AS SSD:
AS SSD is a benchmark designed specifically for solid state drives. The application contains five synthetic tests which are used to determine the sequential and random read and write performance of a drive.
 ADATA Ultimate SU900 256GB |
 Plextor S3C 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.
 ADATA Ultimate SU900 256GB |
 Plextor S3C 256GB |
HD Tune Pro 5.00:
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 Ultimate SU900's random read and write speeds, random access times and the number of operations per second.
 ADATA Ultimate SU900 256GB - Read Benchmark |
 Plextor S3C 256GB - Read Benchmark |
 ADATA Ultimate SU900 256GB - Write Benchmark |
 Plextor S3C 256GB - Write Benchmark |
The SU900 performed fairly well when benchmarked with HD Tune. The drive had average read and write speeds of 516.8 MB/s and 446.2 MB/s, respectively, and a burst rate of 156.8 MB/s when reading.
 ADATA Ultimate SU900 256GB - Random Access Read |
 Plextor S3C 256GB - Random Access Read |
 ADATA Ultimate SU900 256GB - Random Access Write |
 Plextor S3C 256GB - Random Access Write |
When reading 4KB blocks, the SU900 reached 27,922 IOPS and had an average speed of 109.159 MB/s. The drive was faster when writing, reaching 30,388 IOPS with an average speed of 118.706 MB/s.
