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 850 EVO 1TB |
 Samsung SSD 850 EVO 1TB (RAPID Mode) |
 Samsung SSD 850 EVO 120GB |
 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.
 Samsung SSD 850 EVO 1TB |
 Samsung SSD 850 EVO 1TB (RAPID Mode) |
 Samsung SSD 850 EVO 120GB |
 Samsung SSD 850 PRO 256GB |
HD Tune Pro 5.00:
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 850 EVO's random read and write speeds, random access times and the number of operations per second.
 Samsung SSD 850 EVO 1TB - Read Benchmark |
 Samsung SSD 850 EVO 1TB (RAPID Mode) - Read Benchmark |
 Samsung SSD 850 EVO 120GB - Read Benchmark |
 Samsung SSD 850 PRO 256GB - Read Benchmark |
 Samsung SSD 850 EVO 1TB - Write Benchmark |
 Samsung SSD 850 EVO 1TB (RAPID Mode) - Write Benchmark |
 Samsung SSD 850 EVO 120GB - Write Benchmark |
 Samsung SSD 850 PRO 256GB - Write Benchmark |
The 1TB 850 EVO performed relatively well when benchmarked with HD Tune. The drive had average read and write speeds of 388.4 MB/s and 371.4 MB/s, respectively, and a burst rate of 240.3 MB/s when reading. Surprisingly, RAPID mode had very little impact on the drive's read speed. However, it was slightly faster when writing.
 Samsung SSD 850 EVO 1TB - Random Access Read |
 Samsung SSD 850 EVO 1TB (RAPID Mode) - Random Access Read |
 Samsung SSD 850 EVO 120GB - Random Access Read |
 Samsung SSD 850 PRO 256GB - Random Access Read |
 Samsung SSD 850 EVO 1TB - Random Access Write |
 Samsung SSD 850 EVO 1TB (RAPID Mode) - Random Access Write |
 Samsung SSD 850 EVO 120GB - Random Access Write |
 Samsung SSD 850 PRO 256GB - Random Access Write |
The 1TB 850 EVO didn't disappoint when doing random reads and writes. When reading 4KB blocks, it reached 22,802 IOPS and had an average speed of 89.074 MB/s. The drive was slightly faster when writing, reaching 24,805 IOPS with an average speed of 96.896 MB/s. As you can see, RAPID mode gave the 1TB 850 EVO's random read and write performance a considerable boost. With it enabled, the drive reached 121,862 random read IOPS and 100,210 random write IOPS.
