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 EVO mSATA 1TB |
 Samsung SSD 840 EVO mSATA 1TB (RAPID Mode) |
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 EVO mSATA 1TB |
 Samsung SSD 840 EVO mSATA 1TB (RAPID Mode) |
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 840 EVO mSATA's random read and write speeds, random access times and the number of operations per second.
 Samsung SSD 840 EVO mSATA 1TB - HD Tune Read Benchmark |
 Samsung SSD 840 EVO mSATA 1TB (RAPID Mode) - HD Tune Read Benchmark |
 Samsung SSD 840 EVO mSATA 1TB - HD Tune Write Benchmark |
 Samsung SSD 840 EVO mSATA 1TB (RAPID Mode) - HD Tune Write Benchmark |
The SSD 840 EVO performed very well when benchmarked with HD Tune. The drive had average read and write speeds of 498.1 MB/s and 365.8 MB/s, respectively, and a burst rate of about 276 MB/s. Surprisingly, RAPID mode had very little impact on the drive's read speed. However, it was slightly faster when writing.
 Samsung SSD 840 EVO mSATA 1TB - HD Tune Random Access Read |
 Samsung SSD 840 EVO mSATA 1TB (RAPID Mode) - HD Tune Random Access Read |
 Samsung SSD 840 EVO mSATA 1TB - HD Tune Random Access Write |
 Samsung SSD 840 EVO mSATA 1TB (RAPID Mode) - HD Tune Random Access Write |
The SSD 840 EVO didn't disappoint when doing random reads and writes. When reading 4KB blocks, it reached 20,452 IOPS and had an average speed of 79.894MB/s. The drive was slightly faster when writing, reaching 22,716 IOPS with an average speed of 88.738 MB/s. As you can see, RAPID mode gave the 840 EVO mSATA's random read and write performance a considerable boost. With it enabled, the drive reached 142,694 random read IOPS and 127,665 random write IOPS.
