TEST: Silicon Power Ace A55 2TB SATA SSD

Technical data
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Manufacturer	Silicon Power
Model number	SP002TBSS3A55S25
Storage capacity	2048 GB (1863 GiB)
pSLC-Cache	>250 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)	1000 Terabyte
Controller	Phison PS3111-S11
Price	ca. 120 AUD (= 0,06 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

98 %

Write speed

86 %

*) 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 633 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	514,47 MB/s	434,40 MB/s
4K in megabytes per second	22,11 MB/s	87,49 MB/s
4K-64Thrd in megabytes per second	147,32 MB/s	163,30 MB/s
Access time in milliseconds	0,129 ms	0,243 ms
Score	221	294
Total score	633

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 April 13, 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	2748,71 MB/s	0,39 s
Program many small files	338,23 MB/s	4,16 s
Game small and large files	928,41 MB/s	1,49 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	543,58	454,33
SEQ1M Q1T1	533,52	443,93
RND4K Q32T16	156,69	179,10
RND4K Q1T1	23,50	93,27