Notebookcheck

Trekstor Primetab T13B (N4200, HD505) Convertible Review

Mike Wobker, 👁 Sebastian Jentsch, Felicitas Krohn (translated by Ariana Brodsky), 08/22/2018

The Surftab becomes the Primetab. The Primetab T13B, a 2-in-1 tablet with an attachable keyboard cover, is Trekstor's latest contribution to the tablet market. At less than 400 Euros (~$460), the price is already a strong argument in favor of the Windows tablet. Curious what else the Trekstor device has to offer? Our review tells all.

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Trekstor Primetab T13B

In our experience to date, the budget devices Trekstor products have always offered solid manufacturing quality and enough system performance for simple tasks. Buyers could often choose between different display sizes, as was the case for the Primebook C11 and Primebook C13

Our current test model offers a 13.3-inch display and comes equipped with an Intel Pentium N4200 CPU. An integrated Intel HD Graphics 505 graphics unit takes care of graphics-related tasks. The hardware package is rounded off by 4 GB of RAM and 64 GB of internal memory.

But Trekstor is not the only manufacturer making convertibles in the sub-500 Euro (~$575) price bracket. We have selected a smattering of these devices for comparison, including the Lenovo Yoga 330-11IGM, the Asus VivoBook Flip 15 TP501UQ and the Acer Switch 3 SW312. The Asus VivoBook Flip 15 used to be somewhat more expensive, but at this point it is also available for under 500 Euros. We will also compare the new device to Trekstor's own Primebook C13.

Trekstor Primetab T13B (Primetab Series)
Graphics adapter
Memory
4096 MB 
Display
13.3 inch 16:9, 1920 x 1080 pixel 166 PPI, capacitive, native pen support, LC133LF4L01, IPS, glossy: yes, detachable screen
Mainboard
Apollo Lake
Storage
SanDisk SEM64G, 64 GB 
, 45 GB free
Soundcard
RealTek ALC269 @ Intel Apollo Lake SoC - High Definition Audio Controller
Connections
3 USB 3.0 / 3.1 Gen1, 1 HDMI, Audio Connections: audio combo, Card Reader: microSD, 1 Fingerprint Reader, Brightness Sensor, Sensors: g-sensor, Hall sensor
Networking
Intel Dual Band Wireless-AC 3165 (a/b/g/n/ac), Bluetooth 4.2
Size
height x width x depth (in mm): 17.4 x 335 x 220 ( = 0.69 x 13.19 x 8.66 in)
Battery
37 Wh, 5000 mAh Lithium-Polymer
Operating System
Microsoft Windows 10 Home 64 Bit
Camera
Webcam: 0.9 MP, 16:9 / 1.8 MP, 4:3
Additional features
Speakers: stereo, Keyboard: chiclet, Keyboard Light: yes, keyboard dock, cleaning cloth, Office 365 Personal (1 year license), 24 Months Warranty, fanless
Weight
1.465 kg ( = 51.68 oz / 3.23 pounds), Power Supply: 113 g ( = 3.99 oz / 0.25 pounds)
Price
400 Euro
Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

 

Case & Connectivity - Trekstor tablet with ac WLAN

Metal was Trekstor's material of choice for the Primetab T13B's case. Unfortunately, the manufacturing process has left some gaps a little unevenly spaced. But these irregularities are only noticeable upon close inspection, and they have no bearing on the overall feel of stability. The convertible's comparatively heavy weight of 1.5 kg (~3.3 lb) contributes to this feel. Due to the device's weight, the Primetab can only be held comfortably in one hand for a short time - but thanks to the integrated kickstand, it is easy to stand the tablet on a flat surface. Under the kickstand, users will find a maintenance hatch that provides access to an empty M.2 2242 SSD slot.

External devices can be connected over a USB Type A port and a USB Type C port, both according to the USB 3.1 Gen. 1 standard. For communication over shorter distances, Trekstor has equipped the convertible with Bluetooth 4.2 and the fast ac standard WLAN. With the latter, the budget tablet reaches fast transfer rates of over 300 MBit/s, putting it on par with other devices in its price bracket.

In addition to the storage expansion option offered by the M.2 SSD slot, the convertible also has space for a microSD card. The corresponding slot is located on the top edge of the Trekstor tablet, and according to the manufacturer, the reader accepts cards up to 256 GB in size.

Trekstor Primetab T13B
Trekstor Primetab T13B
Trekstor Primetab T13B
Trekstor Primetab T13B
Trekstor Primetab T13B
Trekstor Primetab T13B
Trekstor Primetab T13B
Trekstor Primetab T13B
Trekstor Primetab T13B

Size Comparison

Connectivity

left side: headphone jack, 1x USB 3.1 Type-A
left side: headphone jack, 1x USB 3.1 Type-A
right side: 1x USB 3.1 Type-C, 1x USB 3.1 Type-A, 1x micro HDMI, power connection
right side: 1x USB 3.1 Type-C, 1x USB 3.1 Type-A, 1x micro HDMI, power connection
SDCardreader Transfer Speed
average JPG Copy Test (av. of 3 runs) (sort by value)
Lenovo Yoga 330-11IGM
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
59.5 MB/s ∼100%
Asus VivoBook Flip TP501UQ-FZ119T
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
24.7 MB/s ∼42%
Trekstor Primebook C13
  (Toshiba Exceria Pro M501 microSDXC 64GB)
22.7 MB/s ∼38%
Average of class Convertible
  (7.5 - 197, n=106)
58.7 MB/s ∼99%
maximum AS SSD Seq Read Test (1GB) (sort by value)
Trekstor Primetab T13B
 
36.1 MB/s ∼49%
Lenovo Yoga 330-11IGM
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
67.5 MB/s ∼91% +87%
Asus VivoBook Flip TP501UQ-FZ119T
  (Toshiba Exceria Pro SDXC 64 GB UHS-II)
27.3 MB/s ∼37% -24%
Trekstor Primebook C13
  (Toshiba Exceria Pro M501 microSDXC 64GB)
35.2 MB/s ∼47% -2%
Average of class Convertible
  (24 - 246, n=105)
74.4 MB/s ∼100% +106%
Networking
iperf3 Client (receive) TCP 1 m 4M x10
Acer Switch 3 SW312-31-P5VG
Intel Dual Band Wireless-AC 7265
560 MBit/s ∼100% +79%
Asus VivoBook Flip TP501UQ-FZ119T
Intel Dual Band Wireless-AC 8260
475 MBit/s ∼85% +52%
Trekstor Primebook C13
Intel Dual Band Wireless-AC 3165
314 MBit/s ∼56% +1%
Trekstor Primetab T13B
Intel Dual Band Wireless-AC 3165
312 MBit/s ∼56%
Lenovo Yoga 330-11IGM
Intel Dual Band Wireless-AC 3165
300 MBit/s ∼54% -4%
iperf3 Client (transmit) TCP 1 m 4M x10
Asus VivoBook Flip TP501UQ-FZ119T
Intel Dual Band Wireless-AC 8260
676 MBit/s ∼100% +102%
Acer Switch 3 SW312-31-P5VG
Intel Dual Band Wireless-AC 7265
573 MBit/s ∼85% +72%
Trekstor Primebook C13
Intel Dual Band Wireless-AC 3165
345 MBit/s ∼51% +3%
Trekstor Primetab T13B
Intel Dual Band Wireless-AC 3165
334 MBit/s ∼49%
Lenovo Yoga 330-11IGM
Intel Dual Band Wireless-AC 3165
310 MBit/s ∼46% -7%

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Input Devices - Keyboard dock for the Primetab T13B

The Primetab T13B's touchscreen recognizes input with precision. Every time the user touches the screen, the input is quickly translated into action. It is also possible to execute multi-touch gestures with up to 10 touchpoints. Typing, on the other hand, goes easier with the keyboard cover. The cover, comprising a small touchpad and a QWERTY keyboard, is securely fastened to the tablet with a magnetic strip. The keys are quite closely spaced, and their feedback is very soft. The keyboard also bends in the middle, even when the pressure applied is fairly minimal. As a result, in our opinion, the Trekstor convertible is not suited for users who do a lot of typing.

Trekstor Primetab T13B input devices
Trekstor Primetab T13B input devices

Display - Preventable blue cast on the Trekstor Primetab T13B

subpixels
subpixels

The Trekstor Primetab T13B's display consists of a 13.3-inch IPS panel with a touch surface and a resolution of 1920x1080 pixels in 16:9 format. At an average of 333 cd/m², the brightness is slightly higher than that of comparable devices, but the highly reflective display surface is still prohibitive in outdoor use. The brightness distribution is 87% similar across the screen - again somewhat better than the competition, though it could be more uniform.

351
cd/m²
359
cd/m²
347
cd/m²
327
cd/m²
324
cd/m²
319
cd/m²
322
cd/m²
314
cd/m²
333
cd/m²
Distribution of brightness
X-Rite i1Pro 2
Maximum: 359 cd/m² Average: 332.9 cd/m² Minimum: 30.9 cd/m²
Brightness Distribution: 87 %
Center on Battery: 324 cd/m²
Contrast: 831:1 (Black: 0.39 cd/m²)
ΔE Color 8.42 | 0.4-29.43 Ø6.2, calibrated: 1.85
ΔE Greyscale 9.18 | 0.64-98 Ø6.5
95% sRGB (Argyll 3D) 62% AdobeRGB 1998 (Argyll 3D)
Gamma: 2.34
Trekstor Primetab T13B
LC133LF4L01, , 1920x1080, 13.3
Lenovo Yoga 330-11IGM
BOE CQ NT116WHM-N42, , 1366x768, 11.6
Asus VivoBook Flip TP501UQ-FZ119T
BOE HF NV156FHM-N43, , 1920x1080, 15.6
Acer Switch 3 SW312-31-P5VG
XR122EA2T, , 1920x1200, 12.2
Trekstor Primebook C13
PBTB133F006-A, , 1920x1080, 13.3
Response Times
10%
-21%
9%
-3%
Response Time Grey 50% / Grey 80% *
38 (19, 19)
50 (30, 20)
-32%
45 (23, 22)
-18%
37 (18, 19)
3%
39 (19, 20)
-3%
Response Time Black / White *
29 (19, 10)
14 (9, 5)
52%
36 (21, 15)
-24%
25 (14, 12)
14%
30 (17, 13)
-3%
PWM Frequency
200 (90)
19840 (90)
20000 (90)
990 (20)
Screen
-35%
20%
17%
3%
Brightness middle
324
224
-31%
314
-3%
364
12%
201
-38%
Brightness
333
213
-36%
287
-14%
341
2%
207
-38%
Brightness Distribution
87
80
-8%
85
-2%
85
-2%
88
1%
Black Level *
0.39
0.52
-33%
0.25
36%
0.47
-21%
0.22
44%
Contrast
831
431
-48%
1256
51%
774
-7%
914
10%
Colorchecker DeltaE2000 *
8.42
11.64
-38%
4.55
46%
3.4
60%
6.6
22%
Colorchecker DeltaE2000 max. *
15.11
20.8
-38%
7.39
51%
7.61
50%
12.39
18%
Colorchecker DeltaE2000 calibrated *
1.85
Greyscale DeltaE2000 *
9.18
13.4
-46%
4.95
46%
1.7
81%
7.73
16%
Gamma
2.34 94%
2.57 86%
2.37 93%
2.36 93%
2.46 89%
CCT
8841 74%
15186 43%
5803 112%
6750 96%
7864 83%
Color Space (Percent of AdobeRGB 1998)
62
38
-39%
58
-6%
59
-5%
61
-2%
Color Space (Percent of sRGB)
95
61
-36%
89
-6%
91
-4%
93
-2%
Total Average (Program / Settings)
-13% / -28%
-1% / 13%
13% / 15%
0% / 2%

* ... smaller is better

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↗ 19 ms rise
↘ 10 ms fall
The screen shows relatively slow response rates in our tests and may be too slow for gamers.
In comparison, all tested devices range from 0.8 (minimum) to 240 (maximum) ms. » 68 % 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
38 ms ... rise ↗ and fall ↘ combined↗ 19 ms rise
↘ 19 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.9 (minimum) to 636 (maximum) ms. » 35 % of all devices are better.
This means that the measured response time is similar to 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: 53 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 8933 (minimum: 43 - maximum: 142900) Hz was measured.

color space coverage sRGB - 95 percent
color space coverage sRGB - 95 percent
color space coverage AdobeRGB - 62 percent
color space coverage AdobeRGB - 62 percent

Our measurements certify that the Primetab T13B offers very good color reproduction in the sRGB color space, covering a good 95%. The tablet covers 62% of the Adobe RGB color space. Because the black value is a little high (0.39 cd/m²), dark colors appear to have a faint gray cast. The display also has a noticeable blue cast, although this can be rectified almost entirely with a calibration. The built-in panel is actually very good, presenting a post-calibration DeltaE value of just 0.8.

The IPS panel in the Trekstor tablet has stable viewing angles. From almost any angle, the screen content looks accurate and easily recognizable. As long as there are no reflections from the surrounding environment obscuring the display, the user always has a clear view of the convertible's screen content, even from less than ideal vantage points. Outdoors, the screen is highly reflective. The display brightness is not sufficient to overcome reflections from objects in the surrounding environment. Users will need to seek out shady spots, or just stay indoors.

CalMAN - color accuracy
CalMAN - color accuracy
CalMAN - saturation
CalMAN - saturation
CalMAN - grayscale
CalMAN - grayscale
CalMAN - color accuracy (calibrated)
CalMAN - color accuracy (calibrated)
CalMAN - saturation (calibrated)
CalMAN - saturation (calibrated)
CalMAN - grayscale (calibrated)
CalMAN - grayscale (calibrated)
outdoor use
outdoor use
viewing angle stability
viewing angle stability

Performance - Trekstor convertible for simple tasks

LatencyMon
LatencyMon

Trekstor has chosen to equip the Primetab T13B with an Intel Pentium N4200 CPU, an Intel HD Graphics 505, 4 GB of RAM and 64 GB of storage. This hardware configuration makes the convertible well-suited for simple tasks and web surfing. Casual games from the Windows Store should also run smoothly. In addition, the internal storage can be expanded via the M.2 SSD slot.

Processor

The Intel Pentium N4200 at work in the Primetab T13B is an inexpensive processor with four cores. Due to its low power draw, the CPU is suitable for use in passively cooled systems. The processor reaches clock rates of up to 2.5 GHz, although this speed cannot be maintained for very long in systems without active cooling. The CPU's speed is appropriate for simple office and internet-related tasks, as well as simple multi-tasking.

0102030405060708090100110120130Tooltip
Cinebench R15 CPU Multi 64 Bit

In the Cinebench R15 benchmark, the Trekstor T13B's results fall within the expected range, although some comparable devices do somewhat better here. Our test device takes second-to-last place on our comparison list. In the endurance test, the processor maintained its performance over an extended period under load. The performance only throttled a little near the end of the test sequence.

Cinebench R15
CPU Single 64Bit
Asus VivoBook Flip TP501UQ-FZ119T
Intel Core i5-7200U
128 Points ∼59% +151%
Average of class Convertible
  (19 - 177, n=273)
102 Points ∼47% +100%
Lenovo Yoga 330-11IGM
Intel Pentium Silver N5000
77 Points ∼35% +51%
Average Intel Pentium N4200
  (47 - 53, n=14)
51.6 Points ∼24% +1%
Acer Switch 3 SW312-31-P5VG
Intel Pentium N4200
51 Points ∼23% 0%
Trekstor Primetab T13B
Intel Pentium N4200
51 Points ∼23%
Trekstor Primebook C13
Intel Celeron N3350
45 Points ∼21% -12%
CPU Multi 64Bit
Asus VivoBook Flip TP501UQ-FZ119T
Intel Core i5-7200U
331 Points ∼8% +157%
Lenovo Yoga 330-11IGM
Intel Pentium Silver N5000
284 Points ∼6% +120%
Average of class Convertible
  (33 - 761, n=279)
279 Points ∼6% +116%
Acer Switch 3 SW312-31-P5VG
Intel Pentium N4200
159 Points ∼4% +23%
Average Intel Pentium N4200
  (128 - 175, n=14)
156 Points ∼4% +21%
Trekstor Primetab T13B
Intel Pentium N4200
129 Points ∼3%
Trekstor Primebook C13
Intel Celeron N3350
88 Points ∼2% -32%
Cinebench R15 CPU Single 64Bit
51 Points
Cinebench R15 CPU Multi 64Bit
129 Points
Cinebench R15 OpenGL 64Bit
11.68 fps
Cinebench R15 Ref. Match 64Bit
97.8 %
Help

System Performance

The results in the PCMark benchmark place the Primetab T13B significantly behind its competitors. The Trekstor device did not meet our expectations in the PCMark 8 Home tests, and the overall score in PCMark 10 was also disappointing. But in everyday use, the Trekstor 2-in-1 convertible runs smoothly and does not confront the user with long load times.

To find out how other devices with Intel Pentium N4200s perform, see our CPU benchmark page.

PCMark 8 - Home Score Accelerated v2
Asus VivoBook Flip TP501UQ-FZ119T
GeForce 940MX, 7200U, Micron SSD 1100 (MTFDDAV256TBN)
3703 Points ∼61% +149%
Average of class Convertible
  (741 - 4741, n=249)
2748 Points ∼45% +85%
Lenovo Yoga 330-11IGM
UHD Graphics 605, N5000, 128 GB eMMC Flash
2321 Points ∼38% +56%
Acer Switch 3 SW312-31-P5VG
HD Graphics 505, N4200, Hynix HCG4a2 64 GB
2066 Points ∼34% +39%
Average Intel Pentium N4200, Intel HD Graphics 505
  (1337 - 2314, n=13)
1955 Points ∼32% +32%
Trekstor Primebook C13
HD Graphics 500, N3350, SanDisk DF4064
1629 Points ∼27% +10%
Trekstor Primetab T13B
HD Graphics 505, N4200, SanDisk SEM64G
1485 Points ∼24%
PCMark 10 - Score
Average of class Convertible
  (1006 - 4347, n=73)
3081 Points ∼40% +140%
Asus VivoBook Flip TP501UQ-FZ119T
GeForce 940MX, 7200U, Micron SSD 1100 (MTFDDAV256TBN)
2850 Points ∼37% +122%
Lenovo Yoga 330-11IGM
UHD Graphics 605, N5000, 128 GB eMMC Flash
1934 Points ∼25% +51%
Average Intel Pentium N4200, Intel HD Graphics 505
  (1283 - 1577, n=5)
1410 Points ∼18% +10%
Trekstor Primetab T13B
HD Graphics 505, N4200, SanDisk SEM64G
1283 Points ∼17%
PCMark 8 Home Score Accelerated v2
1485 points
Help

Storage Solution

The Primetab T13B is equipped with 64 GB of flash storage, manufactured by SanDisk. This medium does not offer the quick write and read rates typical of modern SSDs, but it is still substantially faster than conventional hard drives. The Trekstor device's results in the storage benchmarks are quite weak compared to the competition, but they are still within a good range.

To read more about how other mass storage media compare to our test device's SanDisk SEM64G, see our HDD/SSD benchmark page.

Trekstor Primetab T13B
SanDisk SEM64G
Lenovo Yoga 330-11IGM
128 GB eMMC Flash
Asus VivoBook Flip TP501UQ-FZ119T
Micron SSD 1100 (MTFDDAV256TBN)
Acer Switch 3 SW312-31-P5VG
Hynix HCG4a2 64 GB
Trekstor Primebook C13
SanDisk DF4064
Average SanDisk SEM64G
 
Average of class Convertible
 
CrystalDiskMark 3.0
203%
1574%
365%
172%
18%
1211%
Write 4k QD32
3.808
12.47
227%
199.2
5131%
33.54
781%
13.83
263%
4.32 (3.81 - 4.74, n=3)
13%
147 (0.033 - 573, n=323)
3760%
Read 4k QD32
11
36.75
234%
161.5
1368%
30.39
176%
32.26
193%
11.7 (11 - 12.2, n=3)
6%
196 (0.317 - 632, n=323)
1682%
Write 4k
2.929
12.58
329%
89.8
2966%
26.31
798%
9.903
238%
3.66 (2.93 - 4.15, n=3)
25%
54.2 (0.013 - 182, n=323)
1750%
Read 4k
4.327
13.66
216%
24.11
457%
11.43
164%
5.212
20%
7.84 (4.33 - 9.67, n=3)
81%
22.1 (0.215 - 62.3, n=323)
411%
Write 512
23.89
76.25
219%
329.8
1280%
140
486%
85.93
260%
24.8 (23.9 - 25.8, n=3)
4%
241 (7.93 - 1885, n=321)
909%
Read 512
99.22
239.6
141%
335.6
238%
231.6
133%
207.2
109%
109 (99.2 - 116, n=3)
10%
321 (20.7 - 1788, n=321)
224%
Write Seq
41.03
91.92
124%
398.7
872%
149.3
264%
113.8
177%
42.1 (41 - 42.8, n=3)
3%
306 (23 - 1889, n=323)
646%
Read Seq
123.6
293.4
137%
465.6
277%
272.2
120%
265.4
115%
124 (123 - 125, n=3)
0%
501 (33.6 - 2486, n=323)
305%
SanDisk SEM64G
Sequential Read: 123.6 MB/s
Sequential Write: 41.03 MB/s
512K Read: 99.22 MB/s
512K Write: 23.89 MB/s
4K Read: 4.327 MB/s
4K Write: 2.929 MB/s
4K QD32 Read: 11 MB/s
4K QD32 Write: 3.808 MB/s

Graphics Card

In Trekstor's Primetab T13B, an integrated Intel HD Graphics 505 graphics unit takes care of graphics-related tasks. The expected level of performance for this GPU is very low and only sufficient for tasks that do not require much in the way of 3D performance. In our benchmark results, the GPU's performance scores come in significantly behind those of comparable devices.

To find out how other devices with Intel HD Graphics 505 graphics units perform, see our GPU benchmark page.

3DMark 11 - 1280x720 Performance GPU
Asus VivoBook Flip TP501UQ-FZ119T
NVIDIA GeForce 940MX, Intel Core i5-7200U
2339 Points ∼100% +344%
Average of class Convertible
  (173 - 7483, n=300)
1179 Points ∼50% +124%
Acer Switch 3 SW312-31-P5VG
Intel HD Graphics 505, Intel Pentium N4200
726 Points ∼31% +38%
Lenovo Yoga 330-11IGM
Intel UHD Graphics 605, Intel Pentium Silver N5000
626 Points ∼27% +19%
Average Intel HD Graphics 505
  (424 - 825, n=14)
620 Points ∼27% +18%
Trekstor Primebook C13
Intel HD Graphics 500, Intel Celeron N3350
543 Points ∼23% +3%
Trekstor Primetab T13B
Intel HD Graphics 505, Intel Pentium N4200
527 Points ∼23%
3DMark 11 Performance
572 points
Help

Gaming Performance

Intel's HD Graphics 505 only offers enough performance power for casual games and very old games. The five-year-old “Bioshock Infinite” game only runs smoothly at the lowest quality setting.

For more information about how various games run on an Intel HD Graphics 505, see our GPU game list.

low med. high ultra
BioShock Infinite (2013) 21.228.33fps

Emissions & Energy - Primetab T13B with mediocre battery life

Because the Primetab T13B is passively cooled, it has no fan to generate noise. We did not observe any chirping or buzzing noises stemming from the Trekstor convertible.

Temperature

stress test
stress test

We measured surface temperatures of a maximum of 36°C (~96.8°F) in idle mode, and up to 42°C (~107.6°F) under load. At these temperatures, the device feels warm, but is still comfortable to hold. During our stress test, the CPU warmed to over 65°C (149°F) and briefly throttled to 800 MHz. Because the CPU had leveled off at just above its base clock rate (1.1 GHz) by the end of the hour-long test, we would not say that the clock rate drops below its base number for a sustained period.

In everyday use, users should not encounter performance limitations as a result of excessive core temperatures.

Max. Load
 28 °C
82 F
32.2 °C
90 F
42 °C
108 F
 
 29.1 °C
84 F
31.8 °C
89 F
37.9 °C
100 F
 
 37.6 °C
100 F
38.9 °C
102 F
38.4 °C
101 F
 
Maximum: 42 °C = 108 F
Average: 35.1 °C = 95 F
41.8 °C
107 F
36.1 °C
97 F
30.1 °C
86 F
39.6 °C
103 F
36 °C
97 F
29.8 °C
86 F
34.2 °C
94 F
33.7 °C
93 F
30.9 °C
88 F
Maximum: 41.8 °C = 107 F
Average: 34.7 °C = 94 F
Power Supply (max.)  44.4 °C = 112 F | Room Temperature 21.9 °C = 71 F | FIRT 550-Pocket
(±) The average temperature for the upper side under maximal load is 35.1 °C / 95 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 42 °C / 108 F, compared to the average of 35.5 °C / 96 F, ranging from 21.8 to 55.7 °C for the class Convertible.
(±) The bottom heats up to a maximum of 41.8 °C / 107 F, compared to the average of 36.6 °C / 98 F
(+) In idle usage, the average temperature for the upper side is 30 °C / 86 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 38.9 °C / 102 F.
(-) The average temperature of the palmrest area of similar devices was 29.2 °C / 84.6 F (-9.7 °C / -17.4 F).
heat development in idle - top
heat development in idle - top
heat development in idle - bottom
heat development in idle - bottom
heat development under load - top
heat development under load - top
heat development under load - bottom
heat development under load - bottom

Speakers

The Primetab T13B's speakers are very quiet and have an unbalanced sound. Audio playback sounds weak, and the volume is insufficient to rise above background noise. To enjoy media content over an extended period, headphones or external speakers are much to be preferred. These external audio devices can be connected to the Trekstor tablet via Bluetooth 4.2 or the 3.5mm jack.

dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2031.631.731.62530.929.530.9313630.2364031.429.331.45033.429.833.46329.827.729.88027.526.127.510027.725.927.712527.324.627.316026.123.826.120026.32226.325023.220.923.231527.521.327.540041.522.141.55004518.94563046.218.346.280053.218.253.2100058.21858.2125057.917.457.9160055.117.455.1200052.117.452.1250050.717.450.7315050.717.550.7400048.617.948.65000521852630057.818.457.8800063.518.763.51000058.718.958.71250046.51946.51600043.219.443.2SPL67.830.467.8N18.71.318.7median 48.6median 18.7median 48.6Delta10.1210.135.335.132.931.831.83236.535.132.428.93328.936.328.848.32761.52752.924.860.92462.822.763.32269.521.267.82174.82075.919.472.718.97117.770.117.86917.671.817.668.117.671.417.673.717.670.417.571.617.671.617.669.617.459.717.583.630.662.51.5median 69.6median 17.84.62.4hearing rangehide median Pink NoiseTrekstor Primetab T13BApple MacBook 12 (Early 2016) 1.1 GHz
Frequency diagram (checkboxes can be checked and unchecked to compare devices)
Trekstor Primetab T13B audio analysis

(-) | not very loud speakers (63.54 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 22.3% lower than median
(+) | bass is linear (5.2% delta to prev. frequency)
Mids 400 - 2000 Hz
(±) | higher mids - on average 5.8% higher than median
(-) | mids are not linear (15.4% delta to prev. frequency)
Highs 2 - 16 kHz
(±) | higher highs - on average 6% higher than median
(±) | linearity of highs is average (11.1% delta to prev. frequency)
Overall 100 - 16.000 Hz
(-) | overall sound is not linear (33.4% difference to median)
Compared to same class
» 90% 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
» 94% 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, 2% similar, 96% worse
» The best had a delta of 8%, average was 19%, worst was 50%
Compared to all devices tested
» 2% of all tested devices were better, 1% similar, 98% worse
» The best had a delta of 3%, average was 21%, worst was 53%

Energy Consumption

In our tests, the Trekstor Primetab T13B consumed a minimal amount of power in idle mode (3.9 watts). At a maximum of 15.6 watts under load, the convertible is never a power guzzler. The 24-watt power supply that comes with the Primetab offers enough power to charge and use the device simultaneously.

Power Consumption
Off / Standbydarklight 0.2 / 0.75 Watt
Idledarkmidlight 3.9 / 9.3 / 10.9 Watt
Load midlight 12.6 / 15.6 Watt
 color bar
Key: min: dark, med: mid, max: light        Metrahit Energy

Battery Life

With a run time of just over four hours, the Trekstor Primetab T13B has the shortest battery life of all the convertibles on our comparison list. Other manufacturers manage to squeeze a lot more out of similar hardware configurations with the same battery capacity. The charging device that comes with the convertible needs around 5 hours to fully charge the battery.

Battery Runtime - WiFi Websurfing 1.3
Lenovo Yoga 330-11IGM
N5000, UHD Graphics 605, 36 Wh
565 min ∼21% +132%
Average of class Convertible
  (153 - 1010, n=219)
448 min ∼17% +84%
Asus VivoBook Flip TP501UQ-FZ119T
7200U, GeForce 940MX, 38 Wh
372 min ∼14% +52%
Acer Switch 3 SW312-31-P5VG
N4200, HD Graphics 505, 36 Wh
309 min ∼12% +27%
Trekstor Primebook C13
N3350, HD Graphics 500, 40.7 Wh
257 min ∼10% +5%
Trekstor Primetab T13B
N4200, HD Graphics 505, 37 Wh
244 min ∼9%
Battery Runtime
NBC WiFi Websurfing Battery Test 1.3
4h 04min

Pros

+ stable case
+ storage can be expanded via M.2 SSD
+ USB Type-C
+ display very good after calibration

Cons

- short battery life
- long charge time
- display has noticeable blue cast in factory default
- heavy

Verdict - Trekstor 2-in-1 convertible for office and internet-related tasks

In Review: Trekstor Primetab T13B. Test device courtesy of notebooksbilliger.de.
In Review: Trekstor Primetab T13B. Test device courtesy of notebooksbilliger.de.

In our tests, the Primetab T13B revealed itself to be a convertible best-suited for users who do not need much performance power or storage space. The latter can be expanded, however, and despite the slow CPU, the Trekstor tablet's system runs smoothly. Users can also type up the occasional text using the keyboard dock, though an external keyboard is the far better choice for more extensive work.

Alongside the low price, the Trekstor Primetab T13B offers smooth system performance and enough performance power for simple applications.

The tablet is designed to rest on its stand, not to be held; such a heavy device cannot be held comfortably for long. Over a longer period, the noticeable blue cast and reflective display surface will also become uncomfortable for sensitive eyes, although the former can be remedied with a calibration. Aside from these issues, office applications, video streaming and surfing all run smoothly.

Trekstor Primetab T13B - 08/20/2018 v6
Mike Wobker

Chassis
76 / 98 → 77%
Keyboard
70%
Pointing Device
79%
Connectivity
46 / 80 → 57%
Weight
69 / 35-78 → 80%
Battery
75%
Display
80%
Games Performance
38 / 68 → 56%
Application Performance
42 / 87 → 48%
Temperature
88%
Noise
100%
Audio
46 / 91 → 50%
Camera
35 / 85 → 41%
Average
65%
75%
Convertible - Weighted Average

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> Notebook / Laptop Reviews and News > Reviews > Trekstor Primetab T13B (N4200, HD505) Convertible Review
Mike Wobker, 2018-08-22 (Update: 2018-08-22)