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 512GB |
 Samsung SSD 840 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.
 Samsung SSD 840 Pro 512GB |
 Samsung SSD 840 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 SSD 840 Pro's random read and write speeds, random access times and the number of operations per second.
 Samsung SSD 840 Pro 512GB - HD Tune Read Benchmark |
 Samsung SSD 840 Pro 256GB - HD Tune Read Benchmark |
 Samsung SSD 840 Pro 512GB - HD Tune Write Benchmark |
 Samsung SSD 840 Pro 256GB - 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 419.6 MB/s, respectively, and a burst rate of 287.1 MB/s when reading
 Samsung SSD 840 Pro 512GB - HD Tune Random Access Read |
 Samsung SSD 840 Pro 256GB - HD Tune Random Access Read |
 Samsung SSD 840 Pro 512GB - HD Tune Random Access Write |
 Samsung SSD 840 Pro 256GB - HD Tune Random Access Write |
The 512GB SSD 840 Pro didn't disappoint when doing random reads and writes. When reading 4KB blocks, the drive reached 19,644 IOPS and had an average speed of 76.738 MB/s. The SSD 840 Pro was slightly faster when writing, reaching 20,019 IOPS with an average speed of 78.202 MB/s.
