TEST: Transcend JetFlash 790 256GB USB flash driveJetFlash 790

Here you can find a detailed performance and benchmark test.
The the USB flash drive JetFlash 790 with 256GB (TS256GJF790K) from Transcend was tested.


Technical data
Manufacturer Transcend
Type TS256GJF790K
Storage capacity 256 GB (225 GiB)
Read speed 90 MB/s
Write speed 45 MB/s
Price 20 USD (= 0,08 $ / GB)
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Score
89
Price/GB
0,08 $
Compared to the top performer*
Read speed
15 %
Write speed
7 %

*) Test result evaluated according to AS SSD Score within the same size.

AS SSD Benchmark 2.0

Standard performance test

The standard test was performed with a 1 GB file. Here, a total score of 89 points was achieved.

AS SSD TEST: Transcend JetFlash 790 256GB

AS SSD Read: Write:
Seq
in megabytes per second
149,62 MB/s
60,69 MB/s
4K
in megabytes per second
10,67 MB/s
13,39 MB/s
4K-64Thrd
in megabytes per second
11,15 MB/s
13,77 MB/s
Access time
in milliseconds
0,151 ms
0,616 ms
Score
37
33
Total score
89

Copy Performance Test

A common everyday situation is simulated here. Three test folders are created:

  • ISO (folder with two large files)
  • Program (folder with many small files)
  • Game (folder with small and large files)

The three folders are copied using Windows Copy command (the cache remains enabled). The practical test of 17.02.2021 shows the performance for simultaneous write and read operations. The lower the duration, the better.

AS SSD TEST: Transcend JetFlash 790 256GB
AS SSD Kopier-Benchmark Transferrate: Dauer:
ISO
two large files
61,95 MB/s
17,34 s
Program
many small files
32,10 MB/s
43,83 s
Game
small and large files
50,72 MB/s
27,23 s

Compression Performance Test

Here, the write as well as read speed (according to the manufacturer 90 MB/s and 45 MB/s) the Transcend USB flash drive is measured depending on the compressibility of the data.

AS SSD TEST: Transcend JetFlash 790 256GB

CrystalDiskMark 7.0 Benchmark


Similar to AS SSD, two sequential and two random performance tests are performed.

CrystalDiskMark Benchmark TEST: Transcend JetFlash 790 256GB
CDM Read [MB/s] Write [MB/s]
SEQ1M
Q8T1
156,41
64,51
SEQ1M
Q1T1
157,27
66,00
RND4K
Q32T16
12,61
13,80
RND4K
Q1T1
11,36
13,50

Input/Output operations per second

CDM Read [IPOS] Write [IPOS]
SEQ1M
Q8T1
149,20
61,50
SEQ1M
Q1T1
150,00
62,90
RND4K
Q32T16
3.079,10
3.369,10
RND4K
Q1T1
2.774,20
3.295,90

Average latency

CDM Read [µs] Write [µs]
SEQ1M
Q8T1
53.265,40
127.284,00
SEQ1M
Q1T1
6.662,85
15.877,20
RND4K
Q32T16
113.317,00
97.627,40
RND4K
Q1T1
360,18
302,91

ATTO Disk Benchmark 4

Here a 256 MB file is written several times to the 256 GB Transcend USB flash drive. The I/O block size varies (from 512 bytes to 64 megabytes). The larger the blocks, the faster they can usually be written and read.

ATTO Disk Benchmark TEST: Transcend JetFlash 790 256GB

HD Tune Pro 5.75 Benchmark

HD Tune writes a 1 GB file to the 256 GB Transcend USB flash drive. The transfer data of the read speed is displayed graphically. The minimum, maximum and average values are also determined. The determined access time and burst rate are also displayed.

HD Tune TEST: Transcend JetFlash 790 256GB

SSD-Z 16 Benchmark

Similar to HD Tune, a 500 MB file is written to the 256 GB Transcend USB flash drive here. is written. The transfer data is displayed. The more constant the line, the better.

SSD-Z TEST: Transcend JetFlash 790 256GB

Information about the test system can be found at the bottom of the home page.