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. 38 USD (= 0,07 $ / 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 using 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

This measures the write and read 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

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 150 GB was written to the medium. After approx. 118 GB, the pSLC-Cache was full and the performance was throttled.
At least the test file could be read with an average write speed of 468 MB/s and written with 147 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 can be written and read.

SSD-Z Benchmark

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

The benchmark test was performed on June 17, 2023.
Information about the test system can be found at the bottom of the home page.
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