving functions are turned off and the display brightness is set to 150 cd/m². The HP laptop achieves a runtime of 4 h 13 m in our video test. During this test, we play the short film “Big Buck Bunny” (H.264, 1920x1080) in a continuous loop. The communications modules are disabled, the energy saving functions are switched on and the display brightness is reduced to 150 cd/m².

The ProBook is not a laptop that will last for days. The battery life is disappointing for a notebook with such a price tag. We were expecting a lot more here.

48-Wh battery
48-Wh battery
Battery Runtime
Idle (without WLAN, min brightness)
9h 20min
NBC WiFi Websurfing Battery Test 1.3 (Edge 42)
4h 50min
Big Buck Bunny H.264 1080p
4h 13min
Load (maximum brightness)
1h 28min
HP ProBook 645 G4 3UP62EA
PRO 2500U, Vega 8, 48 Wh
HP ProBook 640 G3 Z2W33ET
7200U, HD Graphics 620, 46 Wh
Dell Latitude 5490-TD70X
8350U, UHD Graphics 620, 68 Wh
Fujitsu Lifebook E548
8250U, UHD Graphics 620, 50 Wh
Lenovo ThinkPad L480-20LS001AGE
8250U, UHD Graphics 620, 45 Wh
Average of class Office
 
Battery Runtime
113%
153%
75%
59%
29%
Reader / Idle
560
1477
164%
1556
178%
1011
81%
556 (101 - 1857, n=765)
-1%
H.264
253
519
105%
791
213%
479
89%
410 (139 - 791, n=146)
62%
WiFi v1.3
290
523
80%
897
209%
507
75%
460
59%
406 (105 - 964, n=282)
40%
Load
88
177
101%
97
10%
92
5%
101 (37 - 259, n=711)
15%

Verdict

Pros

+ matte IPS screen
+ Full HD resolution
+ NVMe SSD
+ empty SATA-III slot
+ fast SD card ready
+ WWAN-ready
+ good keyboard

Cons

- dim display with a poor contrast ratio
- poor battery life
- no keyboard backlight
The HP ProBook 645 G4 3UP62EA, review device provided courtesy of: HP Germany.
The HP ProBook 645 G4 3UP62EA, review device provided courtesy of: HP Germany.

The ProBook 645 G4 is a mid-range business notebook. Here HP provides a completely new case. Those who expect high-value materials will be disappointed: The case is made entirely of plastic. Only high-end devices such as the EliteBook 745 G5 offer a metal case.

The notebook comes with a Raven Ridge APU from AMD, which offers more than enough performance for all current applications. The CPU portion of the APU delivers the same level of performance as Intel-based competitors.

The integrated GPU offers more performance than Intel’s solution (UHD Graphics 620) and can run many video games at smooth frame rates. However, most modern games are only playable at low resolutions and on low settings. Unfortunately, HP does not utilize the GPU 100%, because the system runs in single-channel mode. Here we recommend installing a second RAM module to enable dual-channel mode.

An NVMe SSD creates a very responsive system. Replacing the SSD is possible. However, for this, you will have to remove the bottom cover. Besides an M.2-2280 SSD, a 2.5-inch hard drive can also be installed inside the ProBook 645 G4. Our review device does not offer an LTE modem. That being said, an LTE modem can be easily installed after the purchase. The keyboard left a very positive impression. It is fit for regular typing. Unfortunately, it does not feature a backlight. However, a keyboard backlight is available as an optional feature.

The ProBook reveals flaws that a business notebook should not have.

The matte IPS screen has good viewing angles. However, it also has a low display brightness and a poor contrast ratio. A notebook that costs 900 to 1000 Euros (~$1051 to 1167) should offer more in this respect. The battery life is poor. In our practically oriented Wi-Fi test, the ProBook lasts less than 5 hours. Here, the laptop should have lasted at least 2 to 3 hours longer.

HP ProBook 645 G4 3UP62EA - 08/28/2018 v6
Sascha Mölck

Chassis
78 / 98 → 79%
Keyboard
81%
Pointing Device
86%
Connectivity
65 / 80 → 81%
Weight
66 / 20-67 → 98%
Battery
78%
Display
81%
Games Performance
63 / 68 → 93%
Application Performance
83 / 92 → 90%
Temperature
94%
Noise
92%
Audio
50%
Camera
42 / 85 → 49%
Average
74%
84%
Office - Weighted Average

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> Notebook / Laptop Reviews and News > Reviews > HP ProBook 645 G4 (Ryzen 5 Pro 2500U, SSD, FHD) Laptop Review
Sascha Mölck, 2018-08-31 (Update: 2018-09- 5)