TEST: SanDisk Ultra Curve 256GB USB flash drive

Here you can find a detailed performance and benchmark test of the USB flash drive Ultra Curve with 256GB (SDCZ550-256G-G46) from SanDisk.
Score
28
Price/GB
0,09 €


Technical data
Image Ultra Curve
Manufacturer SanDisk
Model number SDCZ550-256G-G46
Storage capacity 256 GB (233 GiB)
Read speed 100 MB/s
Write speed 50 MB/s
Connection USB Typ A
Price ca. 22 USD (= 0,09 $ / GB)
Paid link Buy on Amazon
Compare Product
Compared to the top performer*
Read speed
10 %
Write speed
6 %

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

AS SSD Benchmark

Standard performance test

The standard test was performed using a 1 GB file. A total score of 28 points was achieved.

AS SSD TEST: SanDisk Ultra Curve 256GB

AS SSD Read: Write:
Seq
in megabytes per second
77,59 MB/s
60,08 MB/s
4K
in megabytes per second
2,97 MB/s
0,50 MB/s
4K-64Thrd
in megabytes per second
2,71 MB/s
0,51 MB/s
Access time
in milliseconds
0,888 ms
23,006 ms
Score
13
7
Total score
28

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 August 02, 2024 shows the performance for simultaneous write and read operations. The lower the duration, the better the performance.

AS SSD TEST: SanDisk Ultra Curve 256GB
AS SSD Copy-Benchmark Transfer rate: Duration:
ISO
two large files
49,79 MB/s
21,57 s
Program
many small files
8,17 MB/s
172,23 s
Game
small and large files
17,30 MB/s
79,84 s

Compression Performance Test

This measures the write and read speed of the SanDisk USB flash drive, depending on the compressibility of the data (according to the manufacturer, these should be 100 MB/s and 50 MB/s respectively).

AS SSD TEST: SanDisk Ultra Curve 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: SanDisk Ultra Curve 256GB
CDM Read [MB/s] Write [MB/s]
SEQ1M
Q8T1
105,18
61,12
SEQ1M
Q1T1
105,21
59,06
RND4K
Q32T16
5,65
1,61
RND4K
Q1T1
5,61
1,50

Input/Output operations per second

CDM Read [IOPS] Write [IOPS]
SEQ1M
Q8T1
100,30
58,30
SEQ1M
Q1T1
100,30
56,30
RND4K
Q32T16
1.380,10
394,00
RND4K
Q1T1
1.369,90
366,70

Average latency

CDM Read [µs] Write [µs]
SEQ1M
Q8T1
78.932,50
135.373,00
SEQ1M
Q1T1
9.951,15
17.726,40
RND4K
Q32T16
158.552,00
284.460,00
RND4K
Q1T1
729,71
2.724,33

HD Tune Pro Endurance test

This is a long term test to make full use of the memory capacity. You can see when a cache is full and the writing performance decreases. A test file of 4 GB was written to the medium.

HD Tune Endurance Test TEST: SanDisk Ultra Curve 256GB

HD Tune Pro Benchmark

HD Tune writes a 1 GB file to the 256 GB SanDisk 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: SanDisk Ultra Curve 256GB

ATTO Disk Benchmark

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

ATTO Disk Benchmark TEST: SanDisk Ultra Curve 256GB

SSD-Z Benchmark

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

SSD-Z TEST: SanDisk Ultra Curve 256GB


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