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.
 Samsung SSD 840 Pro 256GB |
 Plextor PX-256M5P |
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.
 Samsung SSD 840 Pro 256GB |
 Plextor PX-256M5P |
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 SSD 840 Pro's random read and write speeds, random access times and the number of operations per second.
 Samsung SSD 840 Pro 256GB - HD Tune Read Benchmark |
 Plextor PX-256M5P - HD Tune Read Benchmark |
 Samsung SSD 840 Pro 256GB - HD Tune Write Benchmark |
 Plextor PX-256M5P - HD Tune Write Benchmark |
The SSD 840 Pro performed very well when benchmarked with HD Tune. The drive had average read and write speeds of 498.9 MB/s and 426.9 MB/s, respectively, and a burst rate of 279.7 MB/s when reading
 Samsung SSD 840 Pro 256GB - HD Tune Random Access Read |
 Plextor PX-256M5P - HD Tune Random Access Read |
 Samsung SSD 840 Pro 256GB - HD Tune Random Access Write |
 Plextor PX-256M5P - HD Tune Random Access Write |
The SSD 840 Pro didn't disappoint when doing random reads and writes. When reading 4KB blocks, the drive reached 19,556 IOPS and had an average speed of 76.443 MB/s. The SSD 840 Pro was even faster when writing, reaching 22,204 IOPS with an average speed of 88.738 MB/s.
