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Asus ZenBook Flip 15 (i7-8550U, GTX 1050, 4K, SSD, HDD) Convertible Review

Sebastian Bade, Tanja Hinum (translated by Sabrina Hartmann), 04/05/2018

Well-conceived convertible! The ZenBook Flip combines a multitude of devices into one. The suitability for gaming is no more a problem for the slim convertible than CPU-heavy applications are. This detailed review will show whether there is a catch somewhere.

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Convertibles are still in high demand for the end user. Especially Intel's new generation of processors boosts the performance noticeably by uniting four physical processing units into one ULV SoC. Users purchasing the new Asus ZenBook Flip 15 benefit from this performance boost as well and will be able to work at high speeds with the Intel Core i7-8550U. The remaining hardware is nothing to sneeze at either. The thin convertible offers sufficient storage space with its configuration consisting of an SSD (256 GB) and an HDD (2 TB). This storage space can be put to good use, since the convertible's good midrange GPU (Nvidia GeForce GTX 1050) enables the user to play even recent games. Furthermore, our test device is equipped with a 4K touchscreen. This much can be said right away: We really liked that screen. All things considered, the Asus ZenBook Flip 15 is a very good all-rounder. The purchase price of 1799 Euros is not to be neglected, though. Still, the laptop is of a high quality and has a robust build. Several useful additions complete the package. Sadly, very few alternative configurations are available. A model equipped with an FHD panel, as well as a model with a different storage solution are available online.

The stylish ZenBook Flip 15 has to compete with other current convertibles which can be found in the list below.

Acer Spin 5 HP Envy x360 15 Lenovo Yoga 720 HP Spectre x360 13t Lenovo ThinkPad X1 Yoga
CPU Intel Core i7-8550U AMD Ryzen 5 2500U Intel Core i7-7700HQ Intel Core i7-8550U Intel Core i7-7600U
GPU NVIDIA GeForce GTX 1050 AMD Radeon RX Vega 8 NVIDIA GeForce GTX 1050 Intel UHD Graphics 620 Intel HD Graphics 620
Display 15.6 inch 1920 x 1080 (IPS) 15.6 inch 1920 x 1080 (IPS) 15.6 inch 1920 x 1080 (IPS) 13.3 inch 1920 x 1080 (IPS) 14 inch 2560 x 1440 (IPS)
RAM 8 GB DDR4 8 GB DDR4 8 GB DDR4 16 GB DDR3 16 GB DDR3
Storage 256 GB SSD + 1 TB HDD 256 GB SSD 256 GB SSD 1024 GB SSD 1024 GB SSD
Rating 82% 80% 82% 88% 88%
Asus ZenBook Flip 15 UX561UD (ZenBook Flip 15 Series)
Graphics adapter
NVIDIA GeForce GTX 1050 (Laptop) - 2048 MB, Core: 1354 - 1493 MHz, Memory: 7000 MHz, GDDR5, Nvidia 382.53, Nvidia Optimus
Memory
16384 MB 
, DDR4-2400, 8GB soldered
Display
15.6 inch 16:9, 3840 x 2160 pixel 282 PPI, multi-touch, native pen support, B156ZAN03.1, IPS, glossy: yes
Mainboard
Intel Kaby Lake-U + iHDCP 2.2 Premium PCH
Storage
Micron 1100 MTFDDAV256TBN, 256 GB 
, M.2 2280 SSD + 2.5, 2180 GB free
Soundcard
Realtek High Definition Audio
Connections
2 USB 3.0 / 3.1 Gen1, 1 USB 3.1 Gen2, 1 Thunderbolt, 1 HDMI, Audio Connections: 3.5 mm audio combo, Card Reader: SD, Sensors: gyroscope
Networking
Realtek USB GBE Familiy Controller (10/100/1000MBit), Intel Dual Band Wireless-AC 8265 (a/b/g/n/ac), Bluetooth 4.1
Size
height x width x depth (in mm): 21 x 364 x 246 ( = 0.83 x 14.33 x 9.69 in)
Battery
52 Wh, 4550 mAh Lithium-Ion, 3-cell
Operating System
Microsoft Windows 10 Home 64 Bit
Camera
Webcam: FHD
Primary Camera: 2.1 MPix
Secondary Camera: IR+RGB combo camera
Additional features
Speakers: stereo, Keyboard: chiclet, Keyboard Light: yes, power supply, bag, stylus, USB-to-Ethernet adapter, Asus cable tie (hook-and-loop), ASUS Smart Gesture, ASUS Splendid, ASUS WebStorage Sync Agent, McAfee Internet Security (trial version), USB Charger+, 24 Months Warranty
Weight
2.055 kg ( = 72.49 oz / 4.53 pounds), Power Supply: 562 g ( = 19.82 oz / 1.24 pounds)
Price
1799 EUR
Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

 

Case - Asus ZenBook Meets Aluminum

The ZenBook's case is made almost entirely of aluminum. In terms of color, the case is mostly gray with chamfered edges providing subtle contrasts. The robust base plate was very convincing and could only be twisted with effort, and even then only minimally. The same is true for the display lid, which also had a good result in the pressure test, since we were unable to produce any ripples on our test device. The base unit did well in the pressure test, too. The only spot that yielded slightly was in the middle of the keyboard, but this is not too much of a problem. The two small but robust 360-degree hinges are able to transform the device into a tablet in an instant. In laptop mode, the two hinges offer ample support and they reduce any bouncing with vibrations to a minimum. The case cannot be opened with one hand because the hinges are a bit too stiff for that. Overall, the Asus ZenBook Flip 15 gives a high-quality impression, not only visually, but also tangibly. However, fingerprints tend to be visible very clearly on the convertible's surfaces. They can be easily removed with a soft cloth, though.

Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15
Asus ZenBook Flip 15 bag
Asus ZenBook Flip 15 bag

Size Comparison

The Asus ZenBook Flip 15 has a footprint of 364 x 246 millimeters, which is not overly much. The Lenovo ThinkPad X1 as well as the HP Spectre x360 are built in a way that makes them require less space, though. At 2.1 kilograms, the ZenBook's weight is still acceptable. Only the Acer Spin 5 is even heavier at 2.3 kilograms. The 120-watt power supply weighs an additional 562 grams, which makes it slightly heavier than the power supplies of the comparison devices which do not have a dedicated graphics card.

Connectivity - Asus Ultrabook Offers USB 3.1 Type-C Gen 2

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The connectivity of the Asus ZenBook Flip 15 is modern and offers everything a current convertible should have. In addition to the two USB 3.0 ports, a fast USB 3.1 Type-C Gen 2 port can be found on the opposite side of the device. There is also an HDMI output, enabling the user to easily connect an external monitor. The ports are well-positioned on the sides of the device and the power cable's angled connector does a good job at directing it to the back.

Left: ventilation slits, 1x USB 3.1 Type-C Gen 2, status LEDs, volume rocker, power-on switch
Left: ventilation slits, 1x USB 3.1 Type-C Gen 2, status LEDs, volume rocker, power-on switch
Right: SD card reader, 3.5 mm audio combo, 2x USB 3, HDMI 1.4, power input
Right: SD card reader, 3.5 mm audio combo, 2x USB 3, HDMI 1.4, power input
Back: ventilation slits
Back: ventilation slits
Front: no ports
Front: no ports

SD Card Reader

The memory card reader on the right side is able to process all common SD cards. Inserted storage media protrude clearly from the slot, though, which poses a risk of damage. We tested the card reader's performance with our reference card Toshiba Exceria Pro SDXC 64 GB UHS-II. At 35.5 MB/s, the Asus ZenBook Flip 15 had the second-lowest sequential read speed. Sadly, the ZenBook placed in one of the lower ranks for copying images as well because the memory card reader can only perform at USB 2.0 speed. These results put the Asus ZenBook Flip 15 clearly below average in the comparison field.

SDCardreader Transfer Speed
average JPG Copy Test (av. of 3 runs)
HP Spectre x360 13-ae048ng
  (Toshiba Exceria Pro M501 microSDXC 64GB)
157.2 MB/s ∼100% +396%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
  (Toshiba Exceria Pro M401)
76.3 MB/s ∼49% +141%
HP Envy x360 15-bq102ng
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
69.4 MB/s ∼44% +119%
Average of class Convertible
  (7.5 - 197, n=111)
58.9 MB/s ∼37% +86%
Asus ZenBook Flip 15 UX561UD
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
31.7 MB/s ∼20%
Acer Spin 5 SP515-51GN-80A3
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
22.5 MB/s ∼14% -29%
maximum AS SSD Seq Read Test (1GB)
HP Spectre x360 13-ae048ng
  (Toshiba Exceria Pro M501 microSDXC 64GB)
206.9 MB/s ∼100% +481%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
  (Toshiba Exceria Pro M401)
87.5 MB/s ∼42% +146%
HP Envy x360 15-bq102ng
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
82 MB/s ∼40% +130%
Average of class Convertible
  (24 - 246, n=109)
74.3 MB/s ∼36% +109%
Asus ZenBook Flip 15 UX561UD
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
35.6 MB/s ∼17%
Acer Spin 5 SP515-51GN-80A3
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
24 MB/s ∼12% -33%

Communication

The built-in Wi-Fi module
The built-in Wi-Fi module

The Intel Dual Band Wireless-AC 8265 module is responsible for the Wi-Fi communication and it also offers Bluetooth in the version 4.1. During our measurements, the Asus ZenBook Flip 15 achieved an average transfer rate of 666 MBit/s for data transmission and 461 MBit/s for data reception. The included USB-to-Ethernet adapter presents an additional possibility of network connectivity. It achieves data transfer rates of up to 1 GBit/s. We did not encounter any problems during our tests, neither with the Wi-Fi connection nor with the Ethernet connection.

Networking
iperf3 Client (receive) TCP 1 m 4M x10
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
Intel Dual Band Wireless-AC 8265
678 MBit/s ∼100% +47%
Lenovo Yoga 720-15IKB-80X7
Intel 8265 Tri-Band WiFi (Oak Peak) Network Adapter
662 MBit/s ∼98% +44%
HP Envy x360 15-bq102ng
Realtek RTL8822BE Wireless LAN 802.11ac PCIe Adapter
632 MBit/s ∼93% +37%
Acer Spin 5 SP515-51GN-80A3
Qualcomm Atheros QCA61x4
489 MBit/s ∼72% +6%
HP Spectre x360 13-ae048ng
Intel Dual Band Wireless-AC 8265
484 MBit/s ∼71% +5%
Average of class Convertible
  (38.3 - 678, n=123)
484 MBit/s ∼71% +5%
Asus ZenBook Flip 15 UX561UD
Intel Dual Band Wireless-AC 8265
461 MBit/s ∼68%
iperf3 Client (transmit) TCP 1 m 4M x10
HP Envy x360 15-bq102ng
Realtek RTL8822BE Wireless LAN 802.11ac PCIe Adapter
676 MBit/s ∼100% +2%
Asus ZenBook Flip 15 UX561UD
Intel Dual Band Wireless-AC 8265
666 MBit/s ∼99%
HP Spectre x360 13-ae048ng
Intel Dual Band Wireless-AC 8265
655 MBit/s ∼97% -2%
Acer Spin 5 SP515-51GN-80A3
Qualcomm Atheros QCA61x4
604 MBit/s ∼89% -9%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
Intel Dual Band Wireless-AC 8265
514 MBit/s ∼76% -23%
Lenovo Yoga 720-15IKB-80X7
Intel 8265 Tri-Band WiFi (Oak Peak) Network Adapter
512 MBit/s ∼76% -23%
Average of class Convertible
  (39.2 - 685, n=123)
490 MBit/s ∼72% -26%

Security

The Asus ZenBook Flip 15 is equipped with an infrared camera which supports Windows Hello. After adjusting the settings, the Windows login can be performed via facial recognition. This saves a bit of time and renders typing the password redundant. A Trusted Platform Module (TPM 2.0) is included as well and a trial version of McAfee Internet Security is installed on our test device.

Accessories

Scope of delivery of the Asus ZenBook Flip 15
Scope of delivery of the Asus ZenBook Flip 15

In comparison to other devices, purchasers of an Asus ZenBook Flip 15 receive ample accessories. Other than the convertible itself and its power supply, the box included a laptop bag as well as the aforementioned USB-to-Ethernet adapter and a stylus pen. Additionally, there was also a hook-and-loop cable tie to fixate the power supply's cables.

Maintenance

The Asus ZenBook Flip 15 without base plate
The Asus ZenBook Flip 15 without base plate

The lack of a maintenance hatch on the Asus ZenBook Flip 15 makes any kind of maintenance relatively complicated. The base plate can be removed, but it is not recommended to do so on this convertible without an adequate lever tool. The storage and the RAM can be exchanged or expanded, but all of the space inside our test device was already occupied, which made upgrades impossible.

Warranty

Asus offers a warranty of 24 months for the ZenBook Flip 15.

Input Devices - Asus ZenBook Flip with 4K Touchscreen

Keyboard

Asus ZenBook Flip 15 keyboard
Asus ZenBook Flip 15 keyboard
Asus ZenBook Flip 15 keyboard (backlit)
Asus ZenBook Flip 15 keyboard (backlit)

The chiclet keyboard of the Asus ZenBook Flip 15 looks tidy with a key size of 15 x 15 mm. The key surface is relatively smooth, but this does not make the keys any less comfortable to use. Overall, the keyboard gives a high-quality impression. The short key travel is accompanied by a clearly defined pressure point. The layout requires the arrow keys as well as the enter key of the numeric keypad to be slightly smaller than we find comfortable. This can quickly lead to typing errors, but after some time to get used to this, it should not pose much of a problem any longer. Asus equipped the chiclet keyboard with a white backlight with three brightness settings. The key noise is subtle and not disruptive at all.

Touchpad

Asus ZenBook Flip 15 touchpad
Asus ZenBook Flip 15 touchpad

The ClickPad installed in the Asus ZenBook Flip 15 has an input surface of 10.5 x 7.3 centimeters. The chamfered silvery edges are tangible because the smooth input surface has been recessed into the base slightly. The touchpad reacts to inputs promptly and without delay. The only inaccuracies we noticed with our test device were in the two lower corners. Overall, the input surface is sufficient and offers enough space even for multi-touch gestures. The two integrated buttons at the lower edge feature a short travel and produce a quiet clicking noise when used.

Touchscreen

Asus ZenBook Flip 15 touchscreen
Asus ZenBook Flip 15 touchscreen

The multi-touch screen as an additional input device worked well on our test device. We did not notice any inaccuracies. The included active stylus also worked flawlessly and it was fun to use, so this is a good way to unleash one's creativity.

Display - Asus ZenBook with UHD Panel

Subpixel structure
Subpixel structure
Minor screen bleeding at the display's lower edge
Minor screen bleeding at the display's lower edge

Asus equipped the ZenBook Flip 15 with a 4K IPS touchscreen. Alternatively, it is also available with a Full HD panel. Our test device's UHD panel achieved an average display brightness of 371 cd/m², placing the ZenBook Flip 15 at the top of the comparison field by far. The display brightness was still good even in battery mode. The brightness distribution is also still good at 87%, even though a value above 90% would have been desirable. The black value is not the 4K panel's strong point with a value that is a bit too high at 0.28, which makes the contrast suffer slightly in turn (1357:1). Thanks to the good display brightness, the contrast ratio is still relatively good, though. Our test device had some minor screen bleeding in the two lower corners, but it was not too disruptive. The Asus ZenBook Flip 15 variant with the 4K panel did not utilize PWM to regulate the display brightness.

361
cd/m²
401
cd/m²
390
cd/m²
353
cd/m²
380
cd/m²
378
cd/m²
348
cd/m²
373
cd/m²
354
cd/m²
Distribution of brightness
X-Rite i1Pro 2
Maximum: 401 cd/m² Average: 370.9 cd/m² Minimum: 20.4 cd/m²
Brightness Distribution: 87 %
Center on Battery: 383 cd/m²
Contrast: 1357:1 (Black: 0.28 cd/m²)
ΔE Color 4.38 | 0.4-29.43 Ø6.2
ΔE Greyscale 3.6 | 0.64-98 Ø6.4
100% sRGB (Argyll 3D) 88% AdobeRGB 1998 (Argyll 3D)
Gamma: 2.32
Asus ZenBook Flip 15 UX561UD
B156ZAN03.1, 3840x2160, 15.6
Acer Spin 5 SP515-51GN-80A3
AUO, B156HAN06.1, 1920x1080, 15.6
HP Envy x360 15-bq102ng
Chi Mei CM15E9, 1920x1080, 15.6
Lenovo Yoga 720-15IKB-80X7
Chi Mei CMN N156HCE-EN1, 1920x1080, 15.6
HP Spectre x360 13-ae048ng
Chi Mei (CMN1376), 1920x1080, 13.3
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
LEN4140, 2560x1440, 14
Response Times
10%
17%
26%
19%
91%
Response Time Grey 50% / Grey 80% *
52 (25, 27)
42 (22, 20)
19%
40 (22, 18)
23%
29.6 (15.6, 14)
43%
36 (18, 18)
31%
3.6 (1.6, 2)
93%
Response Time Black / White *
29 (15, 14)
29 (15, 13)
-0%
26 (14, 12)
10%
26.4 (15.6, 10.8)
9%
27 (13, 14)
7%
3.2 (2, 1.2)
89%
PWM Frequency
25000 (30)
25510 (69)
25000 (40)
240.4 (80)
Screen
-6%
-8%
-22%
-9%
-13%
Brightness middle
380
221
-42%
221
-42%
300.9
-21%
311
-18%
243
-36%
Brightness
371
224
-40%
207
-44%
285
-23%
278
-25%
240
-35%
Brightness Distribution
87
89
2%
87
0%
92
6%
82
-6%
95
9%
Black Level *
0.28
0.12
57%
0.15
46%
0.24
14%
0.2
29%
Contrast
1357
1842
36%
1473
9%
1254
-8%
1555
15%
Colorchecker DeltaE2000 *
4.38
4.12
6%
4.35
1%
5
-14%
3.98
9%
5.3
-21%
Colorchecker DeltaE2000 max. *
7.59
6.41
16%
8.98
-18%
10.2
-34%
8.48
-12%
8.9
-17%
Greyscale DeltaE2000 *
3.6
3.4
6%
3.09
14%
7
-94%
5.57
-55%
3.7
-3%
Gamma
2.32 95%
2.54 87%
2.23 99%
2.34 94%
2.51 88%
1.78 124%
CCT
6860 95%
6893 94%
6068 107%
6578 99%
7810 83%
6202 105%
Color Space (Percent of AdobeRGB 1998)
88
37
-58%
56
-36%
59
-33%
64
-27%
84.8
-4%
Color Space (Percent of sRGB)
100
58
-42%
86
-14%
90
-10%
99
-1%
100
0%
Total Average (Program / Settings)
2% / -3%
5% / -4%
2% / -14%
5% / -4%
39% / 8%

* ... smaller is better

Asus ZenBook Flip 15 vs. sRGB (100%)
Asus ZenBook Flip 15 vs. sRGB (100%)
Asus ZenBook Flip 15 vs. AdobeRGB (88%)
Asus ZenBook Flip 15 vs. AdobeRGB (88%)

The UHD panel has a very good image quality. We liked the color representation, especially when looking at photos. The measured DeltaE deviations are relatively low in factory settings, even though a recalibration promises an even better result. You can find the corresponding ICC profile above the comparison chart. Regarding the color-space coverage, the Asus ZenBook Flip 15 was extremely convincing with its values of 100% (sRGB) and 88% (AdobeRGB), which placed it ahead of the Lenovo ThinkPad X1 Yoga. This makes the convertible suitable for professional use as well.

CalMAN: grayscales (uncalibrated)
CalMAN: grayscales (uncalibrated)
CalMAN: ColorChecker (uncalibrated)
CalMAN: ColorChecker (uncalibrated)
CalMAN: color saturation (uncalibrated)
CalMAN: color saturation (uncalibrated)

Despite its good brightness values, the ZenBook Flip 15 does not stand a chance in bright sunlight. Even in the shade, the glossy display restricts the outdoor usability severely.

The Asus ZenBook Flip 15 in bright sunlight
The Asus ZenBook Flip 15 in bright sunlight
The Asus ZenBook Flip 15 in the shade
The Asus ZenBook Flip 15 in the shade

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
29 ms ... rise ↗ and fall ↘ combined↗ 15 ms rise
↘ 14 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. » 67 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (25.6 ms).
       Response Time 50% Grey to 80% Grey
52 ms ... rise ↗ and fall ↘ combined↗ 25 ms rise
↘ 27 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. » 86 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (41 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: 52 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 9265 (minimum: 43 - maximum: 142900) Hz was measured.

The 4K IPS panel had very good results in our viewing-angle test. The test image can be displayed really well from all positions. We did not notice any changes in color or any fogging effects with our test device.

The Asus ZenBook Flip 15 in the viewing-angle test
The Asus ZenBook Flip 15 in the viewing-angle test

Performance - Intel and Nvidia in the ZenBook Flip

The performance of the Asus ZenBook Flip 15 needs not fear comparison with its competitors. In opposite, thanks to its combination of a fast CPU and a good midrange graphics card, the convertible is able to keep up even with some gaming laptops. Overall, the Asus ZenBook Flip 15 in our test configuration offers ample performance. The DPC latencies show that the drivers work together really well, which ensures a smoothly running system. Especially the storage solution consisting of an SSD and an HDD is a very sensible combination, uniting speed with storage space. This is particularly useful for gaming.

 
 

Processor

Intel Core i7-8550U
Intel Core i7-8550U

The Intel Core i7-8550U is a very energy-efficient quad-core processor belonging to the Kaby Lake family. Despite its relatively low TDP of only 15 watts, the small SoC, which has been manufactured in a 14 nm process, offers four physical processing cores that in turn can process up to eight threads simultaneously. The quad-core processor's base clock speed is 1.8 GHz and it can be raised up to 4 GHz temporarily, depending on the load. To do so, the processor can draw up to 44 watts for a short time. The benchmarks show that the Intel Core i7-8550U performs really well in combination with the Asus ZenBook Flip 15, gaining our test sample the first place in the single-core test as well as the multi-core test.

Additional benchmarks for the Intel Core i7-8550U can be found here.

The Cinebench R15 Multi loop test shows clearly that the cooling unit is already pushing its limits after a short time of continuous load. Of the initial 761 points from our first run, only 701 remained in the second iteration. As the graphic shows, the rapid decline had not yet come to an end, though, with only barely 600 points for the third iteration. The value stabilized between 570 and 580 points in the further course of the test. To quantify this result, we witnessed a drop in performance of 24%. This disadvantage is not exactly a good thing, but in comparison to the HP Spectre x360, the Asus ZenBook Flip 15 still performs better under constant load than the Spectre did in a single run.

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Cinebench R15 CPU Multi 64 Bit
Cinebench R15
CPU Single 64Bit
Asus ZenBook Flip 15 UX561UD
Intel Core i7-8550U
171 Points ∼100%
Acer Spin 5 SP515-51GN-80A3
Intel Core i7-8550U
170 Points ∼99% -1%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
Intel Core i7-7600U
160 Points ∼94% -6%
Average Intel Core i7-8550U
  (108 - 172, n=73)
160 Points ∼94% -6%
HP Spectre x360 13-ae048ng
Intel Core i7-8550U
144 Points ∼84% -16%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
142 Points ∼83% -17%
Lenovo Yoga 720-15IKB-80X7
Intel Core i7-7700HQ
120 Points ∼70% -30%
Average of class Convertible
  (19 - 177, n=281)
103 Points ∼60% -40%
CPU Multi 64Bit
Asus ZenBook Flip 15 UX561UD
Intel Core i7-8550U
761 Points ∼100%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
618 Points ∼81% -19%
Lenovo Yoga 720-15IKB-80X7
Intel Core i7-7700HQ
603 Points ∼79% -21%
Average Intel Core i7-8550U
  (301 - 761, n=75)
571 Points ∼75% -25%
Acer Spin 5 SP515-51GN-80A3
Intel Core i7-8550U
558 Points ∼73% -27%
HP Spectre x360 13-ae048ng
Intel Core i7-8550U
501 Points ∼66% -34%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
Intel Core i7-7600U
373 Points ∼49% -51%
Average of class Convertible
  (33 - 761, n=288)
285 Points ∼37% -63%
Cinebench R11.5
CPU Single 64Bit
Asus ZenBook Flip 15 UX561UD
Intel Core i7-8550U
1.95 Points ∼100%
Acer Spin 5 SP515-51GN-80A3
Intel Core i7-8550U
1.94 Points ∼99% -1%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
Intel Core i7-7600U
1.85 Points ∼95% -5%
Average Intel Core i7-8550U
  (1.43 - 1.95, n=32)
1.834 Points ∼94% -6%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
1.61 Points ∼83% -17%
Lenovo Yoga 720-15IKB-80X7
Intel Core i7-7700HQ
1.36 Points ∼70% -30%
Average of class Convertible
  (0.24 - 2.01, n=215)
1.11 Points ∼57% -43%
CPU Multi 64Bit
Asus ZenBook Flip 15 UX561UD
Intel Core i7-8550U
8.56 Points ∼100%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
6.91 Points ∼81% -19%
Lenovo Yoga 720-15IKB-80X7
Intel Core i7-7700HQ
6.67 Points ∼78% -22%
Average Intel Core i7-8550U
  (4.38 - 8.56, n=32)
6.28 Points ∼73% -27%
Acer Spin 5 SP515-51GN-80A3
Intel Core i7-8550U
6.26 Points ∼73% -27%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
Intel Core i7-7600U
4.08 Points ∼48% -52%
Average of class Convertible
  (0.45 - 8.56, n=224)
2.77 Points ∼32% -68%
Cinebench R10
Rendering Single CPUs 64Bit
Asus ZenBook Flip 15 UX561UD
Intel Core i7-8550U
8397 Points ∼100%
Acer Spin 5 SP515-51GN-80A3
Intel Core i7-8550U
8359 Points ∼100% 0%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
Intel Core i7-7600U
8145 Points ∼97% -3%
Average Intel Core i7-8550U
  (6737 - 8436, n=12)
8065 Points ∼96% -4%
Average of class Convertible
  (919 - 8397, n=119)
4522 Points ∼54% -46%
Rendering Multiple CPUs 64Bit
Asus ZenBook Flip 15 UX561UD
Intel Core i7-8550U
31667 Points ∼100%
Acer Spin 5 SP515-51GN-80A3
Intel Core i7-8550U
23730 Points ∼75% -25%
Average Intel Core i7-8550U
  (12279 - 31667, n=12)
23153 Points ∼73% -27%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
Intel Core i7-7600U
16430 Points ∼52% -48%
Average of class Convertible
  (1689 - 31667, n=118)
9633 Points ∼30% -70%
JetStream 1.1 - Total Score
Acer Spin 5 SP515-51GN-80A3
Intel Core i7-8550U
286.26 Points ∼100% +15%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
Intel Core i7-7600U
266.14 Points ∼93% +7%
Asus ZenBook Flip 15 UX561UD
Intel Core i7-8550U
248.35 Points ∼87%
HP Spectre x360 13-ae048ng
Intel Core i7-8550U
244.3 Points ∼85% -2%
Average Intel Core i7-8550U
  (142 - 288, n=59)
234 Points ∼82% -6%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
193 Points ∼67% -22%
Average of class Convertible
  (33.5 - 288, n=159)
167 Points ∼58% -33%
Octane V2 - Total Score
Acer Spin 5 SP515-51GN-80A3
Intel Core i7-8550U
42043 Points ∼100% +17%
Asus ZenBook Flip 15 UX561UD
Intel Core i7-8550U
36079 Points ∼86%
Average Intel Core i7-8550U
  (17296 - 42043, n=38)
33497 Points ∼80% -7%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
Intel Core i7-7600U
31702 Points ∼75% -12%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
26832 Points ∼64% -26%
Average of class Convertible
  (3067 - 42822, n=167)
21076 Points ∼50% -42%
Mozilla Kraken 1.1 - Total Score
Average of class Convertible
  (809 - 9177, n=176)
2572 ms * ∼100% -143%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
1346.7 ms * ∼52% -27%
Average Intel Core i7-8550U
  (877 - 2114, n=43)
1090 ms * ∼42% -3%
Asus ZenBook Flip 15 UX561UD
Intel Core i7-8550U
1058.2 ms * ∼41%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
Intel Core i7-7600U
972.8 ms * ∼38% +8%
HP Spectre x360 13-ae048ng
Intel Core i7-8550U
946.5 ms * ∼37% +11%
Acer Spin 5 SP515-51GN-80A3
Intel Core i7-8550U
876.6 ms * ∼34% +17%

* ... smaller is better

Cinebench R10
Cinebench R10
Cinebench R11.5
Cinebench R11.5
Cinebench R15
Cinebench R15
Jetstream 1.1
Jetstream 1.1
Octane V2
Octane V2
Mozilla Kraken 1.1
Mozilla Kraken 1.1
Cinebench R10 Shading 32Bit
4243
Cinebench R10 Rendering Single CPUs 64Bit
8397 Points
Cinebench R10 Rendering Multiple CPUs 64Bit
31667 Points
Cinebench R10 Shading 64Bit
4868 Points
Cinebench R10 Rendering Single 32Bit
6506
Cinebench R10 Rendering Multiple CPUs 32Bit
24180
Cinebench R11.5 CPU Multi 32Bit
7.89 Points
Cinebench R11.5 OpenGL 32Bit
75.89 fps
Cinebench R11.5 CPU Single 64Bit
1.95 Points
Cinebench R11.5 CPU Multi 64Bit
8.56 Points
Cinebench R11.5 OpenGL 64Bit
73.44 fps
Cinebench R11.5 CPU Single 32Bit
1.73 Points
Cinebench R15 CPU Single 64Bit
171 Points
Cinebench R15 Ref. Match 64Bit
99.6 %
Cinebench R15 OpenGL 64Bit
109.89 fps
Cinebench R15 CPU Multi 64Bit
761 Points
Help

System Performance

Unfortunately, the really good CPU performance cannot be carried over to the system performance as a whole. The Asus ZenBook Flip 15 ranks in the midfield of the PCMark 8 benchmarks, which in itself does not necessarily imply a bad performance. The competitors simply scored a few percentage points more than our test sample. During our time of testing, we did not encounter any problems that would have cast doubt on the convertible's performance ability. Booting up the system is done within seconds and the Asus ZenBook Flip 15 can deal with running several programs at once.

PCMark 8 Home
PCMark 8 Home
PCMark 8 Work
PCMark 8 Work
PCMark 8 Storage
PCMark 8 Storage
PCMark 10
PCMark 10
PCMark 8
Work Score Accelerated v2
Acer Spin 5 SP515-51GN-80A3
GeForce GTX 1050 (Laptop), 8550U, Intel SSD 600p SSDPEKKW256G7
5281 Points ∼100% +20%
Average Intel Core i7-8550U, NVIDIA GeForce GTX 1050 (Laptop)
  (4382 - 5343, n=5)
4922 Points ∼93% +12%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
HD Graphics 620, 7600U, Samsung SSD PM961 1TB M.2 PCIe 3.0 x4 NVMe (MZVLW1T0)
4852 Points ∼92% +10%
Lenovo Yoga 720-15IKB-80X7
GeForce GTX 1050 (Laptop), 7700HQ, Samsung PM961 MZVLW256HEHP
4771 Points ∼90% +8%
HP Spectre x360 13-ae048ng
UHD Graphics 620, 8550U, Toshiba NVMe THNSN51T02DUK
4463 Points ∼85% +1%
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 (Laptop), 8550U, Micron 1100 MTFDDAV256TBN
4401 Points ∼83%
HP Envy x360 15-bq102ng
Vega 8, 2500U, Samsung PM961 MZVLW256HEHP
3800 Points ∼72% -14%
Average of class Convertible
  (1007 - 5281, n=211)
3654 Points ∼69% -17%
Home Score Accelerated v2
Acer Spin 5 SP515-51GN-80A3
GeForce GTX 1050 (Laptop), 8550U, Intel SSD 600p SSDPEKKW256G7
4100 Points ∼100% +13%
Average Intel Core i7-8550U, NVIDIA GeForce GTX 1050 (Laptop)
  (3505 - 4245, n=6)
3938 Points ∼96% +9%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
HD Graphics 620, 7600U, Samsung SSD PM961 1TB M.2 PCIe 3.0 x4 NVMe (MZVLW1T0)
3860 Points ∼94% +7%
Lenovo Yoga 720-15IKB-80X7
GeForce GTX 1050 (Laptop), 7700HQ, Samsung PM961 MZVLW256HEHP
3670 Points ∼90% +2%
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 (Laptop), 8550U, Micron 1100 MTFDDAV256TBN
3614 Points ∼88%
HP Spectre x360 13-ae048ng
UHD Graphics 620, 8550U, Toshiba NVMe THNSN51T02DUK
3605 Points ∼88% 0%
HP Envy x360 15-bq102ng
Vega 8, 2500U, Samsung PM961 MZVLW256HEHP
3462 Points ∼84% -4%
Average of class Convertible
  (741 - 4741, n=257)
2748 Points ∼67% -24%
PCMark 10
Productivity
Acer Spin 5 SP515-51GN-80A3
GeForce GTX 1050 (Laptop), 8550U, Intel SSD 600p SSDPEKKW256G7
6748 Points ∼100% +12%
Average Intel Core i7-8550U, NVIDIA GeForce GTX 1050 (Laptop)
  (5479 - 7171, n=6)
6527 Points ∼97% +8%
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 (Laptop), 8550U, Micron 1100 MTFDDAV256TBN
6024 Points ∼89%
Average of class Convertible
  (1121 - 7045, n=81)
5074 Points ∼75% -16%
HP Envy x360 15-bq102ng
Vega 8, 2500U, Samsung PM961 MZVLW256HEHP
3901 Points ∼58% -35%
Score
Average Intel Core i7-8550U, NVIDIA GeForce GTX 1050 (Laptop)
  (3835 - 4488, n=6)
4262 Points ∼100% 0%
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 (Laptop), 8550U, Micron 1100 MTFDDAV256TBN
4249 Points ∼100%
Acer Spin 5 SP515-51GN-80A3
GeForce GTX 1050 (Laptop), 8550U, Intel SSD 600p SSDPEKKW256G7
4194 Points ∼98% -1%
Average of class Convertible
  (872 - 4347, n=82)
3059 Points ∼72% -28%
HP Envy x360 15-bq102ng
Vega 8, 2500U, Samsung PM961 MZVLW256HEHP
2944 Points ∼69% -31%
PCMark 8 Home Score Accelerated v2
3614 points
PCMark 8 Work Score Accelerated v2
4401 points
Help

Storage Devices

M.2 SSD with 256 GB of storage space
M.2 SSD with 256 GB of storage space
2 TB HDD by Seagate
2 TB HDD by Seagate

The storage solution installed in our test device is a combination of a 256 GB SSD, which includes the operating system, and a 2 TB hard drive for other programs and for data. The Micron SSD is an M.2 2280 module, communicating at SATA speed. It had a good performance during our measurements, but it cannot compare to a much faster NVMe SSD. The 4K read value was good, never slipping below the 20 MB/s mark.

The second storage medium is a regular 2.5-inch hard drive with 2 TB of storage space, leaving the user with sufficient space for varied multimedia content. The Seagate hard drive works at 5400 rotations per minute and reached an average transfer rate of 105 MB/s in our test.

AS SSD
AS SSD
CrystalDiskMark 3 (SSD)
CrystalDiskMark 3 (SSD)
CrystalDiskMark 5 (SSD)
CrystalDiskMark 5 (SSD)
CrystalDiskInfo (SSD)
CrystalDiskInfo (SSD)
HD Tune
HD Tune
CrystalDiskMark 3 (HDD)
CrystalDiskMark 3 (HDD)
CrystalDiskMark 5 (HDD)
CrystalDiskMark 5 (HDD)
CrystalDiskInfo (HDD)
CrystalDiskInfo (HDD)
Asus ZenBook Flip 15 UX561UD
Micron 1100 MTFDDAV256TBN
Acer Spin 5 SP515-51GN-80A3
Intel SSD 600p SSDPEKKW256G7
HP Envy x360 15-bq102ng
Samsung PM961 MZVLW256HEHP
Lenovo Yoga 720-15IKB-80X7
Samsung PM961 MZVLW256HEHP
HP Spectre x360 13-ae048ng
Toshiba NVMe THNSN51T02DUK
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
Samsung SSD PM961 1TB M.2 PCIe 3.0 x4 NVMe (MZVLW1T0)
CrystalDiskMark 3.0
82%
113%
165%
89%
215%
Write 4k QD32
247
331.1
34%
212.5
-14%
369.2
49%
437.3
77%
506.6
105%
Read 4k QD32
247.5
289.3
17%
295
19%
415.1
68%
541.6
119%
631.7
155%
Write 4k
92.69
134.4
45%
97.28
5%
146.2
58%
138.1
49%
182.2
97%
Read 4k
27.54
35.61
29%
49.38
79%
58.1
111%
45.99
67%
58.23
111%
Write 512
291.4
608.9
109%
797.1
174%
798.9
174%
575
97%
1292
343%
Read 512
291.9
935.3
220%
922.7
216%
1242
325%
619.9
112%
1040
256%
Write Seq
394.4
598.8
52%
1241
215%
1213
208%
776.3
97%
1693
329%
Read Seq
476.3
1187
149%
1487
212%
2046
330%
918.5
93%
2004
321%
Micron 1100 MTFDDAV256TBN
Transfer Rate Minimum: 37.3 MB/s
Transfer Rate Maximum: 138.7 MB/s
Transfer Rate Average: 105.3 MB/s
Access Time: 14.4 ms
Burst Rate: 170.3 MB/s
CPU Usage: 4.3 %

Graphics

Nvidia Geforce GTX 1050 (laptop)
Nvidia Geforce GTX 1050 (laptop)

The Intel UHD Graphics 620 is responsible for the primary video output of 2D- and Windows applications. This graphics unit can support the processor during the playback of high-resolution videos while having a lower battery consumption than the dedicated graphics card, resulting in significantly longer battery runtimes. As previously stated, the second graphics solution installed in the Asus ZenBook Flip 15 is an Nvidia GeForce GTX 1050 with 2 GB of GDDR5 VRAM. However, the Asus ZenBook Flip 15 cannot keep up with the Lenovo Yoga 720 and the Acer Spin 5. Overall, though, we do appreciate the good midrange GPU that can still deliver a solid 3D performance.

Additional benchmarks for the Intel UHD Graphics 620 and the Nvidia GeForce GTX 1050 can be found here.

3DMark
1920x1080 Fire Strike Graphics
Average NVIDIA GeForce GTX 1050 (Laptop)
  (4935 - 6393, n=41)
6008 Points ∼100% +13%
Lenovo Yoga 720-15IKB-80X7
NVIDIA GeForce GTX 1050 (Laptop), Intel Core i7-7700HQ
5885 Points ∼98% +10%
Acer Spin 5 SP515-51GN-80A3
NVIDIA GeForce GTX 1050 (Laptop), Intel Core i7-8550U
5688 Points ∼95% +7%
Asus ZenBook Flip 15 UX561UD
NVIDIA GeForce GTX 1050 (Laptop), Intel Core i7-8550U
5329 Points ∼89%
HP Envy x360 15-bq102ng
AMD Radeon RX Vega 8, AMD Ryzen 5 2500U
2310 Points ∼38% -57%
HP Spectre x360 13-ae048ng
Intel UHD Graphics 620, Intel Core i7-8550U
1047 Points ∼17% -80%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
Intel HD Graphics 620, Intel Core i7-7600U
1000 Points ∼17% -81%
Average of class Convertible
  (132 - 5965, n=219)
974 Points ∼16% -82%
1280x720 Sky Diver Graphics
Average NVIDIA GeForce GTX 1050 (Laptop)
  (13459 - 21425, n=15)
19310 Points ∼100% +43%
Acer Spin 5 SP515-51GN-80A3
NVIDIA GeForce GTX 1050 (Laptop), Intel Core i7-8550U
18397 Points ∼95% +37%
Asus ZenBook Flip 15 UX561UD
NVIDIA GeForce GTX 1050 (Laptop), Intel Core i7-8550U
13459 Points ∼70%
HP Envy x360 15-bq102ng
AMD Radeon RX Vega 8, AMD Ryzen 5 2500U
7899 Points ∼41% -41%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
Intel HD Graphics 620, Intel Core i7-7600U
3696 Points ∼19% -73%
Average of class Convertible
  (366 - 18939, n=67)
3652 Points ∼19% -73%
3DMark 11 - 1280x720 Performance GPU
Average NVIDIA GeForce GTX 1050 (Laptop)
  (6744 - 8223, n=39)
7633 Points ∼100% +4%
Asus ZenBook Flip 15 UX561UD
NVIDIA GeForce GTX 1050 (Laptop), Intel Core i7-8550U
7339 Points ∼96%
Acer Spin 5 SP515-51GN-80A3
NVIDIA GeForce GTX 1050 (Laptop), Intel Core i7-8550U
7043 Points ∼92% -4%
HP Envy x360 15-bq102ng
AMD Radeon RX Vega 8, AMD Ryzen 5 2500U
3549 Points ∼46% -52%
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
Intel HD Graphics 620, Intel Core i7-7600U
1633 Points ∼21% -78%
HP Spectre x360 13-ae048ng
Intel UHD Graphics 620, Intel Core i7-8550U
1497 Points ∼20% -80%
Average of class Convertible
  (173 - 7483, n=309)
1204 Points ∼16% -84%
3DMark Ice Storm
3DMark Ice Storm
3DMark Ice Storm Unlimited
3DMark Ice Storm Unlimited
3DMark Ice Storm Extreme
3DMark Ice Storm Extreme
3DMark Cloud Gate
3DMark Cloud Gate
3DMark Sky Diver
3DMark Sky Diver
3DMark Fire Strike
3DMark Fire Strike
3DMark Fire Strike Extreme
3DMark Fire Strike Extreme
3DMark Fire Strike Ultra
3DMark Fire Strike Ultra
3DMark 11
3DMark 11
 
3DMark 11 Performance
7350 points
3DMark Ice Storm Standard Score
18360 points
3DMark Cloud Gate Standard Score
13101 points
3DMark Fire Strike Score
4900 points
3DMark Fire Strike Extreme Score
2512 points
Help

Gaming Performance

The performance of the Nvidia GeForce GTX 1050 might not be top-tier, but even more demanding games can be played smoothly on the Asus ZenBook Flip 15. However, it is not possible to have a 4K gaming experience on this convertible, but Full HD suffices for many older games and even some of the more recent titles. The 2 GB VRAM quickly reaches its limits, though, meaning some games have to be played on medium settings. The Asus ZenBook Flip 15 is no substitute for a pure gaming laptop.

low med. high ultra4K
BioShock Infinite (2013) 205.6144.8128.955.5fps
Battlefield 4 (2013) 167.1121.496.243.419.5fps
Rise of the Tomb Raider (2016) 91.956.934.230.312.7fps

Emissions - Quiet Asus Device with Too Much Energy Consumption

Noise Emissions

Noise characteristics
Noise characteristics

It is not possible for the Asus ZenBook Flip 15 to run the system entirely without noise. At 31.1 dB(A), the convertible is slightly louder than the ambient noise (30.3 dB(A)) even in idle mode. The hard drive was not measurable separately, and thus, not audible on its own from inside the case. Both fans sped up noticeably under load and were audible at 36.4 dB(A), which can still be considered quiet. Under maximum load, we measured peak values of 37.1 dB(A) for our test sample. On average, all comparison devices in this test had a similar level of noise emissions, even though the Lenovo Yoga 720 and the Acer Spin 15 were significantly louder under load at 40 dB(A) than our Asus test sample. Considering the performance, the noise level of the ZenBook Flip 15 is really low.

Noise Level

Idle
31.3 / 31.3 / 31.3 dB(A)
Load
36.4 / 37.1 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: 30.4 dB(A)
dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2035.633.831.930.935.62535.432.830.532.135.43141.733.435.433.741.74033.930.829.429.333.95039.538.429.130.639.56333.233.627.727.233.28028.430.127.227.228.410029.527.927.725.129.512526.325.724.924.626.316024.524.523.72324.520023.323.223.722.723.32502323.422.722.42331522.622.421.521.622.640021.122.620.920.321.150020.522.32018.820.563020.622.419.918.520.680022.525.221.317.822.5100022.326.819.917.722.3125022.727.119.517.722.7160024.428.619.517.724.4200023.728.818.417.323.7250023.428.918.417.723.4315020.628.418.717.820.6400018.923.618.218.118.9500018.720.918.318.218.7630018.72018.518.518.7800018.718.918.518.518.71000018.718.818.518.618.71250018.619.218.618.518.61600018.718.918.818.718.7SPL33.83831.430.433.8N1.92.71.61.41.9median 22.3median 23.4median 19.5median 18.5median 22.3Delta1.73.11.52.21.7hearing rangehide median Fan NoiseAsus ZenBook Flip 15 UX561UD
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 (Laptop), 8550U, Micron 1100 MTFDDAV256TBN
Acer Spin 5 SP515-51GN-80A3
GeForce GTX 1050 (Laptop), 8550U, Intel SSD 600p SSDPEKKW256G7
HP Envy x360 15-bq102ng
Vega 8, 2500U, Samsung PM961 MZVLW256HEHP
Lenovo Yoga 720-15IKB-80X7
GeForce GTX 1050 (Laptop), 7700HQ, Samsung PM961 MZVLW256HEHP
HP Spectre x360 13-ae048ng
UHD Graphics 620, 8550U, Toshiba NVMe THNSN51T02DUK
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
HD Graphics 620, 7600U, Samsung SSD PM961 1TB M.2 PCIe 3.0 x4 NVMe (MZVLW1T0)
Noise
-5%
0%
1%
5%
2%
off / environment *
30.4
30.2
1%
30.13
1%
28.2
7%
30.13
1%
29.3
4%
Idle Minimum *
31.3
30.2
4%
30.13
4%
28.2
10%
30.13
4%
29.3
6%
Idle Average *
31.3
30.2
4%
30.13
4%
28.2
10%
30
4%
31.1
1%
Idle Maximum *
31.3
30.9
1%
30.13
4%
28.2
10%
30.13
4%
33.3
-6%
Load Average *
36.4
42.4
-16%
38.8
-7%
39
-7%
33.4
8%
33.3
9%
Load Maximum *
37.1
44.8
-21%
38.8
-5%
46.3
-25%
33
11%
38.9
-5%

* ... smaller is better

Temperature

3DMark 11 after the stress test
3DMark 11 after the stress test

The low case temperatures of the Asus ZenBook Flip 15 are impressive, as we measured a maximum of 41.9 °C on the top under load. The bottom is only slightly cooler at 40.6 °C. Of all comparison devices, the ZenBook Flip 15 had the best results in this area. The highest case temperatures were measured for the Acer Spin 5 at 50.9 °C. The processor and the GPU had to struggle with high temperatures throughout the stress test. Our test device had a maximum temperature of 91 °C for the processor and 84 °C for the GPU. During the FurMark stress test, we witnessed thermal throttling of the processor's clock speed. When the CPU and GPU were burdened simultaneously, the clock speed of the Intel Core i7-8550U throttled to 900 MHz to contain the heat development. We did not notice any such throttling for the graphics processor of our test device. Surprisingly, there was no drop in 3D performance after the stress test. The comparison with 3DMark 11 shows an almost identical result after a cold boot.

Stress test: Prime95 solo
Stress test: Prime95 solo
Stress test: FurMark solo
Stress test: FurMark solo
Stress test: FurMark+Prime95
Stress test: FurMark+Prime95
Max. Load
 39.5 °C
103 F
41.9 °C
107 F
38.9 °C
102 F
 
 39 °C
102 F
40.7 °C
105 F
34.6 °C
94 F
 
 31.9 °C
89 F
29.5 °C
85 F
30.7 °C
87 F
 
Maximum: 41.9 °C = 107 F
Average: 36.3 °C = 97 F
35.1 °C
95 F
37 °C
99 F
40.6 °C
105 F
33.5 °C
92 F
38.1 °C
101 F
40.1 °C
104 F
30.6 °C
87 F
32.4 °C
90 F
32.6 °C
91 F
Maximum: 40.6 °C = 105 F
Average: 35.6 °C = 96 F
Power Supply (max.)  47.7 °C = 118 F | Room Temperature 23.5 °C = 74 F | FIRT 550-Pocket
(±) The average temperature for the upper side under maximal load is 36.3 °C / 97 F, compared to the average of 30.4 °C / 87 F for the devices in the class Convertible.
(±) The maximum temperature on the upper side is 41.9 °C / 107 F, compared to the average of 35.4 °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 25.3 °C / 78 F, compared to the device average of 30.4 °C / 87 F.
(+) The palmrests and touchpad are cooler than skin temperature with a maximum of 31.9 °C / 89.4 F and are therefore cool to the touch.
(-) The average temperature of the palmrest area of similar devices was 29.1 °C / 84.4 F (-2.8 °C / -5 F).
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 (Laptop), 8550U, Micron 1100 MTFDDAV256TBN
Acer Spin 5 SP515-51GN-80A3
GeForce GTX 1050 (Laptop), 8550U, Intel SSD 600p SSDPEKKW256G7
HP Envy x360 15-bq102ng
Vega 8, 2500U, Samsung PM961 MZVLW256HEHP
Lenovo Yoga 720-15IKB-80X7
GeForce GTX 1050 (Laptop), 7700HQ, Samsung PM961 MZVLW256HEHP
HP Spectre x360 13-ae048ng
UHD Graphics 620, 8550U, Toshiba NVMe THNSN51T02DUK
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
HD Graphics 620, 7600U, Samsung SSD PM961 1TB M.2 PCIe 3.0 x4 NVMe (MZVLW1T0)
Heat
-8%
-10%
-9%
-12%
-2%
Maximum Upper Side *
41.9
50.9
-21%
38
9%
42.8
-2%
46.5
-11%
47.5
-13%
Maximum Bottom *
40.6
44.2
-9%
37.1
9%
49.6
-22%
46.5
-15%
44.8
-10%
Idle Upper Side *
26.6
26.3
1%
38.6
-45%
27.2
-2%
29.6
-11%
23.7
11%
Idle Bottom *
26
27.1
-4%
29.2
-12%
28.6
-10%
28.4
-9%
24.6
5%

* ... smaller is better

Heat development top (idle)
Heat development top (idle)
Heat development bottom (idle)
Heat development bottom (idle)
Heat development top (load)
Heat development top (load)
Heat development bottom (load)
Heat development bottom (load)

Speakers

Speaker characteristics
Speaker characteristics

The two speakers are located at the front, below the wrist rest. The speaker grills in the base unit face downwards so that the sound can get reflected by the table top and then passed on to the user. On soft surfaces in particular, this can muffle the sound, though. The membranes are of a high quality and exceeded our expectations. The treble and mids have a clear sound, even at maximum volume. The bass had a good audio reproduction as well. The "AudioWizard" software offers numerous options to the user, such as choosing between pre-defined profiles, but also manually adjusting all sound settings via the equalizer. For an even better sound experience, we recommend an external sound system, which can be connected via the 3.5 mm audio jack (headphone/mic).

Speaker grill on the right side
Speaker grill on the right side
Speaker grill on the left side
Speaker grill on the left side
Right speaker
Right speaker
dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2035.230.935.22536.132.136.13140.933.740.94039.929.339.95038.230.638.26330.627.230.6803627.23610045.225.145.212550.124.650.116050.42350.420043.522.743.525053.622.453.631559.421.659.440066.120.366.150066.718.866.763068.918.568.980074.517.874.5100073.117.773.1125071.917.771.9160071.117.771.1200075.817.375.8250069.117.769.131506817.868400064.818.164.8500062.218.262.2630058.818.558.8800054.218.554.2100005418.6541250052.218.552.21600050.118.750.1SPL82.130.482.1N49.21.449.2median 62.2median 18.5median 62.2Delta8.12.28.132.931.732.933.535.133.532.634.732.632.934.632.937.237.637.236283626.327.126.330.625.230.641.523.841.546.923.546.947.422.647.443.72243.751.720.751.764.920.264.965.819.265.867.61867.665.617.865.667.818.167.870.717.570.767.817.267.867.817.567.868.217.668.268.717.568.763.717.963.760.91860.96318.16360.518.360.55418.35451.418.251.449.618.349.678.630.278.642.71.442.7median 63median 18.2median 639.61.39.6hearing rangehide median Pink NoiseAsus ZenBook Flip 15 UX561UDAcer Spin 5 SP515-51GN-80A3
Asus ZenBook Flip 15 UX561UD audio analysis

(±) | speaker loudness is average but good (75.8 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 11.8% lower than median
(±) | linearity of bass is average (14.2% delta to prev. frequency)
Mids 400 - 2000 Hz
(±) | higher mids - on average 8.8% higher than median
(+) | mids are linear (6.6% delta to prev. frequency)
Highs 2 - 16 kHz
(±) | reduced highs - on average 5% lower than median
(±) | linearity of highs is average (7.1% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (19.7% difference to median)
Compared to same class
» 38% of all tested devices in this class were better, 11% similar, 51% worse
» The best had a delta of 11%, average was 22%, worst was 53%
Compared to all devices tested
» 40% of all tested devices were better, 7% similar, 53% worse
» The best had a delta of 3%, average was 21%, worst was 53%

Acer Spin 5 SP515-51GN-80A3 audio analysis

(-) | not very loud speakers (70.7 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 19.4% lower than median
(±) | linearity of bass is average (12.2% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 4.2% away from median
(±) | linearity of mids is average (7.2% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 3.6% away from median
(+) | highs are linear (6.3% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (19.4% difference to median)
Compared to same class
» 36% of all tested devices in this class were better, 10% similar, 54% worse
» The best had a delta of 11%, average was 22%, worst was 53%
Compared to all devices tested
» 38% of all tested devices were better, 7% similar, 56% worse
» The best had a delta of 3%, average was 21%, worst was 53%

Frequency diagram in comparison (checkboxes can be turned on/off!)

Energy Management

Power Consumption

120-watt power supply
120-watt power supply
120-watt power supply
120-watt power supply

As the comparison chart shows, the Asus ZenBook Flip 15 is no miracle of energy efficiency. Only the Lenovo Yoga 720 has a similarly high power consumption. All of the other comparison devices are considerably more energy-efficient while many of them do not have a dedicated graphics card. At 5.4 to 13.9 watts, the ZenBook's power consumption in idle mode is still acceptable, though. Under load, the consumption rises to an average of 94 watts. We measured a peak value of 116 watts, which is a value that the power supply can still handle, as it has a maximum of 120 watts.

Power Consumption
Off / Standbydarklight 0.33 / 0.38 Watt
Idledarkmidlight 5.4 / 10.8 / 13.9 Watt
Load midlight 94 / 116.6 Watt
 color bar
Key: min: dark, med: mid, max: light        Metrahit Energy
Asus ZenBook Flip 15 UX561UD
8550U, GeForce GTX 1050 (Laptop), Micron 1100 MTFDDAV256TBN, IPS, 3840x2160, 15.6
Acer Spin 5 SP515-51GN-80A3
8550U, GeForce GTX 1050 (Laptop), Intel SSD 600p SSDPEKKW256G7, a-Si TFT-LCD, LCM, IPS, 1920x1080, 15.6
HP Envy x360 15-bq102ng
2500U, Vega 8, Samsung PM961 MZVLW256HEHP, IPS, 1920x1080, 15.6
Lenovo Yoga 720-15IKB-80X7
7700HQ, GeForce GTX 1050 (Laptop), Samsung PM961 MZVLW256HEHP, IPS, 1920x1080, 15.6
HP Spectre x360 13-ae048ng
8550U, UHD Graphics 620, Toshiba NVMe THNSN51T02DUK, IPS, 1920x1080, 13.3
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
7600U, HD Graphics 620, Samsung SSD PM961 1TB M.2 PCIe 3.0 x4 NVMe (MZVLW1T0), OLED, 2560x1440, 14
Power Consumption
31%
39%
1%
51%
33%
Idle Minimum *
5.4
3.9
28%
4.8
11%
8.3
-54%
3.2
41%
4.9
9%
Idle Average *
10.8
6.7
38%
7
35%
10.2
6%
6
44%
7.6
30%
Idle Maximum *
13.9
8.7
37%
9.5
32%
10.4
25%
9.2
34%
13.8
1%
Load Average *
94
74
21%
40.8
57%
67.5
28%
29.5
69%
33.4
64%
Load Maximum *
116.6
79
32%
44.3
62%
117.2
-1%
35.6
69%
46.5
60%
Witcher 3 ultra *
96.5

* ... smaller is better

Battery Runtime

3DMark 11 in battery mode
3DMark 11 in battery mode
52 Wh battery
52 Wh battery

Due to the relatively high power consumption, the battery runtimes are unfortunately rather short as well. A battery charge lasted only slightly above 5 hours in our practical Wi-Fi test before the 52 Wh battery had to be recharged. We reduced the display's brightness level by five for this test, which corresponds to a display brightness of 150 cd/m². About 2 hours should be calculated for the charging process. The 3D performance throttled noticeably in battery mode, as was confirmed by a rerun of 3DMark 11.

Battery Runtime
Idle (without WLAN, min brightness)
9h 18min
NBC WiFi Websurfing Battery Test 1.3
5h 11min
Big Buck Bunny H.264 1080p
4h 21min
Load (maximum brightness)
1h 24min
Maximum battery runtime
Maximum battery runtime
Minimum battery runtime
Minimum battery runtime
Wi-Fi battery runtime
Wi-Fi battery runtime
H.264 battery runtime
H.264 battery runtime
Charging time
Charging time
Asus ZenBook Flip 15 UX561UD
8550U, GeForce GTX 1050 (Laptop), 52 Wh
Acer Spin 5 SP515-51GN-80A3
8550U, GeForce GTX 1050 (Laptop), 48 Wh
HP Envy x360 15-bq102ng
2500U, Vega 8, 55.8 Wh
Lenovo Yoga 720-15IKB-80X7
7700HQ, GeForce GTX 1050 (Laptop), 72 Wh
HP Spectre x360 13-ae048ng
8550U, UHD Graphics 620, 60 Wh
Lenovo ThinkPad X1 Yoga 2017 20JES03T00
7600U, HD Graphics 620, 56 Wh
Battery Runtime
22%
37%
54%
159%
40%
Reader / Idle
558
759
36%
1066
91%
784
41%
H.264
261
331
27%
1070
310%
408
56%
WiFi v1.3
311
373
20%
426
37%
484
56%
527
69%
368
18%
Load
84
88
5%
96
14%
166
98%
120
43%

Verdict

Pros

+ stylish design
+ robust aluminum case
+ fast Intel Core i7-8550U
+ 16 GB of RAM
+ viable input devices
+ backlit keyboard
+ USB 3.1 Type-C Gen 2 port
+ Nvidia GeForce GTX 1050 with 2 GB of VRAM
+ 256 GB SSD + 2 TB HDD
+ infrared camera (capable of Windows Hello)
+ very good 4K touchscreen with high color space coverage
+ no PWM
+ generous scope of delivery (stylus, bag, RJ45 adapter)
+ good speakers

Cons

- relatively high power consumption
- subpar battery runtimes
- slow memory card reader
- thermal throttling (CPU)
- very glossy display
- relatively heavy
The Asus ZenBook Flip 15, courtesy of notebooksbilliger.de
The Asus ZenBook Flip 15, courtesy of notebooksbilliger.de

The Asus ZenBook Flip 15 is a stylish 15-inch convertible. The robust aluminum base contains an Intel Core i7-8550U together with 16 GB of DDR4 RAM and ample storage space. A total of 2.2 TB divided between a 256 GB SSD and a 2 TB HDD offers many possibilities for the user, especially since the convertible is also suitable for gaming thanks to its Nvidia GeForce GTX 1050. Asus equipped the ZenBook Flip 15 with an excellent 4K IPS display, which was really convincing in our test due to its good brightness and very good color space coverage. The included stylus and the stylish laptop bag are additional assets. The convertible in this configuration has a purchase price of 1799 Euros, which is appropriate considering the performance and the installed hardware.

The Asus ZenBook Flip 15 was very convincing in our test, thanks to its good hardware and flawless build quality. Working on the 4K touchscreen is fun and the stylish convertible can run even demanding games.

However, the energy efficiency of the Asus ZenBook Flip 15 was not convincing at all, leading to subpar battery runtimes. Users looking to buy a fast convertible also suitable for the occasional gaming session will be happy with the Asus ZenBook Flip 15. Graphic artists will be satisfied with the device as well, thanks to its really good 4K display.

Asus ZenBook Flip 15 UX561UD - 03/30/2018 v6
Sebastian Bade

Chassis
93 / 98 → 94%
Keyboard
86%
Pointing Device
84%
Connectivity
63 / 80 → 78%
Weight
63 / 35-78 → 64%
Battery
79%
Display
87%
Games Performance
87 / 68 → 100%
Application Performance
81 / 87 → 93%
Temperature
92%
Noise
91%
Audio
64 / 91 → 70%
Camera
40 / 85 → 46%
Average
78%
82%
Convertible - Weighted Average

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> Notebook / Laptop Reviews and News > Reviews > Asus ZenBook Flip 15 (i7-8550U, GTX 1050, 4K, SSD, HDD) Convertible Review
Sebastian Bade, 2018-04- 5 (Update: 2018-04- 9)