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. 80 USD (= 0,04 $ / 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 using 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

This measures the write and read speed of the the Silicon Power SATA SSD, depending on the compressibility of the data (according to the manufacturer, these should be 500 MB/s and 450 MB/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

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 250 GB was written to the medium. The exact cache size could not be determined, because the test file did not exhaust the cache (brought it to the limit).At least the test file could be read with an average write speed of 525 MB/s and written with 438 MB/s.

HD Tune Pro Benchmark

HD Tune writes a 1 GB file to the Silicon Power SATA SSD. 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 Silicon Power SATA SSD. The I/O block size varies (from 512 bytes to 64 megabytes). The larger the blocks, the faster they were written and read.

SSD-Z Benchmark

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

The benchmark test was performed on April 13, 2023.
Information about the test system can be found at the bottom of the home page.
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