TEST: Silicon Power Ace A55 256GB SATA SSD

Technical data
Image
Manufacturer	Silicon Power
Model number	SP256GBSS3A55S25
Storage capacity	256 GB (238 GiB)
pSLC-Cache	58 GB approx.
Read speed	460 MB/s
Write speed	450 MB/s
Interface	SATA 6 Gbps
Connection	2.5"
Memory module (NAND)	TLC
TBW (Total Bytes Written)	125 Terabyte
Controller	Phison PS3111-S11
Price	ca. 21 AUD (= 0,08 $ / GB)
Paid link	Buy on Amazon

Compare Product

Compared to the top performer*

Read speed

100 %

Write speed

84 %

*) 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 525 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	521,13 MB/s	389,72 MB/s
4K in megabytes per second	25,67 MB/s	88,39 MB/s
4K-64Thrd in megabytes per second	70,49 MB/s	168,97 MB/s
Access time in milliseconds	0,040 ms	0,173 ms
Score	148	296
Total score	525

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.

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 460MB/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	550,81	407,35
SEQ1M Q1T1	538,65	409,66
RND4K Q32T16	136,67	181,19
RND4K Q1T1	41,26	93,48