TEST: Lexar High-Performance 633x 256GB

Technical data
Image
Manufacturer	Lexar
Model number	LSDMI256BBEU633A
Storage capacity	256 GB (233 GiB)
Read speed	100 MB/s
Write speed	45 MB/s
Connection
Price	ca. 25 USD (= 0,10 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

100 %

Write speed

100 %

*) 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 GB file. A total score of 56 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	91,07 MB/s	79,85 MB/s
4K in megabytes per second	7,35 MB/s	3,30 MB/s
4K-64Thrd in megabytes per second	8,58 MB/s	3,69 MB/s
Access time in milliseconds	0,372 ms	1,123 ms
Score	25	15
Total score	56

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 February 01, 2023 shows the performance for simultaneous write and read operations. The lower the duration, the better the performance.

AS SSD Copy-Benchmark	Transfer rate:	Duration:
ISO two large files	73,40 MB/s	14,63 s
Program many small files	31,32 MB/s	44,93 s
Game small and large files	57,93 MB/s	23,84 s

Compression Performance Test

This measures the write and read speed of the SSD is measured depending on the compressibility of the data (according to the manufacturer, these should be 100MB/s and 45MB/s respectively).

CrystalDiskMark Benchmark

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

CDM	Read [MB/s]	Write [MB/s]
SEQ1M Q8T1	92,60	83,68
SEQ1M Q1T1	95,56	82,63
RND4K Q32T16	9,36	4,15
RND4K Q1T1	7,61	3,67

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 10 GB was written to the medium.

HD Tune Pro Benchmark

HD Tune writes a GB file to . 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.

ATTO Disk Benchmark

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

SSD-Z Benchmark

Similar to HD Tune, a 500 MB file is written to here. is written. The transfer data is displayed. The more constant the line, the better.

The benchmark test was performed on February 01, 2023.
Information about the test system can be found at the bottom of the home page.
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