TEST: Vansuny U51 256GB USB flash drive

Here you can find a detailed performance and benchmark test of the USB flash drive U51 with 256GB (U51-Cyan-256F-3.0-DE) from Vansuny.
Score
34
Price/GB
0,07 €


Technical data
Image U51
Manufacturer Vansuny
Model number U51-Cyan-256F-3.0-DE
Storage capacity 256 GB (234 GiB)
Read speed 75 MB/s
Write speed 25 MB/s
Connection USB Typ A
Price ca. 19 USD (= 0,07 $ / GB)
Paid link Buy on Amazon
Compare Product
Compared to the top performer*
Read speed
13 %
Write speed
2 %

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

AS SSD Benchmark

Standard performance test

The standard test was performed with a 1 GB file. A total score of 34 points was achieved.

AS SSD TEST: Vansuny U51 256GB

AS SSD Read: Write:
Seq
in megabytes per second
131,34 MB/s
22,85 MB/s
4K
in megabytes per second
4,77 MB/s
0,65 MB/s
4K-64Thrd
in megabytes per second
4,21 MB/s
0,72 MB/s
Access time
in milliseconds
1,069 ms
5,400 ms
Score
22
4
Total score
34

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 the Windows Copy command (the cache remains enabled). The practical test of September 17, 2023 shows the performance for simultaneous write and read operations. The lower the duration, the better the performance.

AS SSD TEST: Vansuny U51 256GB
AS SSD Copy-Benchmark Transfer rate: Duration:
ISO
two large files
22,97 MB/s
46,76 s
Program
many small files
10,35 MB/s
135,97 s
Game
small and large files
20,66 MB/s
66,83 s

Compression Performance Test

Here, the writing and reading speed of the the Vansuny USB flash driveSSD is measured depending on the compressibility of the data (according to the manufacturer, these should be 75MB/s and 25MB/s respectively).

AS SSD TEST: Vansuny U51 256GB

CrystalDiskMark Benchmark

Here, two sequential and two random performance tests are performed, similar to the ones performed on the AS SSD.

CrystalDiskMark Benchmark TEST: Vansuny U51 256GB
CDM Read [MB/s] Write [MB/s]
SEQ1M
Q8T1
137,83
106,60
SEQ1M
Q1T1
137,03
106,48
RND4K
Q32T16
6,04
0,58
RND4K
Q1T1
4,81
0,50

Input/Output operations per second

CDM Read [IOPS] Write [IOPS]
SEQ1M
Q8T1
131,40
101,70
SEQ1M
Q1T1
130,70
101,50
RND4K
Q32T16
1.474,10
140,40
RND4K
Q1T1
1.173,60
123,00

Average latency

CDM Read [µs] Write [µs]
SEQ1M
Q8T1
60.327,70
77.777,60
SEQ1M
Q1T1
7.649,79
9.826,78
RND4K
Q32T16
174.903,00
473.753,00
RND4K
Q1T1
851,59
8.104,66

HD Tune Pro Benchmark

HD Tune writes a 1 GB file to the 256 GB Vansuny 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: Vansuny U51 256GB

ATTO Disk Benchmark

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

ATTO Disk Benchmark TEST: Vansuny U51 256GB


Information about the test system can be found at the bottom of the home page.
As an Amazon Associate I earn from qualifying purchases.