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.
 SanDisk Extreme PRO SSD 480GB |
 Samsung SSD 850 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.
 SanDisk Extreme PRO SSD 480GB |
 Samsung SSD 850 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 Extreme PRO's random read and write speeds, random access times and the number of operations per second.
 SanDisk Extreme PRO SSD 480GB - HD Tune Read Benchmark |
 Samsung SSD 850 PRO 256GB - HD Tune Read Benchmark |
 SanDisk Extreme PRO SSD 480GB - HD Tune Write Benchmark |
 Samsung SSD 850 PRO 256GB - HD Tune Write Benchmark |
The Extreme PRO performed very well when benchmarked with HD Tune. The drive had average read and write speeds of 511.1 MB/s and 459.2 MB/s, respectively, and a burst rate of 116.3 MB/s when reading
 SanDisk Extreme PRO SSD 480GB - HD Tune Random Access Read |
 Samsung SSD 850 PRO 256GB - HD Tune Random Access Read |
 SanDisk Extreme PRO SSD 480GB - HD Tune Random Access Write |
 Samsung SSD 850 PRO 256GB - HD Tune Random Access Write |
The Extreme PRO didn't disappoint when doing random reads and writes. When writing 4KB blocks, the drive reached 20,913 IOPS and had an average speed of 81.692 MB/s. The Extreme PRO was even faster when reading, reaching 29,442 IOPS with an average speed of 115.008 MB/s.
