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.
 Toshiba OCZ RD400 512GB |
 Samsung 950 PRO 512GB |
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.
 Toshiba OCZ RD400 512GB |
 Samsung 950 PRO 512GB |
HD Tune Pro 5.50:
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 RD400's random read and write speeds, random access times and the number of operations per second.
 Toshiba OCZ RD400 512GB - Read Benchmark |
 Samsung 950 PRO 512GB - Read Benchmark |
 Toshiba OCZ RD400 512GB - Write Benchmark |
 Samsung 950 PRO 512GB - Write Benchmark |
The RD400 performed very well when benchmarked with HD Tune. The drive had average read and write speeds of 2452.9 MB/s and 1094.4 MB/s, respectively, and a burst rate of 1223.0 MB/s when reading.
 Toshiba OCZ RD400 512GB - Random Access Read |
 Samsung 950 PRO 512GB - Random Access Read |
 Toshiba OCZ RD400 512GB - Random Access Write |
 Samsung 950 PRO 512GB - Random Access Write |
The RD400 didn't disappoint when doing random reads and writes. When reading 4KB blocks, the drive reached 47,194 IOPS and had an average speed of 184.353 MB/s. It was even faster when writing, reaching 52,700 IOPS with an average speed of 205.863 MB/s.
