AS SSD:
AS SSD is a relatively new benchmark designed specifically for solid state drives. The application contains five synthetic tests used to determine the sequential and random read and write performance of a drive.
 Plextor PX-256M5M |
 Plextor PX-256M5Pro Xtreme |
AS SSD also includes a copy benchmark. This test copies an ISO (two large files), program (many small files) and game (small and large files), returning the speed and duration of each.
 Plextor PX-256M5M |
 Plextor PX-256M5Pro Xtreme |
HD Tune Pro 4.61:
Next, I ran a series of tests using HD Tune Pro. This hard disk utility measures a drive's performance by testing its sequential read and write speeds as well as its access time, burst rate and CPU usage. For this review, I'm also going to use it to benchmark the PX-256M5M's random read and write speeds, random access times and the number of operations per second.
 Plextor PX-256M5M - HD Tune Read Benchmark |
 Plextor PX-256M5Pro Xtreme - HD Tune Read Benchmark |
 Plextor PX-256M5M - HD Tune Write Benchmark |
 Plextor PX-256M5Pro Xtreme - HD Tune Write Benchmark |
The PX-256M5M performed very well when benchmarked with HD Tune. The drive had average read and write speeds of 497.8 MB/s and 383.3 MB/s, respectively, and a burst rate of 371.4 MB/s when reading
 Plextor PX-256M5M - HD Tune Random Access Read |
 Plextor PX-256M5Pro Xtreme - HD Tune Random Access Read |
 Plextor PX-256M5M - HD Tune Random Access Write |
 Plextor PX-256M5Pro Xtreme - HD Tune Random Access Write |
The PX-256M5M didn't disappoint when doing random reads and writes. When writing 4KB blocks, the drive reached 19,374 IOPS and had an average speed of 75.681 MB/s. The PX-256M5M was even faster when reading, reaching 21,589 IOPS with an average speed of 84.335 MB/s.
