IOMeter is another open source synthetic benchmarking tool which is able to simulate the various loads placed on hard drive and solid state drive technology.
We use a custom Kitguru configuration for 4k random write to measure performance. We also used a 4k sequential write test today which is the same as the image above, with the slider at the left pulled completely in the other direction.
OCZ rate the 4k random write performance at around 16,000 IOPS, and we managed to score just slightly in excess of this figure. 4k sequential performance was very strong, scoring 51,548 IOPS.