The next benchmark is the CrystalDiskMark. The software provides throughput data based on sequential reads and writes, and random (512K/4K/4KQD32) reads and writes of various sizes. Below you see the drive's performance with incompressible (0Fill) data:
Sequential speeds reach up to around 485MB/s read and write. 4K read and write reach about 31MB/s read and an impressive 148MB/s write. OCZ calculated their IOPS rating via this benchmark’s 4K QD 32 test . In order to convert MB/s to IOPS you use this equation: (MBps Throughput / KB per IO) * 1024 Thus, the 480GB model reached (281.9MBps/4KB)*1024 = 72,166 IOPS read and 72,473 IOPS write. The figures are somehow lower than those quoted by OCZ.
Random writing of small 4K files was very fast (148 MB/s) and random writing of 512MB files was also high (470 MB/s). In the reading part with small 4K and 4kQD32, there is still some room for improvement.