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-256M5P |
 OCZ Vertex 4 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-256M5P |
 OCZ Vertex 4 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 Vertex 4's random read and write speeds, random access times and the number of operations per second.
 Plextor PX-256M5P - HD Tune Read Benchmark |
 OCZ Vertex 4 256GB - HD Tune Read Benchmark |
 Plextor PX-256M5P - HD Tune Write Benchmark |
 OCZ Vertex 4 256GB - HD Tune Write Benchmark |
The PX-256M5P performed very well when benchmarked with HD Tune. The drive had average read and write speeds of 498.4 MB/s and 412.6 MB/s, respectively, and a burst rate of more than 380 MB/s
 Plextor PX-256M5P - HD Tune Random Access Read |
 OCZ Vertex 4 256GB - HD Tune Random Access Read |
 Plextor PX-256M5P - HD Tune Random Access Write |
 OCZ Vertex 4 256GB - HD Tune Random Access Write |
The PX-256M5P didn't disappoint when doing random reads and writes. When writing 4KB blocks, the drive reached 19,299 IOPS and had an average speed of 75.387 MB/s. The PX-256M5P was even faster when reading, reaching 22,571 IOPS with an average speed of 88.169 MB/s.
