TEST: Silicon Power Ace A55 512GB SATA SSD

Technical data
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Manufacturer	Silicon Power
Model number	Ace A55
Storage capacity	512 GB (477 GiB)
pSLC-Cache	118 GB approx.
Read speed	500 MB/s
Write speed	450 MB/s
Interface	SATA 6 Gbps
Connection	2.5"
Memory module (NAND)	TLC
TBW (Total Bytes Written)	250 Terabyte
Controller	Phison PS3111-S11
Price	ca. 33 AUD (= 0,06 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

100 %

Write speed

95 %

*) 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 601 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	520,87 MB/s	443,02 MB/s
4K in megabytes per second	25,11 MB/s	87,30 MB/s
4K-64Thrd in megabytes per second	115,59 MB/s	171,83 MB/s
Access time in milliseconds	0,040 ms	0,190 ms
Score	193	303
Total score	601

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 June 17, 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	946,63 MB/s	1,13 s
Program many small files	1139,73 MB/s	1,23 s
Game small and large files	1964,92 MB/s	0,70 s

Compression Performance Test

Here, the writing and reading speed of the the Silicon Power SATA SSDSSD is measured depending on the compressibility of the data (according to the manufacturer, these should be 500MB/s and 450MB/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	549,98	465,20
SEQ1M Q1T1	539,86	459,10
RND4K Q32T16	203,79	182,30
RND4K Q1T1	41,14	94,85