AS SSD performs different types of read and write tests using data that isn't easily compressible. All of the drives are able to achieve fast sequential read speeds. The similarly classed OCZ and OWC drives with toggle NAND perform closely. The HyperX 3K (with synchronous NAND and less dies per channel than the toggle NAND drives) expectedly performs slower with 4K reads with high queue depth, but is able to do well with 4K reads. Crucial's m4 does performs the best at 4K reads, both without a queue and with a large queue. Compared with the performance offered by the 256GB m4 shows how much Crucial's newer SSD firmware improved 4K read performance with high queue levels.
With the write tests, the two toggle NAND drives come out on top. OWC's Mercury EXTREME Pro takes first, with OCZ's Vertex 3 Max IOPS closely behind. For 4K writes, all of the drives perform similarly. When the queue depth is increased for 4K writes, the m4 and HyperX 3K fall to a third place tie.