CrystalDiskMark is an easy-to-run and quick utility to use to gauge a drive’s performance. It measures sequential read and write performance and random read and write speeds of random 4KB, 4KB (queue depth 32) and 512KB data.
On CrystalDiskMark, the Agility 4 is clearly no match for its more illustrious Vertex 4 sibling. Compared to the Vertex 4, the Agility 4’s read performance was generally about 65% to 70% that of the Vertex 4, while write performance fared better at around 75% to 80%. Even though it was slower than the Vertex 4, the Agility 4’s write performance was arguably better than any of the SandForce drives, and this was apparent on the sequential, 512KB and 4KB, 64 threads workloads.