TEST: ADATA XPG SX900 512GB SATA SSD

Technical data
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Manufacturer	ADATA
Model number	ASX900S3-512GM-C
Storage capacity	512 GB (477 GiB)
pSLC-Cache	>300 GB approx.
Read speed	550 MB/s
Write speed	520 MB/s
Interface	SATA 6 Gbps
Connection	2.5"
Price	ca. 50 AUD (= 0,10 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

100 %

Write speed

55 %

*) 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 586 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	517,74 MB/s	288,02 MB/s
4K in megabytes per second	23,83 MB/s	19,53 MB/s
4K-64Thrd in megabytes per second	192,97 MB/s	133,98 MB/s
Access time in milliseconds	0,140 ms	0,215 ms
Score	269	182
Total score	586

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 12, 2024 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	795,18 MB/s	1,35 s
Program many small files	1009,46 MB/s	1,39 s
Game small and large files	1907,57 MB/s	0,72 s

Compression Performance Test

Here, the writing and reading speed of the the ADATA SATA SSDSSD is measured depending on the compressibility of the data (according to the manufacturer, these should be 550MB/s and 520MB/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	549,02	267,83
SEQ1M Q1T1	526,68	276,60
RND4K Q32T16	199,86	104,21
RND4K Q1T1	24,16	24,28