ATTO Disk Benchmark is perhaps one of the oldest benchmarks going and is definitely the main staple for manufacturer performance specifications. ATTO uses RAW or compressible data and, for our benchmarks, we use a set length of 256mb and test both the read and write performance of various transfer sizes ranging from 0.5 to 8192kb. Manufacturers prefer this method of testing as it deals with raw (compressible) data rather than random (includes incompressible data) which, although more realistic, results in lower performance results.
ATTO Disk Benchmark provided highs of 556MB/s read and 336MB/s write transfer speeds which exceed specifications listed by Samsung.
Crystal Disk Benchmark is used to measure read and write performance through sampling of raw (0/1 Fill/compressible) or random data which is, for the most part, incompressible. In the Samsung PM841 512GB mSATA SSD, performance results are very similar whether we test with compressible or incompressible data and, for this reason, results are displayed utilizing incompressible data.
Typically, Crystal DiskMark results are lower than that of ATTO Disk Benchmark, the reasoning being of course that incompressible data samples are used for testing in CDM. Overall, these are great scores, considering the form factor and capacity of the Samsung PM841 SSD.
Up until recently, AS SSD was the only benchmark created specifically for SSD testing and it uses incompressible data. AS SSD, for the most part, gives us the ‘worst case scenario’ in SSD transfer speeds because of its use of incompressible data and many enthusiasts like to AS SSD for their needs. Transfer speeds are displayed on the left with IOPS results on the right.
A great Total Score is seen with AS SSD as well as a high IOPS result of 90966 IOPS. AS SSD Copy Bench displayed the quality of the SSD as well, resulting in SATA 3 level transfer speeds during the transfer of all three files.