Notebookcheck

Trekstor Yourbook C11B (N3350, eMMC, FHD) Convertible Review

Sascha Mölck, 👁 Sebastian Jentsch (translated by Alex Alderson), 11/06/2018

Student convertible. The Trekstor Yourbook C11B is an 11.6-inch convertible that has an IPS touchscreen display, a fanless design and good battery life. The device even comes with a year’s MS Office 365 Personal and a one-year premium Sofatutor.com license.

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The Trekstor Yourbook C11B is an 11.6-inch convertible that the company has designed primarily for students. Correspondingly, the device comes with subscriptions to learning applications and services like MS Office 365 Personal. The C11B is powered by an Intel Apollo Lake processor that is not particularly powerful and is the sister model to the Trekstor Primebook C11, a device that we have already reviewed.

We have chosen to compare the C11B against the Lenovo Yoga 330-11IGM, the Medion Akoya E2228T, the Dell Chromebook 11 3181 2-in-1 and the ASUS VivoBook Flip 12 TP203NAH.

Trekstor Yourbook C11B
Graphics adapter
Intel HD Graphics 500, Core: 200-650 MHz, Dual-Channel, 25.20.100.6326
Memory
4096 MB 
, DDR3-1600, dual-channel soldered RAM, no SO-DIMM slots
Display
11.6 inch 16:9, 1920 x 1080 pixel 190 PPI, Capacitive ten-point multitouch , LC116LF1L01, IPS, glossy: yes
Storage
64 GB eMMC Flash, 64 GB 
, 40.8 GB free
Soundcard
RealTek ALC269 @ Intel Apollo Lake SoC - High Definition Audio Controller
Connections
3 USB 3.0 / 3.1 Gen1, 1 HDMI, 1 DisplayPort, Audio Connections: Combined headphone and microphone 3.5 mm jack, Card Reader: MicroSD, 1 Fingerprint Reader, Sensors: G-sensor, Hall sensor, TPM 2.0
Networking
Intel Dual Band Wireless-AC 3165 (a/b/g/n/ac), Bluetooth 4.2
Size
height x width x depth (in mm): 15 x 280 x 190 ( = 0.59 x 11.02 x 7.48 in)
Battery
36.48 Wh, 4800 mAh Lithium-Ion, 7.6 V
Operating System
Microsoft Windows 10 Home 64 Bit
Camera
Webcam: Full HD
Primary Camera: 2 MPix
Additional features
Speakers: Stereo, Keyboard: Chiclet, Keyboard Light: no, Sofatutor Premium 1-year license, MS Office 365 Personal 1-year license, Digital KLETT school books, PONS online dictionary, 24 Months Warranty, fanless
Weight
1.16 kg ( = 40.92 oz / 2.56 pounds), Power Supply: 125 g ( = 4.41 oz / 0.28 pounds)
Price
399 Euro
Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

 

Case & Connectivity

Our test device is completely black, but Trekstor also sells a pink version should you prefer more distinctive-looking laptops. Trekstor has designed the C11B using a mixture of metal and plastic. The display lid and bottom case are metal, while the rest of the device is made of plastic. Our test device is well-built with no manufacturing flaws or uneven gaps between materials. Moreover, the device is sturdy and withstood our attempts to bend or twist it. The bottom case could be stiffer, but overall the C11B is a robust device for the money. The battery is not replaceable without removing the entire bottom case though.

The C11B has a surprisingly good selection of ports considering its price. There are two USB 3.1 Type-A ports and a USB 3.1 Gen 1 Type-C port, which supports charging, data transfer and video output. The Type-C port is not Thunderbolt 3, but this would be redundant in such an underpowered device. Trekstor has included a micro HDMI port too along with a headphone jack, a charging port and a microSD-card slot. Effectively, the C11B has two video outputs and two charging ports; you cannot charge the device faster with two power supplies though.

Trekstor has equipped the C11B with a USB 2.0 microSD-card slot, which is in line with our comparison devices. Our test device achieved a maximum transfer speed of 25.8 MB/s when copying large blocks of data with our 64 GB Toshiba Exceria Pro M501 microSDXC reference card, which puts it second bottom in our comparison table.

Our test device has an Intel Dual Band Wireless-AC 3165 Wi-Fi card, which supports IEEE 802.11 a/b/g/n/ac Wi-Fi standards, the latter of which we do not always see in devices at this price. The device only has a 1x1 MIMO antenna, which puts it on par with our comparison devices in our iperf3 Client Wi-Fi tests.

Trekstor preinstalls the C11B with Windows 10 Home with S mode enabled, which restricts users to only installing programs from the Microsoft Store. S-mode can be deactivated though, the instructions for which Microsoft lists on its FAQ pages.

Our test device came with plenty of software preinstalled to help students with their studies. Trekstor includes a one-year license for MS Office 365 Personal, Sofatutor.com, Klett digital textbooks, Pons online dictionary and an Intel software suite. Our test device also had a German-language manual in the book that describes how to install and activate the various software packages for which Trekstor includes licences.

Size Comparison

Connectivity

Right-hand side: power button, MicroSD card reader, USB 3.1 Gen 1 Type-A, 3.5 mm jack, power connector
Right-hand side: power button, MicroSD card reader, USB 3.1 Gen 1 Type-A, 3.5 mm jack, power connector
Left-hand side: USB 3.1 Gen 1 Type-C, micro-HDMI, USB 3.1 Gen 1 Type-A
Left-hand side: USB 3.1 Gen 1 Type-C, micro-HDMI, USB 3.1 Gen 1 Type-A
SDCardreader Transfer Speed
average JPG Copy Test (av. of 3 runs)
Lenovo Yoga 330-11IGM
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
59.5 MB/s ∼100%
Average of class Convertible
  (7.5 - 197, n=103)
59 MB/s ∼99%
Asus VivoBook E12 E203NA-FD026T
  (Toshiba Exceria Pro M501 microSDXC 64GB)
24 MB/s ∼40%
Trekstor Primebook C11
  (Toshiba Exceria Pro M501 microSDXC 64GB)
22.4 MB/s ∼38%
Medion Akoya E2228T-MD61250
  (Toshiba Exceria Pro M501 microSDXC 64GB)
21.8 MB/s ∼37%
Dell Chromebook 11 3181 2-in-1
  (Toshiba Exceria Pro M501 UHS-II)
20.12 MB/s ∼34%
maximum AS SSD Seq Read Test (1GB)
Average of class Convertible
  (24 - 246, n=101)
74.7 MB/s ∼100% +190%
Lenovo Yoga 330-11IGM
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
67.5 MB/s ∼90% +162%
Asus VivoBook E12 E203NA-FD026T
  (Toshiba Exceria Pro M501 microSDXC 64GB)
39.5 MB/s ∼53% +53%
Medion Akoya E2228T-MD61250
  (Toshiba Exceria Pro M501 microSDXC 64GB)
30.2 MB/s ∼40% +17%
Trekstor Yourbook C11B
  (Toshiba Exceria Pro M501 microSDXC 64GB)
25.8 MB/s ∼35%
Trekstor Primebook C11
  (Toshiba Exceria Pro M501 microSDXC 64GB)
20.5 MB/s ∼27% -21%
Networking
iperf3 Client (receive) TCP 1 m 4M x10
Asus VivoBook Flip 12 TP203NAH-BP049T
Qualcomm Atheros QCA9377 Wireless Network Adapter
344 MBit/s ∼100% +12%
Asus VivoBook E12 E203NA-FD026T
Qualcomm Atheros QCA9377 Wireless Network Adapter
318 MBit/s ∼92% +4%
Trekstor Primebook C11
Intel Dual Band Wireless-AC 3165
309 MBit/s ∼90% +1%
Trekstor Yourbook C11B
Intel Dual Band Wireless-AC 3165
307 (min: 297, max: 318) MBit/s ∼89%
Lenovo Yoga 330-11IGM
Intel Dual Band Wireless-AC 3165
300 MBit/s ∼87% -2%
Medion Akoya E2228T-MD61250
Intel Dual Band Wireless-AC 3165
297 MBit/s ∼86% -3%
iperf3 Client (transmit) TCP 1 m 4M x10
Asus VivoBook E12 E203NA-FD026T
Qualcomm Atheros QCA9377 Wireless Network Adapter
341 MBit/s ∼100% +3%
Asus VivoBook Flip 12 TP203NAH-BP049T
Qualcomm Atheros QCA9377 Wireless Network Adapter
338 MBit/s ∼99% +2%
Trekstor Yourbook C11B
Intel Dual Band Wireless-AC 3165
330 (min: 274, max: 339) MBit/s ∼97%
Lenovo Yoga 330-11IGM
Intel Dual Band Wireless-AC 3165
310 MBit/s ∼91% -6%
Medion Akoya E2228T-MD61250
Intel Dual Band Wireless-AC 3165
271 MBit/s ∼79% -18%
Trekstor Primebook C11
Intel Dual Band Wireless-AC 3165
204 MBit/s ∼60% -38%

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0102030405060708090100110120130140150160170180190200210220230240250260270280290300310320330340Tooltip
Trekstor Yourbook C11B HD Graphics 500, N3350, 64 GB eMMC Flash; iperf3 Client (receive) TCP 1 m 4M x10; iperf 3.1.3: Ø306 (297-318)
Trekstor Yourbook C11B HD Graphics 500, N3350, 64 GB eMMC Flash; iperf3 Client (transmit) TCP 1 m 4M x10; iperf 3.1.3: Ø330 (274-339)

Input Devices

Our test device has an unlit chiclet QWERTZ keyboard that has slightly roughened keys. The keys have a short stroke and a clear pressure point that feels ok to type on, but they are a little too mushy for our liking. Moreover, the keyboard deck gives way slightly when typing. Overall, the keyboard’s shortcomings did not prove annoying during testing and the keyboard is decent considering the C11B’s price.

The multi-touch trackpad measures around 10.5 x 6 cm, within which Trekstor has integrated a fingerprint sensor. The sensor sits in the top left-hand corner of the trackpad, but it does not interfere with making multi-touch gestures. The trackpad has a smooth finish that is easy to use, while its two mouse buttons have a short stroke and a clear pressure point.

A look at the Yourbook C11B’s keyboard and trackpad
A look at the Yourbook C11B’s keyboard and trackpad

Display

Sub-pixel array
Sub-pixel array

The C11B has an 11.6-inch touchscreen display that operates at a 1920x1080 native resolution. Our test device has an average maximum brightness of 266.7 cd/m² according to X-Rite i1Pro 2, which is too dark for our liking. However, it is brighter than many of our comparison devices and should be bright enough for indoor use. Our test device also has an impressively low 0.28 cd/m² black value and a comparatively high 1,086:1 contrast ratio.

Unfortunately, our test device uses pulse-width modulation (PWM) to regulate display brightness, which causes the display to flicker at 200 Hz when at and below 20% brightness. This is a relatively low PWM frequency that will likely cause eye strain or headaches for those who are PWM sensitive.

257
cd/m²
270
cd/m²
273
cd/m²
279
cd/m²
304
cd/m²
272
cd/m²
259
cd/m²
253
cd/m²
233
cd/m²
Distribution of brightness
X-Rite i1Pro 2
Maximum: 304 cd/m² Average: 266.7 cd/m² Minimum: 26.5 cd/m²
Brightness Distribution: 77 %
Center on Battery: 307 cd/m²
Contrast: 1086:1 (Black: 0.28 cd/m²)
ΔE Color 7.28 | 0.4-29.43 Ø6.3, calibrated: 1.89
ΔE Greyscale 8.34 | 0.64-98 Ø6.5
92% sRGB (Argyll 3D) 60% AdobeRGB 1998 (Argyll 3D)
Gamma: 2.33
Trekstor Yourbook C11B
IPS, 1920x1080, 11.6
Trekstor Primebook C11
IPS, 1920x1080, 11.6
Lenovo Yoga 330-11IGM
TN LED, 1366x768, 11.6
Medion Akoya E2228T-MD61250
IPS, 1920x1080, 11.6
Asus VivoBook E12 E203NA-FD026T
TN LED, 1366x768, 11.6
Dell Chromebook 11 3181 2-in-1
IPS, 1366x768, 11.6
Asus VivoBook Flip 12 TP203NAH-BP049T
IPS, 1366x768, 11.6
Response Times
1%
12%
20%
34%
-8%
15%
Response Time Grey 50% / Grey 80% *
42 (21, 21)
41 (20, 21)
2%
50 (30, 20)
-19%
30 (15, 15)
29%
41 (22, 19)
2%
52.8 (39.2, 13.6)
-26%
39 (18, 21)
7%
Response Time Black / White *
32 (18, 14)
32 (18, 14)
-0%
14 (9, 5)
56%
22 (12, 10)
31%
11 (7, 4)
66%
28.8 (16.4, 12.4)
10%
25 (13, 12)
22%
PWM Frequency
200 (20)
200 (20)
0%
200 (90)
0%
200 (90)
0%
Screen
-7%
-44%
18%
-27%
9%
15%
Brightness middle
304
272
-11%
224
-26%
504
66%
253
-17%
213
-30%
253
-17%
Brightness
267
249
-7%
213
-20%
497
86%
234
-12%
218
-18%
245
-8%
Brightness Distribution
77
81
5%
80
4%
86
12%
87
13%
94
22%
65
-16%
Black Level *
0.28
0.44
-57%
0.52
-86%
0.52
-86%
0.33
-18%
0.21
25%
0.17
39%
Contrast
1086
618
-43%
431
-60%
969
-11%
767
-29%
1014
-7%
1488
37%
Colorchecker DeltaE2000 *
7.28
6.36
13%
11.64
-60%
4.48
38%
10.84
-49%
3.52
52%
3.17
56%
Colorchecker DeltaE2000 max. *
12.65
11.06
13%
20.8
-64%
9.38
26%
17.48
-38%
18.36
-45%
8.13
36%
Colorchecker DeltaE2000 calibrated *
1.89
Greyscale DeltaE2000 *
8.34
7.15
14%
13.4
-61%
1.63
80%
11.86
-42%
2.6
69%
2
76%
Gamma
2.33 94%
2.47 89%
2.57 86%
2.41 91%
2.72 81%
2.283 96%
2.43 91%
CCT
9038 72%
8664 75%
15186 43%
6715 97%
12882 50%
6861 95%
6850 95%
Color Space (Percent of AdobeRGB 1998)
60
60
0%
38
-37%
51
-15%
36
-40%
42
-30%
Color Space (Percent of sRGB)
92
93
1%
61
-34%
77
-16%
57
-38%
66
-28%
Total Average (Program / Settings)
-3% / -5%
-16% / -31%
19% / 18%
4% / -17%
1% / 5%
15% / 15%

* ... smaller is better

Screen Flickering / PWM (Pulse-Width Modulation)

To dim the screen, some notebooks will simply cycle the backlight on and off in rapid succession - a method called Pulse Width Modulation (PWM) . This cycling frequency should ideally be undetectable to the human eye. If said frequency is too low, users with sensitive eyes may experience strain or headaches or even notice the flickering altogether.
Screen flickering / PWM detected 200 Hz ≤ 20 % brightness setting

The display backlight flickers at 200 Hz (Likely utilizing PWM) Flickering detected at a brightness setting of 20 % and below. There should be no flickering or PWM above this brightness setting.

The frequency of 200 Hz is relatively low, so sensitive users will likely notice flickering and experience eyestrain at the stated brightness setting and below.

In comparison: 52 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 8629 (minimum: 43 - maximum: 142900) Hz was measured.

Our test device had a DeltaE 2000 ColorChecker deviation of 7.28 out of the box, which is noticeably higher than the ideal value of 3. The display also had a blue tint to it too. Calibrating the display worked wonders though and caused the ColorChecker deviation to drop to 1.89, while it also removed the blue tint and produced more balanced greyscale reproduction.

We have included our calibrated ICC profile in the box above our comparison table should you wish to use it with your device. However, please ensure that the display in your C11B carries the same model number as the one in our test device; ODMs and OEMs regularly use multiple displays from different manufacturers for the same laptop model. Otherwise, our ICC profile may worsen the colour accuracy of your device’s display. It is easy to switch back to original settings within Windows, but we would not want you to waste your time unnecessarily.

CalMAN: ColorChecker
CalMAN: ColorChecker
CalMAN: Greyscale
CalMAN: Greyscale
CalMAN: Colour Saturation
CalMAN: Colour Saturation
CalMAN: ColorChecker (calibrated)
CalMAN: ColorChecker (calibrated)
CalMAN: Greyscale (calibrated)
CalMAN: Greyscale (calibrated)
CalMAN: Colour Saturation (calibrated)
CalMAN: Colour Saturation (calibrated)

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
32 ms ... rise ↗ and fall ↘ combined↗ 18 ms rise
↘ 14 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. » 82 % 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
42 ms ... rise ↗ and fall ↘ combined↗ 21 ms rise
↘ 21 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. » 54 % of all devices are better.
This means that the measured response time is similar to the average of all tested devices (41 ms).

The C11B has strong viewing angles thanks to its IPS display, hence the screen is readable from practically any position. However, using the C11B outdoors is almost impossible. The display simply is not bright enough to read the screen outside even on a cloudy day.

Using the Yourbook C11B outside on an overcast day with the preinstalled screen protector still on.
Using the Yourbook C11B outside on an overcast day with the preinstalled screen protector still on.

Performance

The C11B is specifically aimed at students, while its processor is only powerful enough for simple office and Internet applications. Trekstor currently sells the C11B for around 350 Euros (~$400/£305). There are no other variants besides the pink version.

Processor

Trekstor has equipped the C11B with an Intel Celeron N3350 Apollo Lake dual-core processor. The 14 nm chip has a 6 W thermal design power (TDP), which is low enough to be passively cooled. The N3350 has a 1.1 GHz clock speed that can increase up to 2.3 GHz across both cores and 2.4 GHz during single-core tasks. The processor does not support Intel Hyper-Threading or Turbo Boost technologies. The CPU in our test device constantly averaged 2.2-2.3 GHz during testing on both battery and mains power.

We checked whether how well the C11B maintained its initial CPU performance by subjecting it to a loop of the Cinebench R15 multi-core benchmark that lasted around 30 minutes. As the below graph demonstrates, our test device performed consistently throughout the looped benchmark and did not thermal throttle. The data for the C11B is coloured red.

0102030405060708090100110120130140150160170180190200210220230240250260270280290Tooltip
Trekstor Yourbook C11B Intel Celeron N3350, Intel Celeron N3350: Ø85 (83.2-85.47)
Lenovo Yoga 330-11IGM Intel Pentium Silver N5000, Intel Pentium Silver N5000: Ø285 (283.57-285.54)
Medion Akoya E2228T-MD61250 Intel Atom x5-Z8350, Intel Atom x5-Z8350: Ø96.8 (96.31-97.11)
Asus VivoBook E12 E203NA-FD026T Intel Celeron N3350, Intel Celeron N3350: Ø82.2 (79.15-92.09)
Asus VivoBook Flip 12 TP203NAH-BP049T Intel Pentium N4200, Intel Pentium N4200: Ø113 (77.89-167)
Cinebench R10 Rendering Single 32Bit
1482
Cinebench R10 Rendering Multiple CPUs 32Bit
1775
Cinebench R10 Shading 32Bit
2904
Cinebench R15 CPU Single 64Bit
46 Points
Cinebench R15 CPU Multi 64Bit
85 Points
Cinebench R15 OpenGL 64Bit
15.04 fps
Cinebench R15 Ref. Match 64Bit
97.8 %
Help
Cinebench R15
CPU Single 64Bit
Average of class Convertible
  (19 - 177, n=268)
101 Points ∼47% +120%
Lenovo Yoga 330-11IGM
Intel Pentium Silver N5000
77 Points ∼36% +67%
Asus VivoBook E12 E203NA-FD026T
Intel Celeron N3350
48 Points ∼23% +4%
Trekstor Yourbook C11B
Intel Celeron N3350
46 Points ∼22%
Average Intel Celeron N3350
  (43 - 48, n=7)
45.7 Points ∼21% -1%
Trekstor Primebook C11
Intel Celeron N3350
43 Points ∼20% -7%
Medion Akoya E2228T-MD61250
Intel Atom x5-Z8350
28 Points ∼13% -39%
CPU Multi 64Bit
Lenovo Yoga 330-11IGM
Intel Pentium Silver N5000
284 Points ∼9% +234%
Average of class Convertible
  (33 - 761, n=274)
275 Points ∼9% +224%
Medion Akoya E2228T-MD61250
Intel Atom x5-Z8350
97 Points ∼3% +14%
Asus VivoBook E12 E203NA-FD026T
Intel Celeron N3350
92 Points ∼3% +8%
Average Intel Celeron N3350
  (81 - 92, n=7)
85.9 Points ∼3% +1%
Trekstor Yourbook C11B
Intel Celeron N3350
85 Points ∼3%
Trekstor Primebook C11
Intel Celeron N3350
81 Points ∼3% -5%
Cinebench R10
Rendering Single 32Bit
Average of class Convertible
  (466 - 7508, n=231)
3313 Points ∼31% +124%
Lenovo Yoga 330-11IGM
Intel Pentium Silver N5000
2305 Points ∼21% +56%
Average Intel Celeron N3350
  (1458 - 1917, n=5)
1570 Points ∼14% +6%
Trekstor Yourbook C11B
Intel Celeron N3350
1482 Points ∼14%
Asus VivoBook E12 E203NA-FD026T
Intel Celeron N3350
1458 Points ∼13% -2%
Medion Akoya E2228T-MD61250
Intel Atom x5-Z8350
817 Points ∼8% -45%
Rendering Multiple CPUs 32Bit
Lenovo Yoga 330-11IGM
Intel Pentium Silver N5000
8195 Points ∼16% +362%
Average of class Convertible
  (706 - 24180, n=227)
7603 Points ∼15% +328%
Medion Akoya E2228T-MD61250
Intel Atom x5-Z8350
2963 Points ∼6% +67%
Asus VivoBook E12 E203NA-FD026T
Intel Celeron N3350
2787 Points ∼6% +57%
Average Intel Celeron N3350
  (1775 - 2787, n=5)
2505 Points ∼5% +41%
Trekstor Yourbook C11B
Intel Celeron N3350
1775 Points ∼4%
Geekbench 3
32 Bit Multi-Core Score
Lenovo Yoga 330-11IGM
Intel Pentium Silver N5000
5546 Points ∼18% +120%
Average of class Convertible
  (954 - 14144, n=92)
5055 Points ∼16% +100%
Trekstor Yourbook C11B
Intel Celeron N3350
2526 Points ∼8%
Average Intel Celeron N3350
  (2409 - 2526, n=2)
2468 Points ∼8% -2%
Asus VivoBook E12 E203NA-FD026T
Intel Celeron N3350
2409 Points ∼8% -5%
Medion Akoya E2228T-MD61250
Intel Atom x5-Z8350
2159 Points ∼7% -15%
32 Bit Single-Core Score
Average of class Convertible
  (561 - 3933, n=92)
2111 Points ∼45% +61%
Lenovo Yoga 330-11IGM
Intel Pentium Silver N5000
1746 Points ∼37% +33%
Asus VivoBook E12 E203NA-FD026T
Intel Celeron N3350
1341 Points ∼29% +2%
Average Intel Celeron N3350
  (1314 - 1341, n=2)
1328 Points ∼28% +1%
Trekstor Yourbook C11B
Intel Celeron N3350
1314 Points ∼28%
Medion Akoya E2228T-MD61250
Intel Atom x5-Z8350
709 Points ∼15% -46%
Geekbench 4.0
64 Bit Multi-Core Score
Average of class Convertible
  (856 - 14519, n=32)
7176 Points ∼26% +177%
Lenovo Yoga 330-11IGM
Intel Pentium Silver N5000
5467 Points ∼20% +111%
Trekstor Yourbook C11B
Intel Celeron N3350
2589 Points ∼9%
Average Intel Celeron N3350
  (2529 - 2648, n=3)
2589 Points ∼9% 0%
Asus VivoBook E12 E203NA-FD026T
Intel Celeron N3350
2529 Points ∼9% -2%
Medion Akoya E2228T-MD61250
Intel Atom x5-Z8350
2177 Points ∼8% -16%
64 Bit Single-Core Score
Average of class Convertible
  (805 - 4858, n=32)
3017 Points ∼52% +106%
Lenovo Yoga 330-11IGM
Intel Pentium Silver N5000
2051 Points ∼36% +40%
Asus VivoBook E12 E203NA-FD026T
Intel Celeron N3350
1510 Points ∼26% +3%
Average Intel Celeron N3350
  (1464 - 1510, n=3)
1491 Points ∼26% +2%
Trekstor Yourbook C11B
Intel Celeron N3350
1464 Points ∼25%
Medion Akoya E2228T-MD61250
Intel Atom x5-Z8350
836 Points ∼14% -43%
Geekbench 4.1/4.2
64 Bit Multi-Core Score
Average of class Convertible
  (2296 - 15196, n=26)
8574 Points ∼24% +224%
Lenovo Yoga 330-11IGM
Intel Pentium Silver N5000
5705 Points ∼16% +116%
Trekstor Yourbook C11B
Intel Celeron N3350
2646 Points ∼7%
Average Intel Celeron N3350
  (2593 - 2646, n=2)
2620 Points ∼7% -1%
Asus VivoBook E12 E203NA-FD026T
Intel Celeron N3350
2593 Points ∼7% -2%
Medion Akoya E2228T-MD61250
Intel Atom x5-Z8350
2296 Points ∼6% -13%
64 Bit Single-Core Score
Average of class Convertible
  (880 - 4977, n=26)
3319 Points ∼52% +125%
Lenovo Yoga 330-11IGM
Intel Pentium Silver N5000
2021 Points ∼32% +37%
Asus VivoBook E12 E203NA-FD026T
Intel Celeron N3350
1529 Points ∼24% +4%
Average Intel Celeron N3350
  (1477 - 1529, n=2)
1503 Points ∼24% +2%
Trekstor Yourbook C11B
Intel Celeron N3350
1477 Points ∼23%
Medion Akoya E2228T-MD61250
Intel Atom x5-Z8350
880 Points ∼14% -40%
Mozilla Kraken 1.1 - Total Score
Dell Chromebook 11 3181 2-in-1
Intel Celeron N3060 (Version 69.0.3497.100)
4901.1 ms * ∼8% -16%
Trekstor Yourbook C11B
Intel Celeron N3350 (Edge 42)
4230 ms * ∼7%
Average Intel Celeron N3350
  (3108 - 4230, n=4)
3625 ms * ∼6% +14%
Average of class Convertible
  (809 - 9177, n=166)
2585 ms * ∼4% +39%
Octane V2 - Total Score
Average of class Convertible
  (3067 - 42822, n=157)
20935 Points ∼42% +138%
Average Intel Celeron N3350
  (8790 - 11290, n=4)
9766 Points ∼20% +11%
Trekstor Yourbook C11B
Intel Celeron N3350 (Edge 42)
8790 Points ∼18%
Dell Chromebook 11 3181 2-in-1
Intel Celeron N3060 (Version 69.0.3497.100)
7341 Points ∼15% -16%
JetStream 1.1 - 1.1 Total Score
Average of class Convertible
  (33.5 - 288, n=148)
167 Points ∼0% +149%
Lenovo Yoga 330-11IGM
Intel Pentium Silver N5000 (Edge 42)
109.85 Points ∼0% +64%
Asus VivoBook E12 E203NA-FD026T
Intel Celeron N3350 (Edge 41)
77.038 Points ∼0% +15%
Average Intel Celeron N3350
  (50.6 - 79.1, n=6)
69.7 Points ∼0% +4%
Trekstor Yourbook C11B
Intel Celeron N3350 (Edge 42)
67.125 Points ∼0%
Dell Chromebook 11 3181 2-in-1
Intel Celeron N3060 (Version 69.0.3497.100)
40.362 Points ∼0% -40%
Medion Akoya E2228T-MD61250
Intel Atom x5-Z8350 (Edge 41)
40.31 Points ∼0% -40%

* ... smaller is better

System Performance

Our test device performed smoothly and felt snappy throughout testing. We encountered no problems either, while the N3350 proved powerful enough for simple office and Internet applications. We would recommend refraining from opening more than two web-browser windows though as doing so tends to slow the system down considerably. PCMark scores on par for the average of N3350-powered devices that we have already tested.

PCMark 10
PCMark 10
PCMark 8 Home Score Accelerated v2
1700 points
PCMark 8 Creative Score Accelerated v2
1814 points
PCMark 8 Work Score Accelerated v2
2370 points
Help
PCMark 8 - Home Score Accelerated v2
Average of class Convertible
  (741 - 4741, n=244)
2736 Points ∼45% +61%
Lenovo Yoga 330-11IGM
UHD Graphics 605, N5000, 128 GB eMMC Flash
2321 Points ∼38% +37%
Asus VivoBook Flip 12 TP203NAH-BP049T
HD Graphics 505, N4200, Seagate Mobile HDD 1TB ST1000LM035
2094 Points ∼34% +23%
Asus VivoBook E12 E203NA-FD026T
HD Graphics 500, N3350, 32 GB eMMC Flash
1816 Points ∼30% +7%
Trekstor Yourbook C11B
HD Graphics 500, N3350, 64 GB eMMC Flash
1700 Points ∼28%
Average Intel Celeron N3350, Intel HD Graphics 500
  (1564 - 1816, n=7)
1700 Points ∼28% 0%
Trekstor Primebook C11
HD Graphics 500, N3350, SanDisk DF4064
1564 Points ∼26% -8%
Medion Akoya E2228T-MD61250
HD Graphics 400 (Braswell), Z8350, 64 GB eMMC Flash
1303 Points ∼21% -23%

Storage Devices

Trekstor has preinstalled a 64 GB eMMC drive, of which 41 GB is free to use out of the box. The remaining space is taken up by Windows 10 and the Recovery partition. The transfer rates are slower than many of our comparison devices but are above the average of those devices that we have tested that are equipped with 64 GB of eMMC.

Fortunately, it is comparatively easy to remove the M.2-2242 SSD should you wish to use a larger drive than the default one. Trekstor has incorporated a maintenance cover on the underside of the device for easy SSD replacement, which is secured by a single Phillips head screw. You could also expand the memory with a microSD card.

The M.2-2242 SSD...
The M.2-2242 SSD...
...is easy to replace thanks to the C11B’s maintenance flap.
...is easy to replace thanks to the C11B’s maintenance flap.
64 GB eMMC Flash
Sequential Read: 261.1 MB/s
Sequential Write: 117.6 MB/s
512K Read: 203.8 MB/s
512K Write: 59.03 MB/s
4K Read: 5.325 MB/s
4K Write: 9.04 MB/s
4K QD32 Read: 28.67 MB/s
4K QD32 Write: 12.9 MB/s
Trekstor Yourbook C11B
64 GB eMMC Flash
Trekstor Primebook C11
SanDisk DF4064
Lenovo Yoga 330-11IGM
128 GB eMMC Flash
Medion Akoya E2228T-MD61250
64 GB eMMC Flash
Asus VivoBook E12 E203NA-FD026T
32 GB eMMC Flash
Asus VivoBook Flip 12 TP203NAH-BP049T
Seagate Mobile HDD 1TB ST1000LM035
Average 64 GB eMMC Flash
 
Average of class Convertible
 
CrystalDiskMark 3.0
17%
32%
-15%
17%
-73%
-10%
382%
Write 4k QD32
12.9
14.19
10%
12.47
-3%
14.57
13%
24.63
91%
0.518
-96%
11.3 (1.775 - 37.3, n=29)
-12%
147 (0.033 - 573, n=322)
1040%
Read 4k QD32
28.67
32.66
14%
36.75
28%
14.76
-49%
29.66
3%
0.998
-97%
24.6 (7.36 - 47.8, n=29)
-14%
196 (0.317 - 632, n=322)
584%
Write 4k
9.04
8.721
-4%
12.58
39%
11.3
25%
10.17
13%
0.263
-97%
8.7 (1.504 - 24.3, n=29)
-4%
54.2 (0.013 - 182, n=322)
500%
Read 4k
5.325
9.175
72%
13.66
157%
10.74
102%
8.963
68%
0.378
-93%
11.4 (4.93 - 19.1, n=29)
114%
22.1 (0.215 - 62.3, n=322)
315%
Write 512
59.03
85.28
44%
76.25
29%
34.28
-42%
43.83
-26%
67.31
14%
44.8 (9.1 - 107, n=29)
-24%
241 (7.93 - 1885, n=320)
308%
Read 512
203.8
205.4
1%
239.6
18%
101.3
-50%
238.1
17%
22.62
-89%
118 (69.1 - 204, n=29)
-42%
321 (20.7 - 1788, n=320)
58%
Write Seq
117.6
111.2
-5%
91.92
-22%
41.38
-65%
78.35
-33%
66.38
-44%
55.9 (27.9 - 122, n=29)
-52%
306 (23 - 1889, n=322)
160%
Read Seq
261.1
265.4
2%
293.4
12%
119.3
-54%
276.6
6%
53.91
-79%
133 (74.8 - 261, n=29)
-49%
501 (33.6 - 2486, n=322)
92%

Graphics Card

The N3350 integrates an Intel HD Graphics 500 GPU, which handles graphics. The GPU supports DirectX 12 and can clock up to 650 MHz. 3DMark benchmark results are at an expected level for this GPU, while it can also decode H.264, HEVC, H.265, VP8 and VP9 videos, which helps to free up the CPU.

3DMark 11 Performance
620 points
3DMark Ice Storm Standard Score
25262 points
3DMark Cloud Gate Standard Score
2280 points
3DMark Fire Strike Score
401 points
Help
3DMark 11 - 1280x720 Performance GPU
Average of class Convertible
  (173 - 7483, n=297)
1170 Points ∼100% +107%
Lenovo Yoga 330-11IGM
Intel UHD Graphics 605, Intel Pentium Silver N5000
626 Points ∼54% +11%
Asus VivoBook Flip 12 TP203NAH-BP049T
Intel HD Graphics 505, Intel Pentium N4200
616 Points ∼53% +9%
Trekstor Yourbook C11B
Intel HD Graphics 500, Intel Celeron N3350
564 Points ∼48%
Trekstor Primebook C11
Intel HD Graphics 500, Intel Celeron N3350
534 Points ∼46% -5%
Asus VivoBook E12 E203NA-FD026T
Intel HD Graphics 500, Intel Celeron N3350
497 Points ∼42% -12%
Average Intel HD Graphics 500
  (368 - 584, n=10)
485 Points ∼41% -14%
Medion Akoya E2228T-MD61250
Intel HD Graphics 400 (Braswell), Intel Atom x5-Z8350
292 Points ∼25% -48%

Gaming Performance

The C11B is a budget device that can only play old games at low resolutions and graphics. We have included a comparison table below, which demonstrates the extent of the C11B’s gaming capabilities. Only StarCraft 2 ran at playable frame rates of the 17 games that we benchmarked on our test device. Overall, the C11B should handle simple or casual games that are downloadable from the Microsoft Store.

low med. high ultra
StarCraft 2 (2010) 54.514.1fps
Diablo III (2012) 2213.6fps
Counter-Strike: GO (2012) 16.614fps
BioShock Infinite (2013) 24.3119.72.7fps
Middle-earth: Shadow of Mordor (2014) 17.7fps
Dota 2 Reborn (2015) 22.115.3fps
Rainbow Six Siege (2015) 15.5fps
Overwatch (2016) 15.9fps
For Honor (2017) 8.7fps
Prey (2017) 4.9fps
Team Fortress 2 (2017) 18.217.2fps
Middle-earth: Shadow of War (2017) 10fps
Far Cry 5 (2018) 1fps
The Crew 2 (2018) 5.5fps
F1 2018 (2018) 12fps
Shadow of the Tomb Raider (2018) 3fps
Assassin´s Creed Odyssey (2018) 2fps

Emissions & Energy

Fan Noise

The C11B has a fanless design and no mechanical drive, which allowed it to work silently throughout testing.

Temperature

The Yourbook C11B during a stress test.
The Yourbook C11B during a stress test.

Our test device performed equally well in our one hour combined Prime95 and FurMark stress test on battery or on mains power. The CPU initially clocks up to 2.3 GHz across both cores but drops to 1.9 GHz after a few seconds. The clock speed then drops again to 1.7-1.8 GHz as the stress test progresses. Likewise, the GPU starts the stress test at around 600-650 MHz but drops to 300-350 MHz by the end of the hour. The CPU and GPU cannot maintain their peak clock speeds as they share the same 6 W TDP.

The C11B heats up too much for our liking under load. Our stress test causes surface temperatures to reach a maximum of 49 °C on one area of the top case, while a third of the device reaches or gets near to 40 °C. Your experience should vary though as our stress tests are extreme scenarios that will not occur in daily use. We conduct our stress tests to verify that our test devices are stable under sustained load. Conversely, surface temperatures do not exceed 30 °C when the C11B is idling.

Max. Load
 44.6 °C
112 F
30.6 °C
87 F
26.2 °C
79 F
 
 49 °C
120 F
33 °C
91 F
25.9 °C
79 F
 
 45.8 °C
114 F
30.4 °C
87 F
25.2 °C
77 F
 
Maximum: 49 °C = 120 F
Average: 34.5 °C = 94 F
27.3 °C
81 F
23.3 °C
74 F
41.4 °C
107 F
27.2 °C
81 F
32 °C
90 F
40.7 °C
105 F
27.3 °C
81 F
31.8 °C
89 F
39.4 °C
103 F
Maximum: 41.4 °C = 107 F
Average: 32.3 °C = 90 F
Power Supply (max.)  43 °C = 109 F | Room Temperature 21.4 °C = 71 F | FIRT 550-Pocket
(±) The average temperature for the upper side under maximal load is 34.5 °C / 94 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 49 °C / 120 F, compared to the average of 35.5 °C / 96 F, ranging from 21.8 to 55.7 °C for the class Convertible.
(±) The maximum temperature on the bottom side is 41.4 °C / 107 F, compared to the average of 36.6 °C / 98 F, ranging from 20.8 to 67.1 °C for the class Convertible.
(+) In idle usage, the average temperature for the upper side is 25.9 °C / 79 F, compared to the device average of 30.4 °C / 87 F.
(-) The palmrests and touchpad can get very hot to the touch with a maximum of 45.8 °C / 114.4 F.
(-) The average temperature of the palmrest area of similar devices was 29.2 °C / 84.6 F (-16.6 °C / -29.8 F).
A thermal image of the top case under sustained load
A thermal image of the top case under sustained load
A thermal image of the bottom case under sustained load
A thermal image of the bottom case under sustained load
A thermal image of the top case at idle
A thermal image of the top case at idle
A thermal image of the bottom case at idle
A thermal image of the bottom case at idle

Speakers

The C11B has stereo speakers that sit behind the grille above the keyboard. The speakers produce a rather thin sound that lacks bass as would be expected for a device at this price. We would recommend using headphones or external speakers for a better listening experience.

dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2033.131.633.12531.731.331.73131.931.131.94032.729.432.75030.331.830.36328.427.528.48027.126.527.110027.32527.312528.424.428.416029.123.629.120026.922.526.925024.222.124.231532.121.632.140043.620.243.650046.119.746.163053.218.953.28005218.252100059.717.859.7125061.217.761.2160065.117.465.1200063.617.963.6250064.517.964.5315062.717.962.7400062.418.262.450006318.163630066.618.566.6800068.518.568.5100006018.560125005518.3551600050.818.350.8SPL75.330.575.3N30.41.330.4median 55median 18.5median 55Delta121.91235.335.132.931.831.83236.535.132.428.93328.936.328.848.32761.52752.924.860.92462.822.763.32269.521.267.82174.82075.919.472.718.97117.770.117.86917.671.817.668.117.671.417.673.717.670.417.571.617.671.617.669.617.459.717.583.630.662.51.5median 69.6median 17.84.62.4hearing rangehide median Pink NoiseTrekstor Yourbook C11BApple MacBook 12 (Early 2016) 1.1 GHz
Frequency diagram (checkboxes can be checked and unchecked to compare devices)
Trekstor Yourbook C11B audio analysis

(-) | not very loud speakers (68.48 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 27% lower than median
(+) | bass is linear (6.8% delta to prev. frequency)
Mids 400 - 2000 Hz
(±) | higher mids - on average 6.8% higher than median
(±) | linearity of mids is average (12.6% delta to prev. frequency)
Highs 2 - 16 kHz
(±) | higher highs - on average 8.9% higher than median
(+) | highs are linear (6.9% delta to prev. frequency)
Overall 100 - 16.000 Hz
(-) | overall sound is not linear (33.7% difference to median)
Compared to same class
» 91% of all tested devices in this class were better, 3% similar, 6% worse
» The best had a delta of 11%, average was 22%, worst was 53%
Compared to all devices tested
» 95% of all tested devices were better, 2% similar, 4% worse
» The best had a delta of 3%, average was 21%, worst was 53%

Apple MacBook 12 (Early 2016) 1.1 GHz audio analysis

(+) | speakers can play relatively loud (83.6 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 11.3% lower than median
(±) | linearity of bass is average (14.2% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 2.4% away from median
(+) | mids are linear (5.5% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 2% away from median
(+) | highs are linear (4.5% delta to prev. frequency)
Overall 100 - 16.000 Hz
(+) | overall sound is linear (9.3% difference to median)
Compared to same class
» 2% of all tested devices in this class were better, 1% similar, 97% worse
» The best had a delta of 8%, average was 20%, worst was 50%
Compared to all devices tested
» 2% of all tested devices were better, 0% similar, 98% worse
» The best had a delta of 3%, average was 21%, worst was 53%

Power Consumption

The C11B is a relatively power-efficient device. Our test device consumes a maximum of 7 W at idle, while the system drew a maximum of 24.7 W during our stress test. Trekstor includes a 24 W power supply in the box, which should be powerful enough to charge the device even when you are pushing it hard.

Power Consumption
Off / Standbydarklight 0.5 / 0.39 Watt
Idledarkmidlight 3.2 / 6.1 / 7 Watt
Load midlight / 24.7 Watt
 color bar
Key: min: dark, med: mid, max: light        Metrahit Energy

Battery Life

The C11B has a 36.48 Wh battery, which lasted for 8 h 22 m in our Wi-Fi battery life test, during which we run a script that simulates the load required to render websites. We conducted this test by setting the Windows 10 Power mode to “Balanced”, disabling energy-saving features and setting the display to approximately 150 cd/m². The C11B has above-average battery life that is also better than most of our comparison devices.

Battery Runtime
NBC WiFi Websurfing Battery Test 1.3 (Edge 42)
8h 22min
Battery Runtime - WiFi Websurfing 1.3
Dell Chromebook 11 3181 2-in-1
N3060, HD Graphics 400 (Braswell), 42 Wh
772 min ∼29% +54%
Lenovo Yoga 330-11IGM
N5000, UHD Graphics 605, 36 Wh
565 min ∼21% +13%
Trekstor Yourbook C11B
N3350, HD Graphics 500, 36.48 Wh
502 min ∼19%
Asus VivoBook E12 E203NA-FD026T
N3350, HD Graphics 500, 38 Wh
493 min ∼19% -2%
Medion Akoya E2228T-MD61250
Z8350, HD Graphics 400 (Braswell), 37 Wh
472 min ∼18% -6%
Trekstor Primebook C11
N3350, HD Graphics 500, 36.48 Wh
454 min ∼17% -10%
Average of class Convertible
  (153 - 1010, n=214)
447 min ∼17% -11%
Asus VivoBook Flip 12 TP203NAH-BP049T
N4200, HD Graphics 505, 42 Wh
365 min ∼14% -27%

Pros

+ IPS touchscreen display
+ Full HD resolution
+ fanless design
+ good battery life
+ ac Wi-Fi
+ one-year MS Office 365 Personal and Sofatutor.com licences
+ spare M.2-2242 slot
+ USB Type-C

Cons

- slow processor
- small internal storage

Verdict

The Trekstor Yourbook C11B review. Test device courtesy of Trekstor Germany.
The Trekstor Yourbook C11B review. Test device courtesy of Trekstor Germany.

The Trekstor Yourbook C11B is an 11.6-inch convertible that is suited for students who primarily use MS Office and browse the Internet. The Celeron N3350 is not a powerful CPU but the system feels snappy if you do not push it too hard. The integrated GPU also frees up CPU resources by decoding videos, so the C11B can handle video-streaming services like Amazon Video or Netflix too.

The Trekstor Yourbook C11B is an affordable writing and surfing convertible that is suitable for light use. 

The C11B has just 64 GB of eMMC storage out of the box, but Trekstor makes it easy to swap out the M.2-2242 SSD should you need more storage. You could also add a microSD card for more storage if you are not feeling as adventurous.

The keyboard is good overall, but its lack of backlighting is disappointing. The C11B has decent battery life too, while its IPS touchscreen has a strong contrast ratio and viewing angles. We would have preferred a brighter display though for using the device outside. Positively, Trekstor has included a USB Type-C port for data, power or video.

The C11B also scores well for its included software licenses. Trekstor has included a one-year subscription to MS Office 365 Personal and Sofatutor.com, the latter of which usually costs as much as the C11B for a year’s license. Trekstor also sells the Primebook C11 for around 300 Euros ($343/£261) should you not need the software that is included with the C11B. In short, the Yourbook C11B is a solid budget convertible for students that comes with useful software.

Trekstor Yourbook C11B - 11/05/2018 v6
Sascha Mölck

Chassis
89 / 98 → 91%
Keyboard
74%
Pointing Device
81%
Connectivity
51 / 80 → 63%
Weight
73 / 35-78 → 89%
Battery
91%
Display
79%
Games Performance
45 / 68 → 66%
Application Performance
49 / 87 → 56%
Temperature
88%
Noise
100%
Audio
44 / 91 → 48%
Camera
40 / 85 → 47%
Average
70%
81%
Convertible - Weighted Average

Pricecompare

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> Notebook / Laptop Reviews and News > Reviews > Trekstor Yourbook C11B (N3350, eMMC, FHD) Convertible Review
Sascha Mölck, 2018-11- 6 (Update: 2018-11- 9)