Notebookcheck

Chuwi LarkBook Laptop Review: Good Looks, Poor Performance

Not enough power. If all you want to do is email and some light browsing, then the Chuwi LarkBook might be worth a look. For anything more, a basic Core i3 system will do you better.

The Chuwi LarkBook is the company's latest subnotebook that follows the same formula as previous generation models from the manufacturer: create a high-end looking laptop with bottom-of-the-barrel prices and processors. The test unit we have here is one of the very few laptops to come equipped with the dual-core Celeron N4120, but key specifications are otherwise similar to many costlier Ultrabooks including the 1080p IPS display and integrated USB-C port. Chuwi is currently selling the laptop for $489 USD or $399 if on sale.

Competitors in this space include other budget 13.3-inch laptops like the Asus VivoBook S13, Lenovo IdeaPad 3 series, and HP Pavilion 13 series.

More Chuwi reviews:

Chuwi LarkBook CWI509
Processor
Intel Celeron N4120 4 x 1.1 - 2.6 GHz, Gemini Lake
Graphics adapter
Intel UHD Graphics 600, 27.20.100.8682
Memory
8192 MB 
, 1200 MHz, dual-channel, soldered
Display
13.30 inch 16:9, 1920 x 1080 pixel 166 PPI, M133X56, IPS, glossy: yes, 60 Hz
Storage
Kingston RBUSNS8180DS3256GJ, 256 GB 
Soundcard
Intel Gemini Lake SoC - High Definition Audio Controller
Connections
1 USB 2.0, 2 USB 3.0 / 3.1 Gen1, 1 HDMI, 1 DisplayPort, Audio Connections: 3.5 mm combo, Card Reader: MicroSD reader
Networking
Qualcomm Atheros QCA9377 Wireless Network Adapter (a/b/g/n = Wi-Fi 4/ac = Wi-Fi 5), Bluetooth 5
Size
height x width x depth (in mm): 12.3 x 307 x 200.8 ( = 0.48 x 12.09 x 7.91 in)
Battery
34.8 Wh Lithium-Polymer
Operating System
Microsoft Windows 10 Home 64 Bit
Camera
Webcam: 720p
Primary Camera: 0.9 MPix
Additional features
Speakers: Quad speakers, Keyboard: Chiclet, Keyboard Light: no, 12 Months Warranty
Weight
1.093 kg ( = 38.55 oz / 2.41 pounds), Power Supply: 119 g ( = 4.2 oz / 0.26 pounds)
Price
490 USD
Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

 

potential competitors in comparison

Rating
Date
Model
Weight
Height
Size
Resolution
Best Price
77 %
12/2020
Chuwi LarkBook CWI509
Celeron N4120, UHD Graphics 600
1.1 kg12.3 mm13.30"1920x1080
91 %
12/2020
Apple MacBook Air 2020 M1 Entry
M1, M1 7-Core GPU
1.3 kg16.1 mm13.30"2560x1600
88 %
10/2020
Dell XPS 13 9310 Core i7 FHD
i7-1165G7, Iris Xe G7 96EUs
1.3 kg14.8 mm13.40"1920x1200
85 %
12/2019
Lenovo IdeaPad S540-13API
R5 3550H, Vega 8
1.3 kg16 mm13.30"2560x1600
82 %
12/2020
HP Pavilion 13-bb0015cl
i7-1165G7, Iris Xe G7 96EUs
1.2 kg17.7 mm13.30"3840x2160
85 %
12/2018
Asus VivoBook S13 S330UA-EY034T
i5-8550U, UHD Graphics 620
1.2 kg17.9 mm13.30"1920x1080

Case

Like most other laptops from Chuwi, the metal chassis is a highlight of the LarkBook. Its design is probably sleeker, sharper, and lighter than any other laptop for the price since plastic is much more common in this sub $500 category. Build quality feels good as well with only minor warping of the base and lid and almost no creaking.

A notable drawback to the chassis are the hinges which feel weaker at certain angles. We wouldn't be surprised if the lid begins to teeter more readily after a year or so.

Metal chassis with chrome-cut edges and corners
Metal chassis with chrome-cut edges and corners
Lid opens all the way to 180 degrees
Lid opens all the way to 180 degrees
Hinges become noticeably weaker past the ~140 degree mark
Hinges become noticeably weaker past the ~140 degree mark
Dark gray surface is slightly roughened to reduce unsightly fingerprint buildup
Dark gray surface is slightly roughened to reduce unsightly fingerprint buildup
Chassis design is sharp for a cheap laptop
Chassis design is sharp for a cheap laptop
Top bezel protrudes much like on some newer Lenovo Yoga laptops
Top bezel protrudes much like on some newer Lenovo Yoga laptops
309 mm / 12.2 inch 205 mm / 8.07 inch 17.7 mm / 0.697 inch 1.2 kg2.71 lbs305 mm / 12 inch 196 mm / 7.72 inch 17.9 mm / 0.705 inch 1.2 kg2.7 lbs304.1 mm / 12 inch 212.4 mm / 8.36 inch 16.1 mm / 0.634 inch 1.3 kg2.8 lbs307 mm / 12.1 inch 200.8 mm / 7.91 inch 12.3 mm / 0.4843 inch 1.1 kg2.41 lbs296.9 mm / 11.7 inch 208.6 mm / 8.21 inch 16 mm / 0.63 inch 1.3 kg2.82 lbs296 mm / 11.7 inch 199 mm / 7.83 inch 14.8 mm / 0.583 inch 1.3 kg2.85 lbs

Connectivity

Keep in mind that the laptop integrates mini-HDMI instead of full-size HDMI meaning most users will need an adapter for connecting external monitors.

Front: No connectivity
Front: No connectivity
Right: MicroSD reader, USB-A 2.0, 3.5 mm combo audio
Right: MicroSD reader, USB-A 2.0, 3.5 mm combo audio
Rear: No connectivity
Rear: No connectivity
Left: AC adapter, USB-A 3.0, mini-HDMI, USB-C w/ DisplayPort
Left: AC adapter, USB-A 3.0, mini-HDMI, USB-C w/ DisplayPort

SD Card Reader

Transfer rates from the SD card reader is slow. Furthermore, an inserted card sits deeper than the edge of the laptop and so the card can be difficult to eject.

Annoyingly, when the laptop is right-side up, the MicroSD reader must be inserted upside-down
Annoyingly, when the laptop is right-side up, the MicroSD reader must be inserted upside-down
SDCardreader Transfer Speed
average JPG Copy Test (av. of 3 runs)
Dell XPS 13 9310 Core i7 FHD
  (Toshiba Exceria Pro M501 64 GB UHS-II)
194.7 MB/s ∼100% +743%
HP Pavilion 13-bb0015cl
  (Toshiba Exceria Pro M501 32 GB UHS-II)
78.58 MB/s ∼40% +240%
Asus VivoBook S13 S330UA-EY034T
  (Toshiba Exceria Pro M501 64 GB UHS-II)
32.2 MB/s ∼17% +39%
Chuwi LarkBook CWI509
  (Toshiba Exceria Pro M501 32 GB UHS-II)
23.1 MB/s ∼12%
maximum AS SSD Seq Read Test (1GB)
Dell XPS 13 9310 Core i7 FHD
  (Toshiba Exceria Pro M501 64 GB UHS-II)
204.2 MB/s ∼100% +667%
HP Pavilion 13-bb0015cl
  (Toshiba Exceria Pro M501 32 GB UHS-II)
85.62 MB/s ∼42% +222%
Asus VivoBook S13 S330UA-EY034T
  (Toshiba Exceria Pro M501 64 GB UHS-II)
39.7 MB/s ∼19% +49%
Chuwi LarkBook CWI509
  (Toshiba Exceria Pro M501 32 GB UHS-II)
26.63 MB/s ∼13%

Communication

Wireless transfer rates are very slow when connected to our Netgear RAX200 router with the soldered Atheros QCA9377
Wireless transfer rates are very slow when connected to our Netgear RAX200 router with the soldered Atheros QCA9377
Networking
iperf3 Client (receive) TCP 1 m 4M x10
Dell XPS 13 9310 Core i7 FHD
Intel Killer Wi-Fi 6 AX1650s
1439 (1386min - 1504max) MBit/s ∼100% +478%
HP Pavilion 13-bb0015cl
Intel Wi-Fi 6 AX201
1422 (1307min - 1500max) MBit/s ∼99% +471%
Apple MacBook Air 2020 M1 Entry
Apple AirPort Extreme M1
672 (614min - 682max) MBit/s ∼47% +170%
Lenovo IdeaPad S540-13API
Atheros/Qualcomm QCA6174
501 (257min - 533max) MBit/s ∼35% +101%
Asus VivoBook S13 S330UA-EY034T
Intel Dual Band Wireless-AC 8265
410 (231min - 484max) MBit/s ∼28% +65%
Chuwi LarkBook CWI509
Qualcomm Atheros QCA9377 Wireless Network Adapter
249 (210min - 322max) MBit/s ∼17%
iperf3 Client (transmit) TCP 1 m 4M x10
HP Pavilion 13-bb0015cl
Intel Wi-Fi 6 AX201
1327 (1209min - 1398max) MBit/s ∼100% +341%
Dell XPS 13 9310 Core i7 FHD
Intel Killer Wi-Fi 6 AX1650s
975 (786min - 1026max) MBit/s ∼73% +224%
Asus VivoBook S13 S330UA-EY034T
Intel Dual Band Wireless-AC 8265
623 (313min - 643max) MBit/s ∼47% +107%
Apple MacBook Air 2020 M1 Entry
Apple AirPort Extreme M1
552 (257min - 620max) MBit/s ∼42% +83%
Lenovo IdeaPad S540-13API
Atheros/Qualcomm QCA6174
447 (247min - 510max) MBit/s ∼34% +49%
Chuwi LarkBook CWI509
Qualcomm Atheros QCA9377 Wireless Network Adapter
301 (258min - 338max) MBit/s ∼23%
050100150200250300350Tooltip
; iperf3 Client (receive) TCP 1 m 4M x10; iperf 3.1.3: Ø248 (210-322)
; iperf3 Client (transmit) TCP 1 m 4M x10; iperf 3.1.3: Ø301 (258-338)

Webcam

ColorChecker
12.1 ∆E
12.5 ∆E
18.2 ∆E
20.5 ∆E
18.6 ∆E
9.4 ∆E
9.7 ∆E
16.3 ∆E
18.2 ∆E
15.8 ∆E
9.8 ∆E
9.7 ∆E
9 ∆E
7.8 ∆E
22.1 ∆E
5.5 ∆E
16.6 ∆E
9.4 ∆E
11.1 ∆E
8.2 ∆E
9.2 ∆E
10.6 ∆E
7.8 ∆E
3.2 ∆E
ColorChecker Chuwi LarkBook CWI509: 12.14 ∆E min: 3.16 - max: 22.12 ∆E

Maintenance

The bottom panel is tricky to open as there are screws hidden underneath the rear rubber feet
The bottom panel is tricky to open as there are screws hidden underneath the rear rubber feet

Accessories and Warranty

There are no extras in the box other than the AC adapter. The usual one-year limited warranty applies, but oversea buyers may need to pay for shipping and handling and deal with longer wait times.

Input Devices

Keyboard

Key feedback is not uniform. The main QWERTY keys, for example, are slightly on the soft side and with quieter clatter than the firmer and louder Backspace key. Even the Enter key feels different with its spongier and lighter feedback than the QWERTY and Backspace keys. Typing on the LarkBook may take some getting used to.

Touchpad

The Precision-enabled clickpad is decent in size (11.5 x 6.5 cm) and with a smooth glide when moving at fast speeds. Unfortunately, there is noticeable sticking when moving at slower or medium speeds and so the cursor tends to jump frequently.

The integrated mouse buttons are both clicky and very shallow. Feedback is weak and could have been stronger.

Standard keyboard layout with no backlight
Standard keyboard layout with no backlight
The main QWERTY keys have decent feedback and travel, but the Enter key is strangely softer and with weaker feedback
The main QWERTY keys have decent feedback and travel, but the Enter key is strangely softer and with weaker feedback
Clicking on the clickpad could've been firmer for more satisfying feedback
Clicking on the clickpad could've been firmer for more satisfying feedback
Up and Down arrow keys are very spongy. Furthermore, grease will accumulate quickly on the keycaps
Up and Down arrow keys are very spongy. Furthermore, grease will accumulate quickly on the keycaps

Display

The LarkBook utilizes an IPS panel with the model name M133X56 that can be found on no other laptop in our database as of this writing. Though texts and images are crisp due to the glossy overlay, colors are way off as our X-Rite measurements below will show. Maximum brightness is also dimmer than on most other Ultrabooks. Nonetheless, the high contrast ratio makes it a decent display for 1080p video playback.

Users sensitive to onscreen flickering may want to avoid using this laptop for long periods due to the presence of pulse-width modulation on almost all brightness levels.

Edge-to-edge glass. However, the display is not a touchscreen
Edge-to-edge glass. However, the display is not a touchscreen
Narrow side bezels. The bottom "chin" bezel is much thicker
Narrow side bezels. The bottom "chin" bezel is much thicker
Crisp RGB subpixel array
Crisp RGB subpixel array
Minimal uneven backlight bleeding
Minimal uneven backlight bleeding
244.7
cd/m²
240.7
cd/m²
235.9
cd/m²
225.2
cd/m²
235.3
cd/m²
212.8
cd/m²
200
cd/m²
221.9
cd/m²
194.5
cd/m²
Distribution of brightness
M133X56
X-Rite i1Pro 2
Maximum: 244.7 cd/m² Average: 223.4 cd/m² Minimum: 6.77 cd/m²
Brightness Distribution: 79 %
Center on Battery: 235.3 cd/m²
Contrast: 980:1 (Black: 0.24 cd/m²)
ΔE Color 8.37 | 0.6-29.43 Ø5.7, calibrated: 2.64
ΔE Greyscale 9.8 | 0.64-98 Ø5.9
92.4% sRGB (Argyll 3D) 60.1% AdobeRGB 1998 (Argyll 3D)
Gamma: 2.16
Chuwi LarkBook CWI509
M133X56, IPS, 13.30, 1920x1080
Apple MacBook Air 2020 M1 Entry
IPS, 13.30, 2560x1600
Dell XPS 13 9310 Core i7 FHD
Sharp LQ134N1, IPS, 13.40, 1920x1200
Lenovo IdeaPad S540-13API
CSOT T3 MND307DA1-2, IPS, 13.30, 2560x1600
HP Pavilion 13-bb0015cl
AUOCA8D, IPS, 13.30, 3840x2160
Asus VivoBook S13 S330UA-EY034T
N133HCE-EAA, IPS LED, 13.30, 1920x1080
Response Times
3909%
29%
-17%
-43%
830%
Response Time Grey 50% / Grey 80% *
32 (14.8, 17.2)
31 (14, 17)
3%
52 (27.6, 24.4)
-63%
45.6 (21.6, 24)
-43%
52.4 (25.2, 27.2)
-64%
40.8 (22, 18.8)
-28%
Response Time Black / White *
34.4 (19.6, 14.8)
26.1 (14.9, 11.2)
24%
33.2 (19.2, 14)
3%
30.8 (16.8, 14)
10%
41.6 (21.2, 20.4)
-21%
29.6 (16.4, 13.2)
14%
PWM Frequency
1000 (99)
118000 (49, 155)
11700%
2475 (20)
148%
26040 (20)
2504%
Screen
49%
46%
39%
38%
0%
Brightness middle
235.3
417
77%
543.3
131%
321
36%
514.1
118%
280
19%
Brightness
223
395
77%
524
135%
314
41%
501
125%
265
19%
Brightness Distribution
79
91
15%
92
16%
94
19%
91
15%
89
13%
Black Level *
0.24
0.39
-63%
0.38
-58%
0.19
21%
0.37
-54%
0.24
-0%
Contrast
980
1069
9%
1430
46%
1689
72%
1389
42%
1167
19%
Colorchecker DeltaE2000 *
8.37
1.12
87%
3.02
64%
3.3
61%
4.35
48%
5.6
33%
Colorchecker DeltaE2000 max. *
15.79
2.71
83%
7.61
52%
6
62%
6.5
59%
20.7
-31%
Colorchecker DeltaE2000 calibrated *
2.64
0.77
71%
1.23
53%
1.7
36%
2.26
14%
4.3
-63%
Greyscale DeltaE2000 *
9.8
1.7
83%
5
49%
3.5
64%
5.2
47%
4.1
58%
Gamma
2.16 102%
2207 0%
2.02 109%
2.08 106%
2.12 104%
2.44 90%
CCT
7557 86%
6870 95%
6550 99%
7245 90%
6308 103%
6614 98%
Color Space (Percent of AdobeRGB 1998)
60.1
66.8
11%
64.5
7%
60.6
1%
40.1
-33%
Color Space (Percent of sRGB)
92.4
99.6
8%
98.4
6%
93.3
1%
63
-32%
Total Average (Program / Settings)
1979% / 1014%
38% / 43%
11% / 30%
-3% / 25%
415% / 178%

* ... smaller is better

Color space is great at over 90 percent of sRGB to show that the laptop is capable of reproducing similar colors to many mid-range to high-end Ultrabooks. Cheaper panels tend to cover just 60 percent of sRGB only such as the one on the VivoBook S13.

vs. sRGB
vs. sRGB
vs. AdobeRGB
vs. AdobeRGB

Grayscale and colors are horrendous out of the box. Color temperature in particular is far too cool which is common to see on budget laptops. Calibrating the panel ourselves addresses the problem for a significantly better and more color accurate viewing experience. We highly recommend calibrating the display or applying our calibrated ICC profile above to get the most out of the screen.

Grayscale before calibration
Grayscale before calibration
Saturation Sweeps before calibration
Saturation Sweeps before calibration
ColorChecker before calibration
ColorChecker before calibration
Grayscale after calibration
Grayscale after calibration
Saturation Sweeps after calibration
Saturation Sweeps after calibration
ColorChecker after calibration
ColorChecker after calibration

Display Response Times

Display response times show how fast the screen is able to change from one color to the next. Slow response times can lead to afterimages and can cause moving objects to appear blurry (ghosting). Gamers of fast-paced 3D titles should pay special attention to fast response times.
       Response Time Black to White
34.4 ms ... rise ↗ and fall ↘ combined↗ 19.6 ms rise
↘ 14.8 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.8 (minimum) to 240 (maximum) ms. » 89 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (24.3 ms).
       Response Time 50% Grey to 80% Grey
32 ms ... rise ↗ and fall ↘ combined↗ 14.8 ms rise
↘ 17.2 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.8 (minimum) to 636 (maximum) ms. » 24 % of all devices are better.
This means that the measured response time is better than the average of all tested devices (38.6 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 detected 1000 Hz ≤ 99 % brightness setting

The display backlight flickers at 1000 Hz (Likely utilizing PWM) Flickering detected at a brightness setting of 99 % and below. There should be no flickering or PWM above this brightness setting.

The frequency of 1000 Hz is quite high, so most users sensitive to PWM should not notice any flickering.

In comparison: 51 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 9687 (minimum: 5 - maximum: 142900) Hz was measured.

Outdoor visibility is poor due to the glossy overlay and low maximum brightness. Expect a lot of glare and squinting even if working under shade.

Outdoors under sunlight
Outdoors under sunlight
Outdoors under shade
Outdoors under shade
Outdoors under sunlight
Outdoors under sunlight
Wide IPS viewing angles. Colors and contrast degrade if viewing from extreme angles
Wide IPS viewing angles. Colors and contrast degrade if viewing from extreme angles

Performance

Processor

Raw multi-thread CPU performance is comparable to the Celeron J4125 or Core m3-8100Y the latter of which can be found on the Microsoft Surface Go or HP ProBook x360 11.6 convertibles. This particular processor is very slow especially in single-thread performance where even the 5-year old Apple MacBook Air can outperform it in by almost 25 percent. The end-user experience is nowhere near as snappy as laptops powered by the Core i series.

More benchmark comparisons on the Celeron N4120 can be found on our dedicated page here.

0102030405060708090100110120130140150160170180190200210220230240250Tooltip
Chuwi LarkBook CWI509 Intel Celeron N4120; CPU Multi 64Bit: Ø219 (216.74-224.4)
Chuwi LapBook Plus Intel Atom x7-E3950; CPU Multi 64Bit: Ø124 (124.01-124.67)
Chuwi HeroBook 14 Intel Atom x5-E8000; CPU Multi 64Bit: Ø93.3 (92.16-97.02)
HP x2 210 G2 Intel Atom x5-Z8350; CPU Multi 64Bit: Ø96.1 (93.86-96.75)
Jumper Tech Ez Book X3 Air Intel Celeron N4100; CPU Multi 64Bit: Ø209 (208-211.45)
GMK NucBox K1 Intel Celeron J4125; CPU Multi 64Bit: Ø238 (199.13-242.53)
Cinebench R15: CPU Multi 64Bit | CPU Single 64Bit
Cinebench R20: CPU (Multi Core) | CPU (Single Core)
7-Zip 18.03: 7z b 4 -mmt1 | 7z b 4
Geekbench 5.3: 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 R15 / CPU Multi 64Bit
Apple MacBook Air 2020 M1 Entry
Apple M1
1020 (817min - 1020max) Points ∼100% +355%
Asus VivoBook S13 S330UA-EY034T
Intel Core i7-8550U
703 Points ∼69% +214%
HP Pavilion 13-bb0015cl
Intel Core i7-1165G7
684.52 (673.49min - 684.52max) Points ∼67% +206%
Lenovo ThinkPad X395
AMD Ryzen 3 PRO 3300U
481 Points ∼47% +115%
Dell XPS 13 7390 2-in-1 Core i3
Intel Core i3-1005G1
406 Points ∼40% +81%
Apple MacBook Air 2020 i3
Intel Core i3-1000NG4
333 (293min - 333max) Points ∼33% +49%
Microsoft Surface Go 2, m3-8100Y
Intel Core m3-8100Y
247 (213.96min - 218.42max) Points ∼24% +10%
GMK NucBox K1
Intel Celeron J4125
243 (199.13min - 242.53max) Points ∼24% +8%
Chuwi LarkBook CWI509
Intel Celeron N4120
224 (216.74min - 224.4max) Points ∼22%
Average Intel Celeron N4120
  (223 - 224, n=2)
224 Points ∼22% 0%
Apple MacBook 12 (Early 2016) 1.1 GHz
Intel Core m3-6Y30
218 Points ∼21% -3%
Jumper Tech Ez Book X3 Air
Intel Celeron N4100
211 (208min - 211.45max) Points ∼21% -6%
Chuwi LapBook Plus
Intel Atom x7-E3950
125 Points ∼12% -44%
HP x2 210 G2
Intel Atom x5-Z8350
97 Points ∼10% -57%
Chuwi HeroBook 14
Intel Atom x5-E8000
94 Points ∼9% -58%
Trekstor Primebook C13
Intel Celeron N3350
88 Points ∼9% -61%
Cinebench R15 / CPU Single 64Bit
HP Pavilion 13-bb0015cl
Intel Core i7-1165G7
220.86 Points ∼100% +202%
Apple MacBook Air 2020 M1 Entry
Apple M1
208 Points ∼94% +184%
Asus VivoBook S13 S330UA-EY034T
Intel Core i7-8550U
171 Points ∼77% +134%
Dell XPS 13 7390 2-in-1 Core i3
Intel Core i3-1005G1
157 Points ∼71% +114%
Apple MacBook Air 2020 i3
Intel Core i3-1000NG4
141 Points ∼64% +93%
Lenovo ThinkPad X395
AMD Ryzen 3 PRO 3300U
126 Points ∼57% +72%
Microsoft Surface Go 2, m3-8100Y
Intel Core m3-8100Y
121 Points ∼55% +65%
Apple MacBook 12 (Early 2016) 1.1 GHz
Intel Core m3-6Y30
91 Points ∼41% +24%
Apple MacBook 12 (Early 2016) 1.1 GHz
Intel Core m3-6Y30
90 Points ∼41% +23%
GMK NucBox K1
Intel Celeron J4125
75.3 Points ∼34% +3%
Chuwi LarkBook CWI509
Intel Celeron N4120
73.2 Points ∼33%
Average Intel Celeron N4120
  (73 - 73.2, n=2)
73.1 Points ∼33% 0%
Jumper Tech Ez Book X3 Air
Intel Celeron N4100
68.4 Points ∼31% -7%
Trekstor Primebook C13
Intel Celeron N3350
45 Points ∼20% -39%
Chuwi LapBook Plus
Intel Atom x7-E3950
41 Points ∼19% -44%
HP x2 210 G2
Intel Atom x5-Z8350
28 Points ∼13% -62%
Chuwi HeroBook 14
Intel Atom x5-E8000
27 Points ∼12% -63%
Cinebench R20 / CPU (Multi Core)
Apple MacBook Air 2020 M1 Entry
Apple M1
1863 Points ∼100% +280%
HP Pavilion 13-bb0015cl
Intel Core i7-1165G7
1863 Points ∼100% +280%
Dell XPS 13 7390 2-in-1 Core i3
Intel Core i3-1005G1
948 Points ∼51% +93%
Apple MacBook Air 2020 i3
Intel Core i3-1000NG4
587 Points ∼32% +20%
Microsoft Surface Go 2, m3-8100Y
Intel Core m3-8100Y
527 Points ∼28% +8%
Average Intel Celeron N4120
  (490 - 516, n=2)
503 Points ∼27% +3%
Chuwi LarkBook CWI509
Intel Celeron N4120
490 Points ∼26%
Jumper Tech Ez Book X3 Air
Intel Celeron N4100
451 Points ∼24% -8%
GMK NucBox K1
Intel Celeron J4125
304 Points ∼16% -38%
Chuwi LapBook Plus
Intel Atom x7-E3950
272 Points ∼15% -44%
Cinebench R20 / CPU (Single Core)
HP Pavilion 13-bb0015cl
Intel Core i7-1165G7
558 Points ∼100% +236%
Dell XPS 13 7390 2-in-1 Core i3
Intel Core i3-1005G1
403 Points ∼72% +143%
Apple MacBook Air 2020 M1 Entry
Apple M1
401 Points ∼72% +142%
Apple MacBook Air 2020 i3
Intel Core i3-1000NG4
348 Points ∼62% +110%
Microsoft Surface Go 2, m3-8100Y
Intel Core m3-8100Y
298 Points ∼53% +80%
Chuwi LarkBook CWI509
Intel Celeron N4120
166 Points ∼30%
Average Intel Celeron N4120
  (165 - 166, n=2)
166 Points ∼30% 0%
GMK NucBox K1
Intel Celeron J4125
161 Points ∼29% -3%
Jumper Tech Ez Book X3 Air
Intel Celeron N4100
152 Points ∼27% -8%
Chuwi LapBook Plus
Intel Atom x7-E3950
93 Points ∼17% -44%
7-Zip 18.03 / 7z b 4 -mmt1
HP Pavilion 13-bb0015cl
Intel Core i7-1165G7
5507 MIPS ∼100% +142%
Apple MacBook Air 2020 M1 Entry
Apple M1
5441 MIPS ∼99% +139%
Dell XPS 13 7390 2-in-1 Core i3
Intel Core i3-1005G1
3851 MIPS ∼70% +69%
Apple MacBook Air 2020 i3
Intel Core i3-1000NG4
3438 MIPS ∼62% +51%
Microsoft Surface Go 2, m3-8100Y
Intel Core m3-8100Y
3282 MIPS ∼60% +44%
GMK NucBox K1
Intel Celeron J4125
2361 MIPS ∼43% +4%
Chuwi LarkBook CWI509
Intel Celeron N4120
2279 MIPS ∼41%
Average Intel Celeron N4120
  (2145 - 2279, n=2)
2212 MIPS ∼40% -3%
Jumper Tech Ez Book X3 Air
Intel Celeron N4100
2155 MIPS ∼39% -5%
Chuwi LapBook Plus
Intel Atom x7-E3950
1454 MIPS ∼26% -36%
Chuwi HeroBook 14
Intel Atom x5-E8000
1286 MIPS ∼23% -44%
7-Zip 18.03 / 7z b 4
Apple MacBook Air 2020 M1 Entry
Apple M1
34614 MIPS ∼100% +382%
HP Pavilion 13-bb0015cl
Intel Core i7-1165G7
22445 MIPS ∼65% +212%
Dell XPS 13 7390 2-in-1 Core i3
Intel Core i3-1005G1
10942 MIPS ∼32% +52%
Apple MacBook Air 2020 i3
Intel Core i3-1000NG4
7921 MIPS ∼23% +10%
Microsoft Surface Go 2, m3-8100Y
Intel Core m3-8100Y
7554 MIPS ∼22% +5%
GMK NucBox K1
Intel Celeron J4125
7494 MIPS ∼22% +4%
Chuwi LarkBook CWI509
Intel Celeron N4120
7184 MIPS ∼21%
Jumper Tech Ez Book X3 Air
Intel Celeron N4100
6873 MIPS ∼20% -4%
Average Intel Celeron N4120
  (5832 - 7184, n=2)
6508 MIPS ∼19% -9%
Chuwi LapBook Plus
Intel Atom x7-E3950
4569 MIPS ∼13% -36%
Chuwi HeroBook 14
Intel Atom x5-E8000
4432 MIPS ∼13% -38%
Geekbench 5.3 / 64 Bit Single-Core Score
Apple MacBook Air 2020 M1 Entry
Apple M1
1727 Points ∼100% +293%
HP Pavilion 13-bb0015cl
Intel Core i7-1165G7
1595 Points ∼92% +263%
Apple MacBook Air 2020 i3
Intel Core i3-1000NG4
1096 Points ∼63% +150%
Microsoft Surface Go 2, m3-8100Y
Intel Core m3-8100Y
882 Points ∼51% +101%
Chuwi LarkBook CWI509
Intel Celeron N4120
439 Points ∼25%
Average Intel Celeron N4120
  (438 - 439, n=2)
439 Points ∼25% 0%
GMK NucBox K1
Intel Celeron J4125
435 Points ∼25% -1%
Jumper Tech Ez Book X3 Air
Intel Celeron N4100
404 Points ∼23% -8%
Geekbench 5.3 / 64 Bit Multi-Core Score
Apple MacBook Air 2020 M1 Entry
Apple M1
7578 Points ∼100% +404%
HP Pavilion 13-bb0015cl
Intel Core i7-1165G7
4964 Points ∼66% +230%
Apple MacBook Air 2020 i3
Intel Core i3-1000NG4
2028 Points ∼27% +35%
Microsoft Surface Go 2, m3-8100Y
Intel Core m3-8100Y
1615 Points ∼21% +7%
Average Intel Celeron N4120
  (1505 - 1509, n=2)
1507 Points ∼20% 0%
Chuwi LarkBook CWI509
Intel Celeron N4120
1505 Points ∼20%
Jumper Tech Ez Book X3 Air
Intel Celeron N4100
1407 Points ∼19% -7%
GMK NucBox K1
Intel Celeron J4125
1394 Points ∼18% -7%
HWBOT x265 Benchmark v2.2 / 4k Preset
HP Pavilion 13-bb0015cl
Intel Core i7-1165G7
5.96 fps ∼100% +355%
Dell XPS 13 7390 2-in-1 Core i3
Intel Core i3-1005G1
3.122 fps ∼52% +138%
Apple MacBook Air 2020 i3
Intel Core i3-1000NG4
2.23 fps ∼37% +70%
Microsoft Surface Go 2, m3-8100Y
Intel Core m3-8100Y
1.96 fps ∼33% +50%
GMK NucBox K1
Intel Celeron J4125
1.46 fps ∼24% +11%
Average Intel Celeron N4120
  (1.31 - 1.38, n=2)
1.345 fps ∼23% +3%
Chuwi LarkBook CWI509
Intel Celeron N4120
1.31 fps ∼22%
Jumper Tech Ez Book X3 Air
Intel Celeron N4100
1.24 fps ∼21% -5%
Chuwi LapBook Plus
Intel Atom x7-E3950
0.98 fps ∼16% -25%
LibreOffice / 20 Documents To PDF
Jumper Tech Ez Book X3 Air
Intel Celeron N4100
155 s * ∼100% -18%
Average Intel Celeron N4120
  (131 - 136, n=2)
134 s * ∼86% -2%
Chuwi LarkBook CWI509
Intel Celeron N4120
131 s * ∼85%
GMK NucBox K1
Intel Celeron J4125
124 s * ∼80% +5%
Apple MacBook Air 2020 i3
Intel Core i3-1000NG4
97.8 s * ∼63% +25%
Microsoft Surface Go 2, m3-8100Y
Intel Core m3-8100Y
85.4 s * ∼55% +35%
HP Pavilion 13-bb0015cl
Intel Core i7-1165G7
47.6 s * ∼31% +64%
Apple MacBook Air 2020 M1 Entry
Apple M1
12.88 s * ∼8% +90%
R Benchmark 2.5 / Overall mean
Jumper Tech Ez Book X3 Air
Intel Celeron N4100
1.756 sec * ∼100% -7%
Average Intel Celeron N4120
  (1.642 - 1.645, n=2)
1.644 sec * ∼94% -0%
Chuwi LarkBook CWI509
Intel Celeron N4120
1.642 sec * ∼94%
GMK NucBox K1
Intel Celeron J4125
1.577 sec * ∼90% +4%
Microsoft Surface Go 2, m3-8100Y
Intel Core m3-8100Y
0.942 sec * ∼54% +43%
Apple MacBook Air 2020 i3
Intel Core i3-1000NG4
0.918 sec * ∼52% +44%
Apple MacBook Air 2020 M1 Entry
Apple M1
0.732 sec * ∼42% +55%
HP Pavilion 13-bb0015cl
Intel Core i7-1165G7
0.554 sec * ∼32% +66%
Cinebench R15: CPU Multi 64Bit | CPU Single 64Bit
Cinebench R20: CPU (Multi Core) | CPU (Single Core)
7-Zip 18.03: 7z b 4 -mmt1 | 7z b 4
Geekbench 5.3: 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

* ... smaller is better

Cinebench R10 Rendering Multiple CPUs 32Bit
6432
Cinebench R10 Shading 32Bit
3452
Cinebench R10 Rendering Single 32Bit
2159
Cinebench R11.5 CPU Multi 64Bit
2.68 Points
Cinebench R11.5 OpenGL 64Bit
9.02 fps
Cinebench R11.5 CPU Single 64Bit
0.88 Points
Cinebench R15 CPU Single 64Bit
73.2 Points
Cinebench R15 Ref. Match 64Bit
97.8 %
Cinebench R15 OpenGL 64Bit
16.9 fps
Cinebench R15 CPU Multi 64Bit
224 Points
Help

System Performance

PCMark 8 Home Accelerated
PCMark 8 Home Accelerated

We ran into Windows Update issues on our test unit and certain benchmarks like PCMark 10 or Blender wouldn't even run properly. Thus, we're only able to provide our PCMark 8 Home Accelerated test results below. Scores are about half that of the Asus VivoBook S13 equipped with an older but more capable Core i5-8550U.

PCMark 8 - Home Score Accelerated v2
Dell XPS 13 9310 Core i7 FHD
Iris Xe G7 96EUs, i7-1165G7, Micron 2300 512GB MTFDHBA512TDV
4407 Points ∼70% +134%
HP Pavilion 13-bb0015cl
Iris Xe G7 96EUs, i7-1165G7, Samsung PM991 MZVLQ512HALU
3769 Points ∼60% +100%
Asus VivoBook S13 S330UA-EY034T
UHD Graphics 620, i5-8550U, Kingston RBU-SNS8180DS3512GJ
3566 Points ∼57% +89%
Chuwi LarkBook CWI509
UHD Graphics 600, Celeron N4120, Kingston RBUSNS8180DS3256GJ
1884 Points ∼30%
Average Intel Celeron N4120, Intel UHD Graphics 600
 
1884 Points ∼30% 0%
PCMark 8 Home Score Accelerated v2
1884 points
Help

DPC Latency

LatencyMon reveals DPC latency issues related to Ndis.sys. Furthermore, 4K UHD video playback at 60 FPS is imperfect with 15 dropped frames during our minute-long YouTube test. We had to rerun this test twice because the CPU would periodically jump to 100 percent utilization and drop even more frames during our first run. Don't plan on doing any multi-tasking when streaming 4K video without incurring noticeable frame drops.

DPC Latencies / LatencyMon - interrupt to process latency (max), Web, Youtube, Prime95
Chuwi LarkBook CWI509
UHD Graphics 600, Celeron N4120, Kingston RBUSNS8180DS3256GJ
2390.18 μs * ∼100%
HP Pavilion 13-bb0015cl
Iris Xe G7 96EUs, i7-1165G7, Samsung PM991 MZVLQ512HALU
2333.87 μs * ∼98% +2%
GMK NucBox K1
UHD Graphics 600, Celeron J4125, HIKVision C100 NGFF SSD 128GB
1716.8 μs * ∼72% +28%
Jumper Tech Ez Book X3 Air
UHD Graphics 600, Celeron N4100, 128 GB NVMe
1009.8 μs * ∼42% +58%
Dell XPS 13 9310 Core i7 FHD
Iris Xe G7 96EUs, i7-1165G7, Micron 2300 512GB MTFDHBA512TDV
1008.7 μs * ∼42% +58%

* ... smaller is better

Storage Devices

Our unit ships with a 256 GB SATA III M.2 SSD from Kingston. Sequential read and write rates are good at over 400 MB/s each. NVMe drives, which are not compatible with the LarkBook, are both faster and more expensive.

See our table of HDDs and SSDs for more benchmark comparisons.

AS SSD
AS SSD
CDM 5.5
CDM 5.5
2x M.2 SATA III slots
2x M.2 SATA III slots
Chuwi LarkBook CWI509
Kingston RBUSNS8180DS3256GJ
Dell XPS 13 9310 Core i7 FHD
Micron 2300 512GB MTFDHBA512TDV
Lenovo IdeaPad S540-13API
Samsung SSD PM981 MZVLB512HAJQ
HP Pavilion 13-bb0015cl
Samsung PM991 MZVLQ512HALU
Asus VivoBook S13 S330UA-EY034T
Kingston RBU-SNS8180DS3512GJ
AS SSD
164%
202%
122%
-8%
Copy Game MB/s
415.26
1450.93
249%
1181.67
185%
151.04
-64%
Copy Program MB/s
198.62
613.48
209%
806.48
306%
106.15
-47%
Copy ISO MB/s
473.62
1543.52
226%
1282.61
171%
546.41
15%
Score Total
1931
3499
81%
4054
110%
2586
34%
1150
-40%
Score Write
418
1880
350%
1814
334%
996
138%
537
28%
Score Read
999
1086
9%
1486
49%
1070
7%
403
-60%
Access Time Write *
0.189
0.365
-93%
0.043
77%
0.081
57%
0.174
8%
Access Time Read *
0.175
0.066
62%
0.069
61%
0.064
63%
0.108
38%
4K-64 Write
328.51
1636.39
398%
1467.66
347%
777.89
137%
439.87
34%
4K-64 Read
928.27
827.43
-11%
1159.31
25%
861.9
-7%
323.82
-65%
4K Write
48.14
104.2
116%
89.51
86%
128.39
167%
61.58
28%
4K Read
28.45
49.29
73%
47.14
66%
44.66
57%
30.94
9%
Seq Write
417.09
1395.67
235%
2564.3
515%
896.32
115%
351.05
-16%
Seq Read
425.63
2091.45
391%
2791.8
556%
1631.82
283%
485.47
14%
CrystalDiskMark 5.2 / 6
285%
319%
176%
17%
Write 4K
63.86
97.48
53%
133.9
110%
96.46
51%
64.54
1%
Read 4K
34.38
50.92
48%
44.98
31%
36.81
7%
24.91
-28%
Write Seq
373.9
1811
384%
2730
630%
1168
212%
453.4
21%
Read Seq
411.7
1836
346%
2403
484%
1476
259%
424.9
3%
Write 4K Q32T1
124.1
521.4
320%
252.2
103%
389.5
214%
257.8
108%
Read 4K Q32T1
139.5
357.5
156%
335.6
141%
347.8
149%
200.4
44%
Write Seq Q32T1
500.4
2879
475%
2983
496%
1398
179%
504.2
1%
Read Seq Q32T1
537
3204
497%
3535
558%
2364
340%
459.6
-14%
Write 4K Q8T8
284.4
Read 4K Q8T8
301.2
Total Average (Program / Settings)
225% / 208%
261% / 252%
149% / 142%
5% / 1%

* ... smaller is better

Kingston RBUSNS8180DS3256GJ
CDM 5/6 Read Seq Q32T1: 537 MB/s
CDM 5/6 Write Seq Q32T1: 500.4 MB/s
CDM 5/6 Read 4K Q32T1: 139.5 MB/s
CDM 5/6 Write 4K Q32T1: 124.1 MB/s
CDM 5 Read Seq: 411.7 MB/s
CDM 5 Write Seq: 373.9 MB/s
CDM 5/6 Read 4K: 34.38 MB/s
CDM 5/6 Write 4K: 63.86 MB/s

Disk Throttling: DiskSpd Read Loop, Queue Depth 8

0102030405060708090100110120130140150160170180190200210220230240250260270280290300310320330340350360370380390400410420430440450460470Tooltip
: Ø456 (422.16-465.27)

GPU Performance

The UHD Graphics 600 is over 50 percent slower than the already slow UHD Graphics 620. It barely manages to run DOTA 2 at the lowest settings above 30 FPS. This is no gaming machine, after all.

Note that graphics performance is about two times slower than on the Core i3-8100Y even though their multi-thread CPU performances are comparable.

3DMark 11
3DMark 11
Cloud Gate
Cloud Gate
Fire Strike
Fire Strike
Time Spy
Time Spy
3DMark
2560x1440 Time Spy Graphics
HP Pavilion 13-bb0015cl
Intel Iris Xe Graphics G7 96EUs, i7-1165G7
1351 Points ∼100% +1026%
Microsoft Surface Laptop Go Core i5
Intel UHD Graphics G1 (Ice Lake 32 EU), i5-1035G1
440 Points ∼33% +267%
Microsoft Surface Go 2, m3-8100Y
Intel UHD Graphics 615, m3-8100Y
259 Points ∼19% +116%
Chuwi LapBook Plus
Intel HD Graphics 505, x7-E3950
142 Points ∼11% +18%
Jumper Tech Ez Book X3 Air
Intel UHD Graphics 600, Celeron N4100
123 Points ∼9% +3%
GMK NucBox K1
Intel UHD Graphics 600, Celeron J4125
120 Points ∼9% 0%
Chuwi LarkBook CWI509
Intel UHD Graphics 600, Celeron N4120
120 Points ∼9%
Average Intel UHD Graphics 600
  (85 - 123, n=9)
108 Points ∼8% -10%
1920x1080 Fire Strike Graphics
HP Pavilion 13-bb0015cl
Intel Iris Xe Graphics G7 96EUs, i7-1165G7
4577 Points ∼100% +870%
Lenovo IdeaPad S540-13API
AMD Radeon RX Vega 8 (Ryzen 2000/3000), R5 3550H
2594 Points ∼57% +450%
Lenovo ThinkPad X395
AMD Radeon RX Vega 6 (Ryzen 2000/3000), R3 PRO 3300U
2245 Points ∼49% +376%
Microsoft Surface Laptop Go Core i5
Intel UHD Graphics G1 (Ice Lake 32 EU), i5-1035G1
1713 Points ∼37% +263%
Dell XPS 13 7390 2-in-1 Core i3
Intel UHD Graphics G1 (Ice Lake 32 EU), i3-1005G1
1521 Points ∼33% +222%
Asus VivoBook S13 S330UA-EY034T
Intel UHD Graphics 620, i5-8550U
1320 Points ∼29% +180%
Apple MacBook Air 2020 i3
Intel Iris Plus Graphics G4 (Ice Lake 48 EU), i3-1000NG4
922 Points ∼20% +95%
Microsoft Surface Go 2, m3-8100Y
Intel UHD Graphics 615, m3-8100Y
866 Points ∼19% +83%
Apple MacBook 12 (Early 2016) 1.1 GHz
Intel HD Graphics 515, 6Y30
735 Points ∼16% +56%
Jumper Tech Ez Book X3 Air
Intel UHD Graphics 600, Celeron N4100
486 Points ∼11% +3%
Chuwi LarkBook CWI509
Intel UHD Graphics 600, Celeron N4120
472 Points ∼10%
GMK NucBox K1
Intel UHD Graphics 600, Celeron J4125
433 Points ∼9% -8%
Average Intel UHD Graphics 600
  (315 - 486, n=14)
416 Points ∼9% -12%
HP x2 210 G2
Intel HD Graphics 400 (Braswell), Z8350
234 Points ∼5% -50%
1280x720 Cloud Gate Standard Graphics
HP Pavilion 13-bb0015cl
Intel Iris Xe Graphics G7 96EUs, i7-1165G7
21542 Points ∼100% +448%
Lenovo ThinkPad X395
AMD Radeon RX Vega 6 (Ryzen 2000/3000), R3 PRO 3300U
16787 Points ∼78% +327%
Microsoft Surface Laptop Go Core i5
Intel UHD Graphics G1 (Ice Lake 32 EU), i5-1035G1
11894 Points ∼55% +202%
Dell XPS 13 7390 2-in-1 Core i3
Intel UHD Graphics G1 (Ice Lake 32 EU), i3-1005G1
10966 Points ∼51% +179%
Asus VivoBook S13 S330UA-EY034T
Intel UHD Graphics 620, i5-8550U
10677 Points ∼50% +172%
Microsoft Surface Go 2, m3-8100Y
Intel UHD Graphics 615, m3-8100Y
6564 Points ∼30% +67%
Apple MacBook 12 (Early 2016) 1.1 GHz
Intel HD Graphics 515, 6Y30
6078 Points ∼28% +55%
Chuwi LapBook Plus
Intel HD Graphics 505, x7-E3950
3997 Points ∼19% +2%
Chuwi LarkBook CWI509
Intel UHD Graphics 600, Celeron N4120
3932 Points ∼18%
Average Intel UHD Graphics 600
  (2714 - 3932, n=13)
3386 Points ∼16% -14%
GMK NucBox K1
Intel UHD Graphics 600, Celeron J4125
3366 Points ∼16% -14%
HP x2 210 G2
Intel HD Graphics 400 (Braswell), Z8350
1841 Points ∼9% -53%
Chuwi HeroBook 14
Intel HD Graphics 400 (Braswell), E8000
1594 Points ∼7% -59%
3DMark 11
1280x720 Performance Combined
HP Pavilion 13-bb0015cl
Intel Iris Xe Graphics G7 96EUs, i7-1165G7
4586 Points ∼100% +652%
Lenovo IdeaPad S540-13API
AMD Radeon RX Vega 8 (Ryzen 2000/3000), R5 3550H
2941 Points ∼64% +382%
Lenovo ThinkPad X395
AMD Radeon RX Vega 6 (Ryzen 2000/3000), R3 PRO 3300U
2589 Points ∼56% +324%
Dell XPS 13 7390 2-in-1 Core i3
Intel UHD Graphics G1 (Ice Lake 32 EU), i3-1005G1
2375 Points ∼52% +289%
Microsoft Surface Laptop Go Core i5
Intel UHD Graphics G1 (Ice Lake 32 EU), i5-1035G1
1989 Points ∼43% +226%
Asus VivoBook S13 S330UA-EY034T
Intel UHD Graphics 620, i5-8550U
1928 Points ∼42% +216%
Apple MacBook Air 2020 i3
Intel Iris Plus Graphics G4 (Ice Lake 48 EU), i3-1000NG4
1352 Points ∼29% +122%
Microsoft Surface Go 2, m3-8100Y
Intel UHD Graphics 615, m3-8100Y
1260 Points ∼27% +107%
Apple MacBook 12 (Early 2016) 1.1 GHz
Intel HD Graphics 515, 6Y30
1014 Points ∼22% +66%
Chuwi LapBook Plus
Intel HD Graphics 505, x7-E3950
754 Points ∼16% +24%
Chuwi LarkBook CWI509
Intel UHD Graphics 600, Celeron N4120
610 Points ∼13%
Trekstor Primebook C13
Intel HD Graphics 500, Celeron N3350
571 Points ∼12% -6%
Jumper Tech Ez Book X3 Air
Intel UHD Graphics 600, Celeron N4100
564 Points ∼12% -8%
GMK NucBox K1
Intel UHD Graphics 600, Celeron J4125
546 Points ∼12% -10%
Average Intel UHD Graphics 600
  (362 - 791, n=20)
534 Points ∼12% -12%
HP x2 210 G2
Intel HD Graphics 400 (Braswell), Z8350
392 Points ∼9% -36%
Chuwi HeroBook 14
Intel HD Graphics 400 (Braswell), E8000
319 Points ∼7% -48%
1280x720 Performance GPU
HP Pavilion 13-bb0015cl
Intel Iris Xe Graphics G7 96EUs, i7-1165G7
6578 Points ∼100% +985%
Lenovo IdeaPad S540-13API
AMD Radeon RX Vega 8 (Ryzen 2000/3000), R5 3550H
4164 Points ∼63% +587%
Lenovo ThinkPad X395
AMD Radeon RX Vega 6 (Ryzen 2000/3000), R3 PRO 3300U
3325 Points ∼51% +449%
Microsoft Surface Laptop Go Core i5
Intel UHD Graphics G1 (Ice Lake 32 EU), i5-1035G1
2280 Points ∼35% +276%
Dell XPS 13 7390 2-in-1 Core i3
Intel UHD Graphics G1 (Ice Lake 32 EU), i3-1005G1
2133 Points ∼32% +252%
Asus VivoBook S13 S330UA-EY034T
Intel UHD Graphics 620, i5-8550U
1949 Points ∼30% +222%
Apple MacBook Air 2020 i3
Intel Iris Plus Graphics G4 (Ice Lake 48 EU), i3-1000NG4
1941 Points ∼30% +220%
Microsoft Surface Go 2, m3-8100Y
Intel UHD Graphics 615, m3-8100Y
1378 Points ∼21% +127%
Apple MacBook 12 (Early 2016) 1.1 GHz
Intel HD Graphics 515, 6Y30
1186 Points ∼18% +96%
Chuwi LapBook Plus
Intel HD Graphics 505, x7-E3950
765 Points ∼12% +26%
Chuwi LarkBook CWI509
Intel UHD Graphics 600, Celeron N4120
606 Points ∼9%
Jumper Tech Ez Book X3 Air
Intel UHD Graphics 600, Celeron N4100
603 Points ∼9% 0%
GMK NucBox K1
Intel UHD Graphics 600, Celeron J4125
589 Points ∼9% -3%
Trekstor Primebook C13
Intel HD Graphics 500, Celeron N3350
543 Points ∼8% -10%
Average Intel UHD Graphics 600
  (410 - 638, n=20)
542 Points ∼8% -11%
HP x2 210 G2
Intel HD Graphics 400 (Braswell), Z8350
349 Points ∼5% -42%
Chuwi HeroBook 14
Intel HD Graphics 400 (Braswell), E8000
247 Points ∼4% -59%
3DMark 06 Standard
4151 points
3DMark 11 Performance
685 points
3DMark Cloud Gate Standard Score
3372 points
3DMark Fire Strike Score
439 points
3DMark Time Spy Score
137 points
Help
low med. high ultra
Dota 2 Reborn (2015) 38.9 15.2 8 7.4 fps
X-Plane 11.11 (2018) 6.92 4.68 4.26 fps

Emissions

Temperature

The laptop will always be warmer on its left half than the right half due to how the motherboard is positioned inside. Hot spots can become as warm as 41 C to 47 C when under high loads which we find to be noticeable but not vexing.

No internal fan means no exhaust grilles
No internal fan means no exhaust grilles
AC adapter after running high loads for over an hour
AC adapter after running high loads for over an hour
No internal fan or heat pipes
No internal fan or heat pipes
Max. Load
 36.2 °C
97 F
41 °C
106 F
28.8 °C
84 F
 
 36 °C
97 F
35.6 °C
96 F
27.4 °C
81 F
 
 30.2 °C
86 F
28.2 °C
83 F
26.8 °C
80 F
 
Maximum: 41 °C = 106 F
Average: 32.2 °C = 90 F
32.6 °C
91 F
46.8 °C
116 F
40.4 °C
105 F
30 °C
86 F
38.2 °C
101 F
37.2 °C
99 F
29.4 °C
85 F
32.6 °C
91 F
33.6 °C
92 F
Maximum: 46.8 °C = 116 F
Average: 35.6 °C = 96 F
Power Supply (max.)  39 °C = 102 F | Room Temperature 20 °C = 68 F | Fluke 62 Mini IR Thermometer
(±) The average temperature for the upper side under maximal load is 32.2 °C / 90 F, compared to the average of 30.6 °C / 87 F for the devices in the class Subnotebook.
(±) The maximum temperature on the upper side is 41 °C / 106 F, compared to the average of 35.7 °C / 96 F, ranging from 22 to 57 °C for the class Subnotebook.
(-) The bottom heats up to a maximum of 46.8 °C / 116 F, compared to the average of 39.5 °C / 103 F
(+) In idle usage, the average temperature for the upper side is 22.3 °C / 72 F, compared to the device average of 30.6 °C / 87 F.
(+) The palmrests and touchpad are cooler than skin temperature with a maximum of 30.2 °C / 86.4 F and are therefore cool to the touch.
(±) The average temperature of the palmrest area of similar devices was 28.4 °C / 83.1 F (-1.8 °C / -3.3 F).
System idle (top)
System idle (top)
System idle (bottom)
System idle (bottom)
Prime95+FurMark stress (top)
Prime95+FurMark stress (top)
Prime95+FurMark stress (bottom)
Prime95+FurMark stress (bottom)

Stress Test

Running Prime95 causes the CPU to boost to 2.5 GHz for about 15 seconds until reaching a core temperature of 86 C. Thereafter, clock rates and temperature would drop to 1.9 GHz and plateau at 76 C, respectively. The limited Turbo Boost potential is to be expected from a passively-cooled laptop.

Running on battery power will not limit performance. A 3DMark 11 test on batteries would return nearly identical scores.

System idle
System idle
Prime95 stress
Prime95 stress
Prime95+FurMark stress
Prime95+FurMark stress
CPU Clock (GHz) GPU Clock (MHz) Average CPU Temperature (°C)
System Idle -- -- 36
Prime95 Stress 1.9 - 2.0 -- 76
Prime95 + FurMark Stress 1.5 - 1.6 150 73

Speakers

Quad speakers (Two near bottom corners with two more along the keyboard edges)
Quad speakers (Two near bottom corners with two more along the keyboard edges)
Pink noise at maximum volume. The speakers are loud and with limited bass reproduction
Pink noise at maximum volume. The speakers are loud and with limited bass reproduction
dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2040.637.940.62535.730.635.73130.827.530.84030.426.230.4503027.4306334.633.934.68031.226.731.210026.525.126.512528.927.628.916039.325.539.320050.82450.825057.321.357.331559.522.759.540060.72160.750056.219.756.263062.319.162.380068.316.568.3100069.116.469.1125070.115.170.1160073.115.873.1200068.114.768.1250070.71570.7315065.614.365.6400063.213.563.2500066.113.466.1630073.113.373.1800075.913.475.91000073.913.373.91250071.913.171.91600065.912.365.9SPL82.428.382.4N52.51.152.5median 65.9median 15.8median 65.9Delta7.14.57.135.335.132.931.831.83236.535.132.428.93328.936.328.848.32761.52752.924.860.92462.822.763.32269.521.267.82174.82075.919.472.718.97117.770.117.86917.671.817.668.117.671.417.673.717.670.417.571.617.671.617.669.617.459.717.583.630.662.51.5median 69.6median 17.84.62.4hearing rangehide median Pink NoiseChuwi LarkBook CWI509Apple MacBook 12 (Early 2016) 1.1 GHz
Frequency diagram (checkboxes can be checked and unchecked to compare devices)
Chuwi LarkBook CWI509 audio analysis

(+) | speakers can play relatively loud (82.4 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 22.2% lower than median
(±) | linearity of bass is average (12.6% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 4.7% away from median
(+) | mids are linear (6.9% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 4.7% away from median
(±) | linearity of highs is average (7% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (18.2% difference to median)
Compared to same class
» 47% of all tested devices in this class were better, 10% similar, 43% worse
» The best had a delta of 7%, average was 19%, worst was 50%
Compared to all devices tested
» 33% of all tested devices were better, 7% similar, 60% 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 7%, average was 19%, 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

Power Consumption

Idling on desktop consumes between 5 W and 9 W which is not all that different from the usual Core i-powered laptop even though the Chuwi is passively cooled and significantly slower. We're able to record a temporary maximum draw of 27.8 W from the small (5.5 x 5.5 x 3 cm) 24 W AC adapter as shown by the graphs before thermal throttling kicks in.

Prime95 initiated at 10s mark. Clock rates are highest during the first few seconds where power consumption is highest
Prime95 initiated at 10s mark. Clock rates are highest during the first few seconds where power consumption is highest
Prime95+FurMark initiated at 10s mark. Consumption would spike to 28 W for about 15 seconds before falling and stabilizing at 19 W
Prime95+FurMark initiated at 10s mark. Consumption would spike to 28 W for about 15 seconds before falling and stabilizing at 19 W
Consumption while running 3DMark 06
Consumption while running 3DMark 06
Power Consumption
Off / Standbydarklight 0.9 / 1 Watt
Idledarkmidlight 5.2 / 7.3 / 8.9 Watt
Load midlight 18.1 / 27.8 Watt
 color bar
Key: min: dark, med: mid, max: light        Metrahit Energy
Chuwi LarkBook CWI509
Celeron N4120, UHD Graphics 600, Kingston RBUSNS8180DS3256GJ, IPS, 1920x1080, 13.30
Apple MacBook Air 2020 M1 Entry
M1, M1 7-Core GPU, Apple SSD AP0256Q, IPS, 2560x1600, 13.30
Dell XPS 13 9310 Core i7 FHD
i7-1165G7, Iris Xe G7 96EUs, Micron 2300 512GB MTFDHBA512TDV, IPS, 1920x1200, 13.40
Lenovo IdeaPad S540-13API
R5 3550H, Vega 8, Samsung SSD PM981 MZVLB512HAJQ, IPS, 2560x1600, 13.30
HP Pavilion 13-bb0015cl
i7-1165G7, Iris Xe G7 96EUs, Samsung PM991 MZVLQ512HALU, IPS, 3840x2160, 13.30
Asus VivoBook S13 S330UA-EY034T
i5-8550U, UHD Graphics 620, Kingston RBU-SNS8180DS3512GJ, IPS LED, 1920x1080, 13.30
Power Consumption
10%
-23%
-41%
-53%
-38%
Idle Minimum *
5.2
1.9
63%
3.9
25%
5.6
-8%
4.6
12%
2.8
46%
Idle Average *
7.3
6.4
12%
5.9
19%
8.2
-12%
10.6
-45%
5
32%
Idle Maximum *
8.9
7
21%
6.3
29%
9.1
-2%
11.4
-28%
8.3
7%
Load Average *
18.1
25
-38%
39.7
-119%
37.6
-108%
43.2
-139%
42.8
-136%
Load Maximum *
27.8
30.3
-9%
47.5
-71%
48.3
-74%
46
-65%
65.8
-137%
Witcher 3 ultra *
34.8
39.9

* ... smaller is better

Battery Life

Runtimes are short at just under 4.5 hours of constant WLAN use. Furthermore, charging from empty to full capacity is very slow at almost 3 full hours. The system cannot be recharged via USB-C.

Battery Runtime
NBC WiFi Websurfing Battery Test 1.3
4h 26min
Chuwi LarkBook CWI509
Celeron N4120, UHD Graphics 600, 34.8 Wh
Apple MacBook Air 2020 M1 Entry
M1, M1 7-Core GPU, 49.9 Wh
Dell XPS 13 9310 Core i7 FHD
i7-1165G7, Iris Xe G7 96EUs, 52 Wh
Lenovo IdeaPad S540-13API
R5 3550H, Vega 8, 56 Wh
HP Pavilion 13-bb0015cl
i7-1165G7, Iris Xe G7 96EUs, 43 Wh
Asus VivoBook S13 S330UA-EY034T
i5-8550U, UHD Graphics 620, 42 Wh
Battery Runtime
261%
147%
136%
1%
88%
Reader / Idle
1800
649
WiFi v1.3
266
960
261%
657
147%
627
136%
269
1%
501
88%
Load
193
78

Pros

+ over 90 percent sRGB coverage
+ no fan; silent operation
+ DisplayPort-over-USB-C
+ sleek chassis design
+ 2x M.2 SATA III slots
+ high contrast ratio
+ relatively cheap
+ loud speakers
+ lightweight

Cons

- blurry webcam especially around the edges and corners
- dropped frames during 4K UHD video playback
- very poorly calibrated display out of the box
- no support for USB-C Power Delivery
- PWM on almost all brightness levels
- no IR camera or fingerprint reader
- very slow CPU performance
- slow wireless performance
- no keyboard backlight
- long charging time
- short battery life

Verdict

In review: Chuwi LarkBook CWI509. Test unit provided by Chuwi
In review: Chuwi LarkBook CWI509. Test unit provided by Chuwi

Unless if you can find one deeply discounted, the Chuwi LarkBook is a little costly at its MSRP of nearly $500 USD. You would be better off investing in a four-year old Dell XPS 13 as even a Core i3-powered configuration will run laps around the LarkBook. The longevity of the LarkBook is also questionable as we've had issues related to the hinges and keyboard keys of earlier Chuwi test units like the AeroBook.

The sleek design and crisp IPS display are dragged down by the slow processor performance and imperfect 4K UHD video playback.

The LarkBook is visually attractive and its display is actually pretty good after calibration. As a primary laptop for streaming and browsing, however, you're going to want something faster and longer-lasting.

Price and availability

The Chuwi LarkBook is currently available on the official Chuwi online store for about $400 to $500 USD.

Chuwi LarkBook CWI509 - 12/31/2020 v7
Allen Ngo

Chassis
78 / 98 → 80%
Keyboard
71%
Pointing Device
72%
Connectivity
47 / 75 → 62%
Weight
74 / 20-75 → 98%
Battery
60%
Display
75%
Games Performance
21 / 78 → 26%
Application Performance
61 / 85 → 72%
Temperature
91%
Noise
100%
Audio
79 / 91 → 87%
Camera
26 / 85 → 31%
Average
66%
77%
Subnotebook - Weighted Average

Pricecompare

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> Notebook / Laptop Reviews and News > Reviews > Chuwi LarkBook Laptop Review: Good Looks, Poor Performance
Allen Ngo, 2020-12-31 (Update: 2020-12-31)
Allen Ngo
Allen Ngo - US Editor in Chief
After graduating with a B.S. in environmental hydrodynamics from the University of California, I studied reactor physics to become licensed by the U.S. NRC to operate nuclear reactors. There's a striking level of appreciation you gain for everyday consumer electronics after working with modern nuclear reactivity systems astonishingly powered by computers from the 80s. When I'm not managing day-to-day activities and US review articles on Notebookcheck, you can catch me following the eSports scene and the latest gaming news.