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 250GB |
 SanDisk Ultra Plus SSD 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.
 Samsung SSD 840 250GB |
 SanDisk Ultra Plus SSD 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 SSD 840's random read and write speeds, random access times and the number of operations per second.
 Samsung SSD 840 250GB - HD Tune Read Benchmark |
 SanDisk Ultra Plus SSD 256GB - HD Tune Read Benchmark |
 Samsung SSD 840 250GB - HD Tune Write Benchmark |
 SanDisk Ultra Plus SSD 256GB - HD Tune Write Benchmark |
The SSD 840 performed relatively well when benchmarked with HD Tune. The drive had average read and write speeds of 404.9 MB/s and 246.6 MB/s, respectively, as well as a burst rate of 215.8 MB/s when reading.
 Samsung SSD 840 250GB - HD Tune Random Access Read |
 SanDisk Ultra Plus SSD 256GB - HD Tune Random Access Read |
 Samsung SSD 840 250GB - HD Tune Random Access Write |
 SanDisk Ultra Plus SSD 256GB - HD Tune Random Access Write |
The SSD 840 didn't disappoint when doing random reads and writes. When reading 4KB blocks, the drive reached 18,087 IOPS and had an average speed of 70.665 MB/s. The SSD 840 was even faster when writing, reaching 21,851 IOPS with an average speed of 85.358 MB/s.
