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-256M5Pro Xtreme |
 Samsung SSD 840 Pro 256GB |
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-256M5Pro Xtreme |
 Samsung SSD 840 Pro 256GB |
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-256M5Pro Xtreme's random read and write speeds, random access times and the number of operations per second.
 Plextor PX-256M5Pro Xtreme - HD Tune Read Benchmark |
 Samsung SSD 840 Pro 256GB - HD Tune Read Benchmark |
 Plextor PX-256M5Pro Xtreme - HD Tune Write Benchmark |
 Samsung SSD 840 Pro 256GB - HD Tune Write Benchmark |
The PX-256M5Pro Xtreme performed very well when benchmarked with HD Tune. The drive had average read and write speeds of 499.4 MB/s and 414.6 MB/s, respectively, and a burst rate of 378.2 MB/s when reading
 Plextor PX-256M5Pro Xtreme - HD Tune Random Access Read |
 Samsung SSD 840 Pro 256GB - HD Tune Random Access Read |
 Plextor PX-256M5Pro Xtreme - HD Tune Random Access Write |
 Samsung SSD 840 Pro 256GB - HD Tune Random Access Write |
The PX-256M5Pro Xtreme didn't disappoint when doing random reads and writes. When writing 4KB blocks, the drive reached 18,902 IOPS and had an average speed of 73.838 MB/s. The PX-256M5Pro Xtreme was even faster when reading, reaching 22,428 IOPS with an average speed of 87.612 MB/s.
