Crystal Disk Info provides some excellent information about the SSD itself to include its health, product information, ‘power on’ information as well as the characteristics of the SSD. We can see that the SSD is capable of TRIM as it is not greyed out as with AAM and APM.
30GB of host writes were present on the Vertex 450 when received, leading us to believe that burn-in testing was conducted on this SSD.
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.
Listed specifications are 540MB/s read and 525MB/s write performance where our initial ATTO results have reached 551MB/s read and 530MB/s write.
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 OCZ Vertex 450 SSD, performance results are very similar whether we test with compressible or incompressible data and, for this reason, results are displayed utilizing incompressible data.
For both Crystal Diskmark and AS SSD, we have tested the Vertex 450 in a standard system mode (left) with results that can be expected from the typical PC system, as well as testing in an optimized mode (right). To better understand optimized testing and it’s customization, check out ‘The SSD Optimization Guide Win8 (and Win7) Edition‘ and see Point 19.
The difference between the typical system and one that’s been fine tuned is rather obvious in synthetic benchmarks but, believe it or not, most could never visibly see any performance increase whatsoever. Checking out the low 4K write transfer speed of 102MB/s on the left, it should be recognized that only a few select SSDs have been able to surpass the 100MB/s plateau for this disk access. It is a an excellent result and very encouraging for the OCZ Vertex 450 SSD.