Alex Schepeljanski of Alex Intelligent Software develops the free AS SSD Benchmark utility for testing storage devices. The AS SSD Benchmark tests sequential read and write speeds, input/output operational performance, and response times.
AS-SSD Benchmark uses compressed data, so sequential file transfer speeds may be reported lower than with other tools using uncompressed data. For this reason, we will concentrate on the operational IOPS performance in this section.
Beginning with sequential transfer performance, the 240GB Premier SP550 solid state drive produced speeds up to 515.82MB/s for sequential reads and 470.93MB/s for sequential writes. Single-threaded 4K performance tests delivered 26.80MB/s reads and 73.79MB/s writes, while the 64-thread 4K read test recorded 332.21MB/s with write performance at 169.74 MB/s.
240GB Premier SP550 SSD AS-SSD Results
The chart below summarizes AS-SSD 64-thread 4KB IOPS performance results among a variety of enthusiast-level SSDs. The ADATA SP550 acquits itself pretty well in the read department– its score is only 13% below the top-performing Samsung 850 EVO– but its write performance in this part of the benchmark is the third worst. As you can see this is far below the single-threaded write performance and may show a weakness in the drive’s IOPS handling ability.
In the next section, Benchmark Reviews tests transfer rates using ATTO Disk Benchmark.