Notebookcheck

Galaxy Book Flex 13.3 in review: Samsung convertible with bright display

Elegant convertible. The Samsung Galaxy Book Flex 13.3 features a fancy aluminum case and a bright touchscreen. But the Windows convertible has to prove in our test that its inner components are convincing too.
Mike Wobker, 👁 Sebastian Jentsch (translated by Stephanie Chamberlain),
Samsung Galaxy Book Flex 13.3 review

After our reviews of the Samsung Galaxy Book S and the Galaxy Book Ion 13.3, both devices showed a potential for improvement. Now it's up to the Galaxy Book Flex 13.3 to show whether fine-tuning is still necessary here as well. Visually, the Windows convertible from Samsung makes a good impression, and the built-in hardware also promises enough performance for effective work.

In our test configuration with the Intel Core i5-1035G4, the Iris Plus Graphics G4, 8 GB of RAM, and a 256 GB SSD, the Galaxy Book Flex 13.3 has to be compared with the competing devices listed below. You can also add more convertibles and laptops from our database under each section.

Samsung Galaxy Book Flex 13.3 (Galaxy Book Series)
Processor
Intel Core i5-1035G4 4 x 1.1 - 3.7 GHz, Ice Lake U
Memory
8192 MB 
, dual-channel
Display
13.3 inch 16:9, 1920 x 1080 pixel 166 PPI, capacitive, BOE087A, IPS, glossy: yes
Mainboard
Intel 495 (Ice Lake-U PCH-LP Premium)
Storage
Samsung SSD PM981a MZVLB256HBHQ, 256 GB 
, 190 GB free
Soundcard
Intel Ice Lake-U/Y PCH-LP cAVS
Connections
1 USB 3.0 / 3.1 Gen1, 2 Thunderbolt, Audio Connections: combined 3.5 mm audio jack, Card Reader: microSD, 1 Fingerprint Reader, Brightness Sensor, Sensors: accelerometer, gyroscope, S Pen slot
Networking
Intel Wi-Fi 6 AX201 (a/b/g/h/n = Wi-Fi 4/ac = Wi-Fi 5/ax = Wi-Fi 6), Bluetooth 5.0
Size
height x width x depth (in mm): 13 x 303 x 203 ( = 0.51 x 11.93 x 7.99 in)
Battery
69.7 Wh Lithium-Ion
Operating System
Microsoft Windows 10 Home 64 Bit
Camera
Webcam: 0.9 MP, 16:9 (1280x720)
Additional features
Speakers: stereo, 2x 5W, Keyboard: chiclet, Keyboard Light: yes, 24 Months Warranty
Weight
1.16 kg ( = 40.92 oz / 2.56 pounds), Power Supply: 251 g ( = 8.85 oz / 0.55 pounds)
Price
1600 Euro
Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

 

Rating
Date
Model
Weight
Height
Size
Resolution
Best Price
84 %
07/2020
Samsung Galaxy Book Flex 13.3
i5-1035G4, Iris Plus Graphics G4 (Ice Lake 48 EU)
1.2 kg13 mm13.3"1920x1080
89 %
09/2019
Dell Latitude 7200
i5-8365U, UHD Graphics 620
1.2 kg9.35 mm12.3"1920x1280
88 %
11/2019
Microsoft Surface Pro 7 Core i5-1035G4
i5-1035G4, Iris Plus Graphics G4 (Ice Lake 48 EU)
775 g8.5 mm12.3"2736x1824
85 %
07/2020
Fujitsu Lifebook U939X
i5-8265U, UHD Graphics 620
1 kg17 mm13.3"1920x1080
88 %
10/2019
Lenovo Yoga C940-14IIL
i7-1065G7, Iris Plus Graphics G7 (Ice Lake 64 EU)
1.4 kg14.95 mm14"1920x1080

Case - Galaxy Book made of aluminum

Samsung has given the Galaxy Book Flex 13.3 a high-quality aluminum case. It's very robust and has a clean finish. The same applies to the hinges, which hold the display firmly in place. If the screen is folded into tablet mode, the maximum folding position is somewhat loose. As a result, the screen and base tend to slightly drift apart, which makes it a bit difficult to use the Galaxy Book Flex 13.3 as a tablet.

Samsung Galaxy Book Flex 13.3
Samsung Galaxy Book Flex 13.3
Samsung Galaxy Book Flex 13.3
Samsung Galaxy Book Flex 13.3
Samsung Galaxy Book Flex 13.3
Samsung Galaxy Book Flex 13.3
Samsung Galaxy Book Flex 13.3

The Samsung convertible's dimensions place the Galaxy Flex 13.3 in the middle of our test field. Large differences compared to other 13-inch tablets aren't noticeable here. However, devices like the Microsoft Surface Pro 7 and the Fujitsu Lifebook U939X make tablet operation easier due to their significantly lower weight.

Size comparison

320.3 mm / 12.6 inch 215.6 mm / 8.49 inch 14.95 mm / 0.589 inch 1.4 kg3.09 lbs309 mm / 12.2 inch 215 mm / 8.46 inch 17 mm / 0.669 inch 1 kg2.26 lbs303 mm / 11.9 inch 203 mm / 7.99 inch 13 mm / 0.512 inch 1.2 kg2.56 lbs292 mm / 11.5 inch 208.8 mm / 8.22 inch 9.35 mm / 0.3681 inch 1.2 kg2.6 lbs292 mm / 11.5 inch 201 mm / 7.91 inch 8.5 mm / 0.3346 inch 775 g1.709 lbs

Connectivity - Windows convertible with 2x Thunderbolt 3

The Samsung Galaxy Book Flex doesn't offer any classic USB Type-A connections. Aside from the USB Type-C port, which is also used for charging, there are two Thunderbolt ports. With these, any desired ports can be reproduced, but you need to have the corresponding adapters for this.

Left side: 3.5 mm headset connection, 1x USB Type-C 3.0 (also serves as power supply), microSD card slot
Left side: 3.5 mm headset connection, 1x USB Type-C 3.0 (also serves as power supply), microSD card slot
Right side: power button, 2x Thunderbolt 3, S Pen
Right side: power button, 2x Thunderbolt 3, S Pen

SD card reader

The Galaxy Book Flex 13.3 allows the use of microSD cards, which are stored in a slot on the side. However, it can only be opened with a tool, which unnecessarily complicates the frequent swapping of cards. The card reader itself reaches 78.4 MB/s for copying and 88.3 MB/s for reading data with our Toshiba Exceria Pro M501 reference memory card. These rates are slightly above average, but other Windows convertibles achieve even better speeds.

SDCardreader Transfer Speed
average JPG Copy Test (av. of 3 runs)
Dell Latitude 7200
  (Toshiba Exceria Pro M501 64 GB UHS-II)
177 MB/s ∼100% +126%
Fujitsu Lifebook U939X
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
154 MB/s ∼87% +96%
Samsung Galaxy Book Flex 13.3
  (Toshiba Exceria Pro M501 microSDXC 64GB)
78.4 MB/s ∼44%
Microsoft Surface Pro 7 Core i5-1035G4
  (Toshiba Exceria Pro M501 64 GB UHS-II)
73 MB/s ∼41% -7%
Average of class Convertible
  (7.5 - 197, n=151)
64.1 MB/s ∼36% -18%
maximum AS SSD Seq Read Test (1GB)
Dell Latitude 7200
  (Toshiba Exceria Pro M501 64 GB UHS-II)
193.4 MB/s ∼100% +119%
Fujitsu Lifebook U939X
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
183.7 MB/s ∼95% +108%
Samsung Galaxy Book Flex 13.3
  (Toshiba Exceria Pro M501 microSDXC 64GB)
88.3 MB/s ∼46%
Microsoft Surface Pro 7 Core i5-1035G4
  (Toshiba Exceria Pro M501 64 GB UHS-II)
85.07 MB/s ∼44% -4%
Average of class Convertible
  (19.2 - 246, n=146)
79.6 MB/s ∼41% -10%

Communication

Users can connect wirelessly via Bluetooth 5.0 and establish Wi-Fi 6 (802.11ax) network connections with the Samsung convertible. With our Netgear Nighthawk AX12 reference router, we achieve good speeds of 857 Mb/s on average for receiving data and 625 Mb/s for sending data.

Networking
iperf3 Client (receive) TCP 1 m 4M x10
Average Intel Wi-Fi 6 AX201
  (289 - 1722, n=61)
1153 MBit/s ∼100% +35%
Samsung Galaxy Book Flex 13.3
Intel Wi-Fi 6 AX201
857 (min: 782, max: 887) MBit/s ∼74%
Fujitsu Lifebook U939X
Intel Wireless-AC 9560
649 (min: 586, max: 678) MBit/s ∼56% -24%
Lenovo Yoga C940-14IIL
Intel Wi-Fi 6 AX201
635 MBit/s ∼55% -26%
Dell Latitude 7200
Intel Wireless-AC 9560
605 MBit/s ∼52% -29%
Average of class Convertible
  (28.7 - 1470, n=171)
544 MBit/s ∼47% -37%
iperf3 Client (transmit) TCP 1 m 4M x10
Average Intel Wi-Fi 6 AX201
  (49.8 - 1666, n=61)
1015 MBit/s ∼100% +62%
Lenovo Yoga C940-14IIL
Intel Wi-Fi 6 AX201
743 MBit/s ∼73% +19%
Fujitsu Lifebook U939X
Intel Wireless-AC 9560
630 (min: 329, max: 668) MBit/s ∼62% +1%
Samsung Galaxy Book Flex 13.3
Intel Wi-Fi 6 AX201
625 (min: 543, max: 707) MBit/s ∼62%
Dell Latitude 7200
Intel Wireless-AC 9560
584 MBit/s ∼58% -7%
Average of class Convertible
  (36.4 - 1411, n=171)
536 MBit/s ∼53% -14%
0100200300400500600700800Tooltip
Samsung Galaxy Book Flex 13.3 Intel Wi-Fi 6 AX201; iperf3 Client (receive) TCP 1 m 4M x10; iperf 3.1.3: Ø856 (782-887)
Fujitsu Lifebook U939X Intel Wireless-AC 9560; iperf3 Client (receive) TCP 1 m 4M x10; iperf 3.1.3: Ø649 (586-678)
Samsung Galaxy Book Flex 13.3 Intel Wi-Fi 6 AX201; iperf3 Client (transmit) TCP 1 m 4M x10; iperf 3.1.3: Ø625 (543-707)
Fujitsu Lifebook U939X Intel Wireless-AC 9560; iperf3 Client (transmit) TCP 1 m 4M x10; iperf 3.1.3: Ø618 (329-668)

Webcam

The webcam in the Galaxy Book Flex has a low resolution of 0.9 MP. Our test chart is, therefore, only reproduced with moderate quality even under good lighting conditions and only shows blurry details. However, the image quality is sufficient for simple video chats. The photo of the ColorChecker Passport also shows that colors are captured much brighter than they should be.

ColorChecker
39.4 ∆E
28 ∆E
37.3 ∆E
36.7 ∆E
35.6 ∆E
29.2 ∆E
36.7 ∆E
46.6 ∆E
39 ∆E
41.9 ∆E
28.6 ∆E
24.5 ∆E
44.5 ∆E
28.5 ∆E
37.5 ∆E
24.5 ∆E
39.3 ∆E
29.6 ∆E
2.3 ∆E
11.8 ∆E
22.8 ∆E
34.4 ∆E
39.4 ∆E
22.2 ∆E
ColorChecker Samsung Galaxy Book Flex 13.3: 31.67 ∆E min: 2.33 - max: 46.58 ∆E
ColorChecker
19 ∆E
18.9 ∆E
20.4 ∆E
16 ∆E
19.7 ∆E
14.7 ∆E
15.3 ∆E
25.8 ∆E
20.4 ∆E
14.9 ∆E
12.7 ∆E
10.6 ∆E
15.9 ∆E
12.1 ∆E
22.8 ∆E
7.8 ∆E
18.6 ∆E
14.4 ∆E
1.9 ∆E
10.6 ∆E
10.6 ∆E
9.3 ∆E
5.1 ∆E
6.1 ∆E
ColorChecker Fujitsu Lifebook U939X: 14.31 ∆E min: 1.87 - max: 25.83 ∆E

Security

Samsung equips the Galaxy Book Flex 13.3 with a fingerprint scanner. It can be set up quickly via Windows Hello, and it unlocked the system reliably at all times during our test. However, the setup of face recognition is not supported.

Accessories

Included with the Windows convertible from Samsung is a USB Type-C power adapter and the S Pen. Other general accessories can also be found on the manufacturer's website.

Maintenance

The rubber feet of the Galaxy Book 13.3 are only inserted in their place and can be easily removed by the user without causing damage. Once the screws underneath have been loosened, the bottom cover can be gradually removed from the retaining brackets with a little caution. Inside, you'll get access to the SSD, which is the only component that can be replaced.

Samsung Galaxy Book Flex 13.3 - Rubber feet
Samsung Galaxy Book Flex 13.3 - Rubber feet
Samsung Galaxy Book Flex 13.3 - Maintenance
Samsung Galaxy Book Flex 13.3 - Maintenance

Warranty

Samsung grants buyers of the Galaxy Book Flex 13.3 a warranty period of 24 months.

Input devices - More-accurate touchscreen and good keyboard

Keyboard

The keys of the Samsung Galaxy Book Flex 13.3 are very flat, but they offer a pleasant pressure point with clear feedback. The keyboard is quiet when typing and the labeling is also easy to read without the three-level backlight. The latter illuminates the keys evenly and without glare. While the "Insert" and "Del" keys are separated, Samsung places "Home", "End", and "Pg Up/Pg Down" as secondary functions on the somewhat small arrow keys.

Touchpad

Samsung uses a ClickPad as mouse replacement, and the mouse pointer can be navigated very well with it. The surface hardly offers any resistance to the fingertips, which also makes drag-and-drop movements effortless. Mouse clicks triggered by mechanical pressure are recognized with a clearly noticeable pressure point and an audible noise.

The Galaxy Book Flex's touchscreen also reacts very precisely to input, but it can be operated considerably better with the included S Pen. In our test, different pressure levels were recognized without issues too.

Samsung Galaxy Book Flex 13.3 - ClickPad
Samsung Galaxy Book Flex 13.3 - ClickPad
Samsung Galaxy Book Flex 13.3 - Keyboard
Samsung Galaxy Book Flex 13.3 - Keyboard
Samsung Galaxy Book Flex 13.3 - Backlighting
Samsung Galaxy Book Flex 13.3 - Backlighting

Display - No PWM and high brightness

Subpixel grid
Subpixel grid
Screen bleeding
Screen bleeding

The display in the Galaxy Book Flex 13.3 consists of a 13.3-inch IPS panel and offers a resolution of 1920x1080 pixels. The average brightness is around 434 cd/m², but we could also measure up to 569 cd/m² on battery power. Consequently, the Windows convertible reaches one of the top places in our test field but scores somewhat worse than the competition with a brightness distribution of 86%.

PWM is not used for brightness control so that even users with sensitive eyes don't have to fear any difficulties when using the Galaxy Book Flex 13.3. Calibrating the display and creating a color profile was not possible on the Galaxy Book Flex 13.3 because the spectrophotometer was not recognized.

438
cd/m²
431
cd/m²
427
cd/m²
441
cd/m²
473
cd/m²
422
cd/m²
434
cd/m²
431
cd/m²
407
cd/m²
Distribution of brightness
BOE087A
X-Rite i1Pro 2
Maximum: 473 cd/m² Average: 433.8 cd/m² Minimum: 29 cd/m²
Brightness Distribution: 86 %
Center on Battery: 569 cd/m²
Contrast: 1213:1 (Black: 0.39 cd/m²)
ΔE Color 5.18 | 0.6-29.43 Ø5.8
ΔE Greyscale 7.04 | 0.64-98 Ø6.1
Gamma: 2.35
Samsung Galaxy Book Flex 13.3
BOE087A, IPS, 1920x1080, 13.3
Dell Latitude 7200
SHP14A3 LQ123N1, IPS LED, 1920x1280, 12.3
Microsoft Surface Pro 7 Core i5-1035G4
LG Philips LP123WQ112604, IPS, 2736x1824, 12.3
Fujitsu Lifebook U939X
Sharp SHP14B0, IPS, 1920x1080, 13.3
Lenovo Yoga C940-14IIL
LP140WF9-SPE2, IPS LED, 1920x1080, 14
Response Times
-24%
12%
-23%
-12%
Response Time Grey 50% / Grey 80% *
44 (19, 15)
52 (26, 26)
-18%
34.8 (16.8, 18)
21%
54.4 (26.8, 27.6)
-24%
49.6 (23.6, 26)
-13%
Response Time Black / White *
27 (15, 12)
34.8 (18.4, 16.4)
-29%
26.4 (13.2, 13.2)
2%
32.8 (16.4, 16.4)
-21%
30 (16.4, 13.6)
-11%
PWM Frequency
1645 (25)
21550 (24)
Screen
29%
3%
9%
28%
Brightness middle
473
401
-15%
480.4
2%
325
-31%
384
-19%
Brightness
434
385
-11%
485
12%
310
-29%
363
-16%
Brightness Distribution
86
88
2%
91
6%
89
3%
90
5%
Black Level *
0.39
0.28
28%
0.48
-23%
0.29
26%
0.17
56%
Contrast
1213
1432
18%
1001
-17%
1121
-8%
2259
86%
Colorchecker DeltaE2000 *
5.18
1.8
65%
5
3%
3.2
38%
3.5
32%
Colorchecker DeltaE2000 max. *
10.01
3.4
66%
7.72
23%
6.2
38%
5.5
45%
Greyscale DeltaE2000 *
7.04
1.6
77%
5.9
16%
4.4
37%
4.6
35%
Gamma
2.35 94%
2.14 103%
2.38 92%
2.21 100%
2.32 95%
CCT
6753 96%
6702 97%
7805 83%
7430 87%
6884 94%
Colorchecker DeltaE2000 calibrated *
1.1
2.44
1.1
1
Color Space (Percent of AdobeRGB 1998)
66.6
60.3
62.9
62
Color Space (Percent of sRGB)
99.4
93.2
96.6
97.7
Total Average (Program / Settings)
3% / 18%
8% / 5%
-7% / 3%
8% / 20%

* ... smaller is better

Our measurements show that the Galaxy Book Flex has a good contrast ratio of 1,213:1 and a slightly increased black value of 0.39 cd/m². As a result, colors are well separated from each other, but black image contents show a slight gray fogging. The CalMAN analysis also indicates that colors in the "Automatic QLED Mode" profile of the Samsung settings are displayed with a slight green tint. In addition to this profile, there are other preconfigured modes to chose from that can be used to influence the color reproduction. 

CalMAN - Color accuracy
CalMAN - Color accuracy
CalMAN - Grayscales
CalMAN - Grayscales
CalMAN - Saturation
CalMAN - Saturation
Samsung Galaxy Book Flex 13.3 - Outdoor use
Samsung Galaxy Book Flex 13.3 - Outdoor use
Samsung Galaxy Book Flex 13.3 - Outdoor use
Samsung Galaxy Book Flex 13.3 - Outdoor use

Outdoors, the reflectiveness of the Galaxy Book Flex 13.3's screen isn't as strong as in other convertibles with a glass display surface. In combination with the good brightness value, the device can also be used well on brighter days. Users can also activate a mode called "Outdoor+", which increases the brightness significantly.

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
27 ms ... rise ↗ and fall ↘ combined↗ 15 ms rise
↘ 12 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. » 54 % of all devices are better.
This means that the measured response time is similar to the average of all tested devices (24.6 ms).
       Response Time 50% Grey to 80% Grey
44 ms ... rise ↗ and fall ↘ combined↗ 19 ms rise
↘ 15 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. » 64 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (39 ms).

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 not detected

In comparison: 51 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 17916 (minimum: 5 - maximum: 2500000) Hz was measured.

The Galaxy Book's IPS panel has very stable viewing angles. Image content can be viewed from almost any angle without becoming distorted or displaying the wrong colors.

Viewing-angle stability
Viewing-angle stability

Performance - The Samsung Galaxy Book Flex is versatile

The performance of the Galaxy Book Flex 13.3 is aimed at office users and creative professionals who don't need a strong graphics card for their work. Both the CPU used here and its integrated graphics unit are the only options Samsung offers. If you want a better system performance, you'll have to take a look at the larger 15-inch model, which offers an Intel Core i7-1065G7 CPU as well as an Nvidia GeForce MX250 GPU.

Processor

Samsung uses the Intel Core i5-1035G4 quad-core processor in the Galaxy Book Flex 13.3. It can process up to eight tasks simultaneously and offers clock rates between 1.1 and 3.7 GHz. How long high frequencies can be maintained depends largely on the built-in cooling system.

Our Cinebench R15 continuous load loop shows that the CPU starts running at a slightly below-average rate; the performance then drops by about 24% as the test continues. In the other CPU-heavy benchmarks, the results of the i5-1035G4 are sometimes above and sometimes below the average of all the devices that we've tested with this CPU; therefore, the convertible is able to use its performance to a reasonable extent.

Samsung Galaxy Book Flex 13.3 - CPU-Z
Samsung Galaxy Book Flex 13.3 - CPU-Z
Samsung Galaxy Book Flex 13.3 - CPU-Z
Samsung Galaxy Book Flex 13.3 - CPU-Z
Samsung Galaxy Book Flex 13.3 - GPU-Z
Samsung Galaxy Book Flex 13.3 - HWiNFO
 
 
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Samsung Galaxy Book Flex 13.3 Intel Core i5-1035G4, Intel Core i5-1035G4: Ø442 (415.92-573.64)
Dell Latitude 7200 Intel Core i5-8365U, Intel Core i5-8365U: Ø519 (509.77-619.48)
Microsoft Surface Pro 7 Core i5-1035G4 Intel Core i5-1035G4, Intel Core i5-1035G4: Ø518 (495.42-684.65)
Fujitsu Lifebook U939X Intel Core i5-8265U, Intel Core i5-8265U: Ø492 (486.03-559.89)
Lenovo Yoga C940-14IIL Intel Core i7-1065G7, Intel Core i7-1065G7; Performance Mode: Ø702 (693.71-740.11)
Lenovo Yoga C940-14IIL Intel Core i7-1065G7, Intel Core i7-1065G7: Ø672 (659-720)
Cinebench R20: CPU (Single Core) | CPU (Multi Core)
Cinebench R15: CPU Single 64Bit | CPU Multi 64Bit
Blender 2.79: BMW27 CPU
7-Zip 18.03: 7z b 4 -mmt1 | 7z b 4
Geekbench 5.1 / 5.2: 64 Bit Single-Core Score | 64 Bit Multi-Core Score
HWBOT x265 Benchmark v2.2: 4k Preset
LibreOffice : 20 Documents To PDF
R Benchmark 2.5: Overall mean
Cinebench R20 / CPU (Single Core) - CPU (Single Core)
Microsoft Surface Pro 7 Core i5-1035G4
Intel Core i5-1035G4
441 Points ∼100% +6%
Dell Latitude 7200
Intel Core i5-8365U
419 Points ∼95% 0%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4
417 Points ∼95%
Average Intel Core i5-1035G4
  (357 - 441, n=5)
402 Points ∼91% -4%
Fujitsu Lifebook U939X
Intel Core i5-8265U
397 Points ∼90% -5%
Average of class Convertible
  (78 - 496, n=45)
356 Points ∼81% -15%
Cinebench R20 / CPU (Multi Core) - CPU (Multi Core)
Dell Latitude 7200
Intel Core i5-8365U
1430 Points ∼100% +18%
Microsoft Surface Pro 7 Core i5-1035G4
Intel Core i5-1035G4
1410 Points ∼99% +17%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4
1210 Points ∼85%
Average Intel Core i5-1035G4
  (892 - 1648, n=5)
1210 Points ∼85% 0%
Average of class Convertible
  (200 - 2530, n=45)
1171 Points ∼82% -3%
Fujitsu Lifebook U939X
Intel Core i5-8265U
1148 Points ∼80% -5%
Cinebench R15 / CPU Single 64Bit - CPU Single 64Bit
Lenovo Yoga C940-14IIL
Intel Core i7-1065G7
179 Points ∼100% +9%
Microsoft Surface Pro 7 Core i5-1035G4
Intel Core i5-1035G4
172 Points ∼96% +5%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4
164.58 Points ∼92%
Dell Latitude 7200
Intel Core i5-8365U
164 Points ∼92% 0%
Average Intel Core i5-1035G4
  (146 - 172, n=4)
163 Points ∼91% -1%
Fujitsu Lifebook U939X
Intel Core i5-8265U
159 Points ∼89% -3%
Average of class Convertible
  (19 - 197, n=332)
110 Points ∼61% -33%
Cinebench R15 / CPU Multi 64Bit - CPU Multi 64Bit
Lenovo Yoga C940-14IIL
Intel Core i7-1065G7
740 (min: 693, max: 740) Points ∼100% +29%
Lenovo Yoga C940-14IIL
Intel Core i7-1065G7
720 (min: 659, max: 720) Points ∼97% +26%
Microsoft Surface Pro 7 Core i5-1035G4
Intel Core i5-1035G4
644 Points ∼87% +12%
Dell Latitude 7200
Intel Core i5-8365U
620 (min: 509.77, max: 658) Points ∼84% +8%
Average Intel Core i5-1035G4
  (490 - 676, n=5)
584 Points ∼79% +2%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4
573 (min: 415.92, max: 573.64) Points ∼77%
Fujitsu Lifebook U939X
Intel Core i5-8265U
559 (min: 487.52, max: 492.16) Points ∼76% -2%
Average of class Convertible
  (33 - 938, n=341)
328 Points ∼44% -43%
Blender 2.79 / BMW27 CPU - BMW27 CPU
Average of class Convertible
  (605 - 5811, n=36)
1527 Seconds * ∼100% -42%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4
1074.5 Seconds * ∼70%
Average Intel Core i5-1035G4
  (703 - 1075, n=5)
942 Seconds * ∼62% +12%
Fujitsu Lifebook U939X
Intel Core i5-8265U
918 Seconds * ∼60% +15%
Microsoft Surface Pro 7 Core i5-1035G4
Intel Core i5-1035G4
900 Seconds * ∼59% +16%
Dell Latitude 7200
Intel Core i5-8365U
855 Seconds * ∼56% +20%
Lenovo Yoga C940-14IIL
Intel Core i7-1065G7
765 Seconds * ∼50% +29%
7-Zip 18.03 / 7z b 4 -mmt1 - 7z b 4 -mmt1
Lenovo Yoga C940-14IIL
Intel Core i7-1065G7
4431 MIPS ∼100% +7%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4
4125 MIPS ∼93%
Fujitsu Lifebook U939X
Intel Core i5-8265U
3962 MIPS ∼89% -4%
Dell Latitude 7200
Intel Core i5-8365U
3958 MIPS ∼89% -4%
Average of class Convertible
  (1307 - 5167, n=35)
3886 MIPS ∼88% -6%
Average Intel Core i5-1035G4
  (1307 - 4190, n=5)
3544 MIPS ∼80% -14%
Microsoft Surface Pro 7 Core i5-1035G4
Intel Core i5-1035G4
1307 MIPS ∼29% -68%
7-Zip 18.03 / 7z b 4 - 7z b 4
Lenovo Yoga C940-14IIL
Intel Core i7-1065G7
18289 MIPS ∼100% +42%
Dell Latitude 7200
Intel Core i5-8365U
16711 MIPS ∼91% +30%
Fujitsu Lifebook U939X
Intel Core i5-8265U
15564 MIPS ∼85% +21%
Average of class Convertible
  (3541 - 23237, n=36)
14732 MIPS ∼81% +15%
Average Intel Core i5-1035G4
  (11030 - 19548, n=5)
13911 MIPS ∼76% +8%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4
12865 MIPS ∼70%
Microsoft Surface Pro 7 Core i5-1035G4
Intel Core i5-1035G4
11030 MIPS ∼60% -14%
Geekbench 5.1 / 5.2 / 64 Bit Single-Core Score - 64 Bit Single-Core Score
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4
1277 Points ∼100%
Average Intel Core i5-1035G4
  (1081 - 1277, n=4)
1170 Points ∼92% -8%
Fujitsu Lifebook U939X
Intel Core i5-8265U
1040 Points ∼81% -19%
Average of class Convertible
  (233 - 1324, n=21)
925 Points ∼72% -28%
Geekbench 5.1 / 5.2 / 64 Bit Multi-Core Score - 64 Bit Multi-Core Score
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4
4250 Points ∼100%
Average Intel Core i5-1035G4
  (3261 - 4315, n=4)
3772 Points ∼89% -11%
Fujitsu Lifebook U939X
Intel Core i5-8265U
3681 Points ∼87% -13%
Average of class Convertible
  (770 - 4626, n=21)
3115 Points ∼73% -27%
HWBOT x265 Benchmark v2.2 / 4k Preset - 4k Preset
Lenovo Yoga C940-14IIL
Intel Core i7-1065G7
5.1 fps ∼100% +50%
Microsoft Surface Pro 7 Core i5-1035G4
Intel Core i5-1035G4
5.095 fps ∼100% +49%
Dell Latitude 7200
Intel Core i5-8365U
4.3 fps ∼84% +26%
Average Intel Core i5-1035G4
  (3.37 - 5.61, n=5)
4.17 fps ∼82% +22%
Fujitsu Lifebook U939X
Intel Core i5-8265U
4.01 fps ∼79% +18%
Average of class Convertible
  (0.58 - 6.7, n=37)
3.63 fps ∼71% +6%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4
3.41 fps ∼67%
LibreOffice / 20 Documents To PDF - 20 Documents To PDF
Average of class Convertible
  (53.7 - 238, n=16)
99.8 s ∼100% +67%
Average Intel Core i5-1035G4
  (58.4 - 78.3, n=4)
68.7 s ∼69% +15%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4
59.79 s ∼60%
Fujitsu Lifebook U939X
Intel Core i5-8265U
59.4 s ∼60% -1%
R Benchmark 2.5 / Overall mean - Overall mean
Average of class Convertible
  (0.629 - 2.74, n=18)
1.129 sec * ∼100% -52%
Average Intel Core i5-1035G4
  (0.716 - 0.825, n=4)
0.778 sec * ∼69% -4%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4
0.745 sec * ∼66%
Fujitsu Lifebook U939X
Intel Core i5-8265U
0.736 sec * ∼65% +1%

* ... smaller is better

Cinebench R15 CPU Single 64Bit
164.58 Points
Cinebench R15 CPU Multi 64Bit
573 Points
Cinebench R15 OpenGL 64Bit
52.5 fps
Cinebench R15 Ref. Match 64Bit
97.81 %
Help

System performance

In our test, the Galaxy Book Flex 13.3 refused to execute the PCMark 8 and 10 benchmarks. Both tests simply crashed after a short time without a visible error message. However, the Samsung convertible ran smoothly at all times in everyday testing and didn't show any micro-stuttering or the like. Programs were loaded quickly, and files were opened without any delays as well.

The performance achieved in our tests by laptops with similar hardware can be found in our CPU Benchmarks article.

DPC latencies

The Samsung Galaxy Book Flex 13.3 doesn't show increased interruption times and is, therefore, suitable for real-time applications.

Samsung Galaxy Book Flex 13.3 - LatencyMon (Main)
Samsung Galaxy Book Flex 13.3 - LatencyMon (Main)
Samsung Galaxy Book Flex 13.3 - LatencyMon (Drivers)
Samsung Galaxy Book Flex 13.3 - LatencyMon (Drivers)
DPC Latencies / LatencyMon - interrupt to process latency (max), Web, Youtube, Prime95
Samsung Galaxy Book Flex 13.3
Iris Plus Graphics G4 (Ice Lake 48 EU), i5-1035G4, Samsung SSD PM981a MZVLB256HBHQ
937.7 μs * ∼100%
Fujitsu Lifebook U939X
UHD Graphics 620, i5-8265U, Samsung SSD PM981 MZVLB512HAJQ
560.7 μs * ∼60% +40%

* ... smaller is better

Storage

The Samsung SSD installed here shows very good read and write speeds in our test. Although there are top models that still score a bit better, the storage device in use here is also very fast.

The performance of the SSD installed here compared to other storage devices can be found in our HDD/SSD Benchmarks article.

Samsung Galaxy Book Flex 13.3
Samsung SSD PM981a MZVLB256HBHQ
Dell Latitude 7200
WDC PC SN520 SDAPNUW-512G
Microsoft Surface Pro 7 Core i5-1035G4
Toshiba BG4 KBG40ZPZ256G
Fujitsu Lifebook U939X
Samsung SSD PM981 MZVLB512HAJQ
Lenovo Yoga C940-14IIL
Samsung SSD PM981 MZVLB512HAJQ
Average Samsung SSD PM981a MZVLB256HBHQ
 
CrystalDiskMark 5.2 / 6
-31%
-25%
-14%
-6%
-11%
Write 4K
157.9
131.9
-16%
118.5
-25%
158.5
0%
128.4
-19%
136 (87.2 - 170, n=9)
-14%
Read 4K
48.37
45.47
-6%
54.06
12%
47.62
-2%
46.37
-4%
43.5 (36 - 48.4, n=9)
-10%
Write Seq
2196
1021
-54%
1166
-47%
1573
-28%
1863
-15%
2169 (1761 - 2343, n=8)
-1%
Read Seq
2064
1085
-47%
1676
-19%
1411
-32%
2340
13%
2083 (1630 - 2436, n=8)
1%
Write 4K Q32T1
457
444.9
-3%
330.5
-28%
366.1
-20%
451.1
-1%
325 (208 - 457, n=9)
-29%
Read 4K Q32T1
513.5
366.6
-29%
393.1
-23%
451.9
-12%
415.3
-19%
367 (150 - 514, n=9)
-29%
Write Seq Q32T1
2354
1458
-38%
1569
-33%
1985
-16%
2985
27%
2296 (1896 - 2354, n=9)
-2%
Read Seq Q32T1
3557
1640
-54%
2390
-33%
3451
-3%
2565
-28%
3297 (2268 - 3569, n=9)
-7%
Write 4K Q8T8
437.2
451.4
208
Read 4K Q8T8
988.4
1004.4
383
AS SSD
3%
-254%
31%
20%
-7%
Score Total
2653
3142
18%
2157
-19%
4097
54%
3670
38%
2647 (1853 - 3685, n=9)
0%
Score Write
1214
1410
16%
475
-61%
1672
38%
1721
42%
1190 (648 - 1902, n=9)
-2%
Score Read
963
1155
20%
1133
18%
1627
69%
1322
37%
974 (733 - 1184, n=9)
1%
Access Time Write *
0.026
0.026
-0%
0.697
-2581%
0.027
-4%
0.029
-12%
0.0392 (0.025 - 0.085, n=9)
-51%
Access Time Read *
0.072
0.057
21%
0.066
8%
0.051
29%
0.052
28%
0.0653 (0.046 - 0.089, n=9)
9%
4K-64 Write
865.08
1183.25
37%
294.65
-66%
1341.75
55%
1461.29
69%
896 (282 - 1565, n=9)
4%
4K-64 Read
646.62
983.35
52%
923.75
43%
1301.29
101%
1010.39
56%
690 (508 - 903, n=9)
7%
4K Write
148.43
141.01
-5%
109.36
-26%
143.79
-3%
134.11
-10%
117 (78 - 148, n=9)
-21%
4K Read
52.7
42.52
-19%
50.7
-4%
53.88
2%
59.06
12%
49.5 (40.3 - 60.3, n=9)
-6%
Seq Write
2000.34
855.98
-57%
713.9
-64%
1864.31
-7%
1253
-37%
1771 (878 - 2187, n=9)
-11%
Seq Read
2637.35
1294.01
-51%
1589.92
-40%
2723.21
3%
2524.94
-4%
2346 (992 - 2980, n=9)
-11%
Total Average (Program / Settings)
-14% / -11%
-140% / -157%
9% / 12%
7% / 9%
-9% / -9%

* ... smaller is better

Samsung SSD PM981a MZVLB256HBHQ
CDM 5/6 Read Seq Q32T1: 3557 MB/s
CDM 5/6 Write Seq Q32T1: 2354 MB/s
CDM 5/6 Read 4K Q32T1: 513.5 MB/s
CDM 5/6 Write 4K Q32T1: 457 MB/s
CDM 5 Read Seq: 2064 MB/s
CDM 5 Write Seq: 2196 MB/s
CDM 5/6 Read 4K: 48.37 MB/s
CDM 5/6 Write 4K: 157.9 MB/s

Continuous load read: DiskSpd Read Loop, Queue Depth 8

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: Ø3314 (2251.39-3396.05)

Graphics card

The Intel Iris Plus Graphics G4 integrated graphics unit handles the rendering of image content in the Galaxy Book Flex 13.3. It is suitable for applications with a rather low demand on graphics performance, but in part, it performs significantly better than the older Intel UHD Graphics 620, for example. Since the GPU shares the memory with the CPU, the Iris Plus Graphics G4 benefits from RAM in a dual-channel configuration, which is how it's set up in this case.

The results of the 3DMark benchmarks are slightly above the average of other devices with this GPU. Our GPU Benchmarks article shows what performance can be expected in comparison to other graphics cards.

3DMark 11 - 1280x720 Performance GPU
Lenovo Yoga C940-14IIL
Intel Iris Plus Graphics G7 (Ice Lake 64 EU), Intel Core i7-1065G7
4613 Points ∼100% +42%
Samsung Galaxy Book Flex 13.3
Intel Iris Plus Graphics G4 (Ice Lake 48 EU), Intel Core i5-1035G4
3258 Points ∼71%
Microsoft Surface Pro 7 Core i5-1035G4
Intel Iris Plus Graphics G4 (Ice Lake 48 EU), Intel Core i5-1035G4
3228 Points ∼70% -1%
Average Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
  (1941 - 3258, n=5)
2892 Points ∼63% -11%
Dell Latitude 7200
Intel UHD Graphics 620, Intel Core i5-8365U
1802 Points ∼39% -45%
Fujitsu Lifebook U939X
Intel UHD Graphics 620, Intel Core i5-8265U
1711 Points ∼37% -47%
Average of class Convertible
  (173 - 17421, n=358)
1456 Points ∼32% -55%
3DMark
2560x1440 Time Spy Graphics
Lenovo Yoga C940-14IIL
Intel Iris Plus Graphics G7 (Ice Lake 64 EU), Intel Core i7-1065G7
835 Points ∼100% +28%
Samsung Galaxy Book Flex 13.3
Intel Iris Plus Graphics G4 (Ice Lake 48 EU), Intel Core i5-1035G4
652 Points ∼78%
Average Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
  (619 - 652, n=3)
639 Points ∼77% -2%
Microsoft Surface Pro 7 Core i5-1035G4
Intel Iris Plus Graphics G4 (Ice Lake 48 EU), Intel Core i5-1035G4
619 Points ∼74% -5%
Average of class Convertible
  (85 - 5126, n=56)
612 Points ∼73% -6%
1920x1080 Fire Strike Graphics
Lenovo Yoga C940-14IIL
Intel Iris Plus Graphics G7 (Ice Lake 64 EU), Intel Core i7-1065G7
3156 Points ∼100% +55%
Samsung Galaxy Book Flex 13.3
Intel Iris Plus Graphics G4 (Ice Lake 48 EU), Intel Core i5-1035G4
2041 Points ∼65%
Average Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
  (922 - 2230, n=5)
1880 Points ∼60% -8%
Average of class Convertible
  (132 - 13158, n=266)
1167 Points ∼37% -43%
Dell Latitude 7200
Intel UHD Graphics 620, Intel Core i5-8365U
1160 Points ∼37% -43%
3DMark 11 Performance
3513 points
3DMark Fire Strike Score
1922 points
3DMark Time Spy Score
741 points
Help

Gaming performance

The internal graphics unit of the Galaxy Book Flex 13.3 is only suitable for games to a limited extent. Users should restrict themselves to older or simple titles, whereby reduced graphics settings should also be preferred.

The gaming performance that can be expected from the Intel Iris Plus Graphics G4 can be found in our GPU Games article.

The Witcher 3
1366x768 Medium Graphics & Postprocessing
Lenovo Yoga C940-14IIL
Intel Core i7-1065G7, Intel Iris Plus Graphics G7 (Ice Lake 64 EU)
35.8 fps ∼100% +69%
Average of class Convertible
  (3.7 - 111, n=29)
27.1 fps ∼76% +28%
Microsoft Surface Pro 7 Core i5-1035G4
Intel Core i5-1035G4, Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
24.5 fps ∼68% +16%
Average Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
  (21.2 - 24.5, n=2)
22.9 fps ∼64% +8%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4, Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
21.2 fps ∼59%
1024x768 Low Graphics & Postprocessing
Lenovo Yoga C940-14IIL
Intel Core i7-1065G7, Intel Iris Plus Graphics G7 (Ice Lake 64 EU)
56 fps ∼100% +51%
Microsoft Surface Pro 7 Core i5-1035G4
Intel Core i5-1035G4, Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
39.4 fps ∼70% +6%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4, Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
37.2 fps ∼66%
Average of class Convertible
  (4.69 - 145, n=54)
30.3 fps ∼54% -19%
Average Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
  (9.1 - 39.4, n=3)
28.6 fps ∼51% -23%
Dell Latitude 7200
Intel Core i5-8365U, Intel UHD Graphics 620
16.4 fps ∼29% -56%
Fujitsu Lifebook U939X
Intel Core i5-8265U, Intel UHD Graphics 620
12.4 fps ∼22% -67%
X-Plane 11.11
1920x1080 med (fps_test=2)
Lenovo Yoga C940-14IIL
Intel Core i7-1065G7, Intel Iris Plus Graphics G7 (Ice Lake 64 EU)
20.7 fps ∼100% +44%
Average of class Convertible
  (3.48 - 62.9, n=32)
18.2 fps ∼88% +26%
Fujitsu Lifebook U939X
Intel Core i5-8265U, Intel UHD Graphics 620
17.2 fps ∼83% +19%
Dell Latitude 7200
Intel Core i5-8365U, Intel UHD Graphics 620
14.7 fps ∼71% +2%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4, Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
14.4 fps ∼70%
Average Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
  (9.32 - 14.4, n=4)
13 fps ∼63% -10%
1280x720 low (fps_test=1)
Lenovo Yoga C940-14IIL
Intel Core i7-1065G7, Intel Iris Plus Graphics G7 (Ice Lake 64 EU)
42.9 fps ∼100% +62%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4, Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
26.5 fps ∼62%
Fujitsu Lifebook U939X
Intel Core i5-8265U, Intel UHD Graphics 620
26.2 fps ∼61% -1%
Average of class Convertible
  (3.94 - 83.5, n=33)
25.3 fps ∼59% -5%
Average Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
  (17.8 - 26.5, n=4)
24.2 fps ∼56% -9%
Dell Latitude 7200
Intel Core i5-8365U, Intel UHD Graphics 620
22.1 fps ∼52% -17%
Dota 2 Reborn
1920x1080 high (2/3)
Lenovo Yoga C940-14IIL
Intel Core i7-1065G7, Intel Iris Plus Graphics G7 (Ice Lake 64 EU)
34.2 (min: 26.8) fps ∼100% +67%
Average of class Convertible
  (5.6 - 93.8, n=39)
22.5 fps ∼66% +10%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4, Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
20.5 (min: 17.2) fps ∼60%
Fujitsu Lifebook U939X
Intel Core i5-8265U, Intel UHD Graphics 620
20 (min: 18.6) fps ∼58% -2%
Dell Latitude 7200
Intel Core i5-8365U, Intel UHD Graphics 620
19.9 (min: 18.6) fps ∼58% -3%
Average Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
  (12.4 - 20.5, n=3)
15.9 fps ∼46% -22%
1366x768 med (1/3)
Lenovo Yoga C940-14IIL
Intel Core i7-1065G7, Intel Iris Plus Graphics G7 (Ice Lake 64 EU)
60 (min: 44.3) fps ∼100% +81%
Fujitsu Lifebook U939X
Intel Core i5-8265U, Intel UHD Graphics 620
44.1 (min: 40) fps ∼74% +33%
Dell Latitude 7200
Intel Core i5-8365U, Intel UHD Graphics 620
43.3 (min: 39) fps ∼72% +30%
Average of class Convertible
  (11.9 - 102, n=43)
40.3 fps ∼67% +21%
Average Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
  (23.4 - 41.6, n=5)
34.8 fps ∼58% +5%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4, Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
33.2 (min: 24.1) fps ∼55%
1280x720 min (0/3) fastest
Lenovo Yoga C940-14IIL
Intel Core i7-1065G7, Intel Iris Plus Graphics G7 (Ice Lake 64 EU)
101 (min: 89.5) fps ∼100% +80%
Dell Latitude 7200
Intel Core i5-8365U, Intel UHD Graphics 620
73 (min: 61.8) fps ∼72% +30%
Average Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
  (48.2 - 108, n=5)
70.2 fps ∼70% +25%
Fujitsu Lifebook U939X
Intel Core i5-8265U, Intel UHD Graphics 620
68.7 (min: 60.3) fps ∼68% +23%
Average of class Convertible
  (18.3 - 113, n=43)
63.3 fps ∼63% +13%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4, Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
56 (min: 50.4) fps ∼55%
Far Cry 5 - 1280x720 Low Preset AA:T
Average of class Convertible
  (1 - 78, n=10)
36.1 fps ∼100% +101%
Average Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
  (18 - 20, n=2)
19 fps ∼53% +6%
Samsung Galaxy Book Flex 13.3
Intel Core i5-1035G4, Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
18 fps ∼50%
low med. high ultra
The Witcher 3 (2015) 37.2 21.2 12.4 fps
Dota 2 Reborn (2015) 56 33.2 20.5 19.6 fps
X-Plane 11.11 (2018) 26.5 14.4 13.2 fps
Far Cry 5 (2018) 18 fps

Emissions - Annoying noises come from the power adapter

Noise emissions

Noise
Noise

The Samsung Galaxy Book's fans kick in frequently in daily use, but they run relatively quietly. However, you can still hear a uniform noise in very quiet environments, which can be annoying in the long run. In addition, the included power adapter emits a permanent noise in our test device.

Noise Level

Idle
30.7 / 30.7 / 30.7 dB(A)
Load
34.8 / 34.5 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: 30.7 dB(A)
dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2032.433.234.834.132.42535.738.534.133.635.73134.242.632.433.534.2403240.536.730.8325030.14231.33130.16329.630.728.728.629.68027.529.327.226.727.510025.727.826.72525.712525.827.125.82525.816024.224.924.223.824.220024.723.822.923.224.725023.323.522.323.223.331522.221.921.821.822.240021.721.420.620.321.750020.921.42019.720.963020.820.319.619.720.880020.72118.918.520.7100021.821.918.218.321.8125023.724.617.918.123.7160022.322.417.918.122.3200023.82418.118.123.8250024.82518.31824.8315024.524.718.218.524.5400022.723.118.318.522.7500020.820.818.518.520.8630019.619.818.618.619.6800019.119.118.518.619.11000018.818.918.618.618.81250018.718.718.51918.71600018.718.718.519.218.7SPL34.534.830.830.934.5N2.12.11.51.52.1median 22.2median 21.9median 18.6median 18.6median 22.2Delta1.821.71.51.8hearing rangehide median Fan NoiseSamsung Galaxy Book Flex 13.3

Temperature

Stress test
Stress test

Our measurements show that the small Windows convertible reaches surface temperatures of up to 41.6 °C (~107 °F). The Galaxy Book Flex feels warm but never gets too hot to be able to hold it in the hand, for example.

During our stress test, which lasted for about an hour, the core temperatures rose briefly to up to 99 °C (~210 °F). By the end of the test, these dropped to an average value of 75 °C (~167 °F), and the clock rates fell below the base clock speed of 1.1 GHz. After the end of the test, the system quickly stabilized again. Since the load caused by our stress-test scenario is almost impossible in practice, users don't have to expect limitations due to the temperatures being too high, though.

Max. Load
 39.2 °C
103 F
41.6 °C
107 F
39.6 °C
103 F
 
 32.5 °C
91 F
37.9 °C
100 F
36.9 °C
98 F
 
 30.4 °C
87 F
30.2 °C
86 F
32.4 °C
90 F
 
Maximum: 41.6 °C = 107 F
Average: 35.6 °C = 96 F
39.4 °C
103 F
40.6 °C
105 F
33.6 °C
92 F
38 °C
100 F
35.8 °C
96 F
32.1 °C
90 F
33.3 °C
92 F
32 °C
90 F
31 °C
88 F
Maximum: 40.6 °C = 105 F
Average: 35.1 °C = 95 F
Power Supply (max.)  39 °C = 102 F | Room Temperature 24.1 °C = 75 F | FIRT 550-Pocket
(±) The average temperature for the upper side under maximal load is 35.6 °C / 96 F, compared to the average of 30.3 °C / 87 F for the devices in the class Convertible.
(±) The maximum temperature on the upper side is 41.6 °C / 107 F, compared to the average of 35.3 °C / 96 F, ranging from 21.8 to 55.7 °C for the class Convertible.
(±) The bottom heats up to a maximum of 40.6 °C / 105 F, compared to the average of 36.5 °C / 98 F
(+) In idle usage, the average temperature for the upper side is 26.7 °C / 80 F, compared to the device average of 30.3 °C / 87 F.
(±) Playing The Witcher 3, the average temperature for the upper side is 34 °C / 93 F, compared to the device average of 30.3 °C / 87 F.
(+) The palmrests and touchpad are reaching skin temperature as a maximum (32.4 °C / 90.3 F) and are therefore not hot.
(-) The average temperature of the palmrest area of similar devices was 28.9 °C / 84 F (-3.5 °C / -6.3 F).
Heat development in idle usage - Top
Heat development in idle usage - Top
Heat development in idle usage - Bottom
Heat development in idle usage - Bottom
Heat development under load - Top
Heat development under load - Top
Heat development under load - Bottom
Heat development under load - Bottom
Heat development during our The Witcher 3 test - Top
Heat development during our The Witcher 3 test - Top
Heat development during our The Witcher 3 test - Bottom
Heat development during our The Witcher 3 test - Bottom

Speakers

Speakers
Speakers

The speakers of the Galaxy Book Flex 13.3 are relatively quiet and offer a sound spectrum tuned to the mids. Consequently, they are definitely suitable for playing media content in very quiet environments. In the long run, however, users should resort to external speakers or headphones.

dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2032.934.132.92534.133.634.13132.533.532.54031.330.831.35030.13130.1632828.6288027.426.727.410027.22527.212534.52534.516039.623.839.620042.723.242.725055.423.255.431560.421.860.440066.620.366.650067.119.767.163065.719.765.780069.118.569.1100067.618.367.6125065.318.165.3160068.718.168.7200071.618.171.62500681868315069.318.569.3400066.818.566.8500066.118.566.163006418.664800058.418.658.41000051.218.651.21250042.51942.51600040.619.240.6SPL79.430.979.4N45.21.545.2median 65.3median 18.6median 65.3Delta9.61.59.635.335.132.931.831.83236.535.132.428.93328.936.328.848.32761.52752.924.860.92462.822.763.32269.521.267.82174.82075.919.472.718.97117.770.117.86917.671.817.668.117.671.417.673.717.670.417.571.617.671.617.669.617.459.717.583.630.662.51.5median 69.6median 17.84.62.4hearing rangehide median Pink NoiseSamsung Galaxy Book Flex 13.3Apple MacBook 12 (Early 2016) 1.1 GHz
Frequency diagram (checkboxes can be checked and unchecked to compare devices)
Samsung Galaxy Book Flex 13.3 audio analysis

(-) | not very loud speakers (71.57 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 22% lower than median
(±) | linearity of bass is average (11.9% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 2.4% away from median
(+) | mids are linear (5.8% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 4.5% away from median
(±) | linearity of highs is average (7.1% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (21.4% difference to median)
Compared to same class
» 56% of all tested devices in this class were better, 6% similar, 38% worse
» The best had a delta of 11%, average was 22%, worst was 53%
Compared to all devices tested
» 51% of all tested devices were better, 9% similar, 40% worse
» The best had a delta of 3%, average was 21%, worst was 65%

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 20%, worst was 50%
Compared to all devices tested
» 2% of all tested devices were better, 0% similar, 98% worse
» The best had a delta of 3%, average was 21%, worst was 65%

Energy management - Moderate battery life

Energy consumption

Samsung Galaxy Book Flex 13.3 - Power adapter
Samsung Galaxy Book Flex 13.3 - Power adapter

The Samsung Galaxy Book 13.3 shows moderate power consumption with a maximum value of 40 watts. Because the laptop throttled its performance during our maximum load measurement, this value is lower than the average power consumption under load.

The output of the included power adapter is 65 watts; therefore, it has sufficient capacity to ensure a reliable power supply.

Power Consumption
Off / Standbydarklight 0.7 / 0.6 Watt
Idledarkmidlight 3.3 / 8.9 / 10.4 Watt
Load midlight 40 / 32 Watt
 color bar
Key: min: dark, med: mid, max: light        Metrahit Energy
Samsung Galaxy Book Flex 13.3
i5-1035G4, Iris Plus Graphics G4 (Ice Lake 48 EU), Samsung SSD PM981a MZVLB256HBHQ, IPS, 1920x1080, 13.3
Dell Latitude 7200
i5-8365U, UHD Graphics 620, WDC PC SN520 SDAPNUW-512G, IPS LED, 1920x1280, 12.3
Microsoft Surface Pro 7 Core i5-1035G4
i5-1035G4, Iris Plus Graphics G4 (Ice Lake 48 EU), Toshiba BG4 KBG40ZPZ256G, IPS, 2736x1824, 12.3
Fujitsu Lifebook U939X
i5-8265U, UHD Graphics 620, Samsung SSD PM981 MZVLB512HAJQ, IPS, 1920x1080, 13.3
Lenovo Yoga C940-14IIL
i7-1065G7, Iris Plus Graphics G7 (Ice Lake 64 EU), Samsung SSD PM981 MZVLB512HAJQ, IPS LED, 1920x1080, 14
Average Intel Iris Plus Graphics G4 (Ice Lake 48 EU)
 
Average of class Convertible
 
Power Consumption
4%
-27%
0%
-16%
6%
3%
Idle Minimum *
3.3
3.3
-0%
4.5
-36%
3.4
-3%
3.2
3%
3.23 (2.1 - 4.5, n=4)
2%
4.58 (1 - 23, n=407)
-39%
Idle Average *
8.9
5.8
35%
9.2
-3%
5.9
34%
7
21%
7.6 (6.1 - 9.2, n=4)
15%
7.74 (1.3 - 32.3, n=407)
13%
Idle Maximum *
10.4
6.5
37%
9.6
8%
9.2
12%
8.9
14%
8.85 (7 - 10.4, n=4)
15%
9.26 (1.8 - 61, n=407)
11%
Load Average *
40
37
7%
42
-5%
34.1
15%
47.6
-19%
33.1 (24.7 - 42, n=4)
17%
27.2 (1.4 - 94, n=405)
32%
Witcher 3 ultra *
28
Load Maximum *
32
51.3
-60%
63.5
-98%
50.5
-58%
63.1
-97%
38.4 (27.6 - 63.5, n=4)
-20%
33.1 (5.9 - 118, n=406)
-3%

* ... smaller is better

Battery life

In our practical WLAN test, the Galaxy Book Flex 13.3 achieves a runtime of 7:11 h. This is an averagely good value, but it should be considerably better, especially in view of the battery's capacity of almost 70 Wh.

Battery Runtime
Idle (without WLAN, min brightness)
11h 33min
NBC WiFi Websurfing Battery Test 1.3
7h 11min
Load (maximum brightness)
2h 38min
Samsung Galaxy Book Flex 13.3
i5-1035G4, Iris Plus Graphics G4 (Ice Lake 48 EU), 69.7 Wh
Dell Latitude 7200
i5-8365U, UHD Graphics 620, 38 Wh
Microsoft Surface Pro 7 Core i5-1035G4
i5-1035G4, Iris Plus Graphics G4 (Ice Lake 48 EU), 45 Wh
Fujitsu Lifebook U939X
i5-8265U, UHD Graphics 620, 50 Wh
Lenovo Yoga C940-14IIL
i7-1065G7, Iris Plus Graphics G7 (Ice Lake 64 EU), 60 Wh
Average of class Convertible
 
Battery Runtime
-18%
35%
45%
-6%
4%
Reader / Idle
693
1336
93%
793 (117 - 2223, n=305)
14%
WiFi v1.3
431
417
-3%
597
39%
627
45%
636
48%
462 (153 - 1010, n=282)
7%
Load
158
106
-33%
116
-27%
64
-59%
145 (49 - 677, n=304)
-8%

Pros

+ stable case
+ S Pen included
+ good keyboard
+ good touchscreen

Cons

- battery life could be better
- microSD card only removable with tool
- slightly elevated black value
- power adapter emits noises

Verdict - The Samsung Galaxy Book Flex 13.3 is a solid convertible

In review: Samsung Galaxy Book Flex 13.3. Test device provided by: Samsung Germany
In review: Samsung Galaxy Book Flex 13.3. Test device provided by: Samsung Germany

With the Galaxy Book Flex 13.3, Samsung delivers a very stable and visually appealing convertible. The screen isn't quite as good as we could observe with the Galaxy Book Ion 13.3, for example, but it's still one of the better ones of its kind. The touchscreen reacts very directly to touch input, and working with the included S Pen is also easy. The keyboard and ClickPad, which provide a pleasant feedback, deserve praise as well. The fact that the connectivity is a bit poor can also be easily overcome thanks to the two Thunderbolt 3 ports.

Buyers of the Samsung Galaxy Book Flex 13.3 get an appealing Windows convertible that is especially distinguished by its good input devices.

In the end, there are only minor aspects to criticize. One example is the fact that microSD cards are housed in a fixed slot that can only be removed with a special tool. This makes the frequent swapping of memory cards unnecessarily difficult. Also, the fact that the screen and the base don't lie completely flush with each other in tablet mode somewhat tarnishes the good overall impression. Convertibles like the Fujitsu Lifebook U939X or the Dell Latitude 7200 are a bit more user-friendly.

Samsung Galaxy Book Flex 13.3 - 07/20/2020 v7
Mike Wobker

Chassis
85 / 98 → 86%
Keyboard
83%
Pointing Device
95%
Connectivity
47 / 75 → 63%
Weight
73 / 20-75 → 97%
Battery
75%
Display
82%
Games Performance
55 / 78 → 71%
Application Performance
85 / 85 → 100%
Temperature
91%
Noise
91%
Audio
62 / 91 → 68%
Camera
27 / 85 → 32%
Average
73%
84%
Convertible - Weighted Average

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> Notebook / Laptop Reviews and News > Reviews > Galaxy Book Flex 13.3 in review: Samsung convertible with bright display
Mike Wobker, 2020-07-27 (Update: 2020-07-28)
Mike Wobker
Editor of the original article: Mike Wobker - Editor
I made my first IT walking attempts on a 386 with 4 MB of RAM. After that followed various PCs and notebooks, which I looked after and repaired in my circle of friends and acquaintances. After an apprenticeship as a telecommunications systems engineer and several years of professional experience, I graduated with a bachelor's degree in industrial engineering. Today I live out my fascination for IT, technology and mobile devices by writing test reports. In my free time I like to devote myself to vegan cooking and spend time with my family, which includes a whole range of animal roommates.