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. We are testing with Random or highly incompressible data samples for the Samsung PM830 as this drive does not use compression in storage and test results are very similar regardless of the data sample in use, compressible or incompressible.
The high sequential read and write scores being somewhat lower than ATTO is typical and we honestly expected low 4k random read and write scores as is shown by the 14MB/s read and 30MB/s writes scores. This is definitely the result of a pre-installed OS and further reasoning might even include our choice to create a dual boot system as we did. For the typical user, there is no need to panic though as no visible performance degradation will be observed.
A quick look at our report with the new PM830 shows low 4k results of 21MB/s read and 82MB/s write transfer speeds although performance was below that with all other transfer speed results in the same test.
Up until recently, AS SSD was the only benchmark created specifically for SSD testing and it uses incompressible data which is favored by many SSD enthusiasts. Our left AS SSD result displays transfer speeds with IOPS on the right
Considering that AS SSD is the most difficult of all performance benchmarks, the high sequential write transfer speed of 399MB/s while testing in highly incompressible data is great. The 4k results are, once again, very low and the disk access times are a bit low as well, this again probably a direct result of the pre-installed OS. A quick look at the IOPS result also shows a great 4k-64Thrd result of 66,680 IOPS.
AS SSD Copy Bench is also a great utility as it mimics real life use, in that, it simply creates three files (iso/Program/Game) and moves each from one part of the SSD to another, recording the transfer speed reached and time it took for the transfer. Although we would have liked seeing higher transfer speeds that hit the SATA 3 range, the transfer times are fairly decent.