OCZ Vertex 4 256 GB Solid State Drive Review

Compressible Data Test

As you will have gathered from the previous page, we measured the performance of each drive using two different programs: CrystalDiskMark and AS SSD. It is important to note that we connected the SSDs to a SATA-600 port on our motherboard rather than a SATA-300 port that could cause performance limitations.

We set CrystalDiskMark to “All 0x00 Fill Mode” to evaluate the performance of the SSD when dealing with compressible data.

In the sequential read test using compressible data, the Kingston HyperX 3K outperformed the OCZ Vertex 4 by a margin of 18 percent. However, in the sequential write test using compressible data, the two
drives exhibited a similar level of performance.

Moving on to the random read test using 512 KB blocks, the Kingston HyperX also came out on top, achieving 33% better performance than the OCZ Vertex 4. Once again, in the write test using 512 KB blocks, the two drives exhibited a similar level of performance.

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In the random read test using 4 KB blocks, the Kingston HyperX 3K achieved the best level of performance, scoring 13% better than the OCZ Vertex 4. However, in the random write test using 4 KB blocks, the Kingston HyperX 3K’s lead narrowed to only 3% over the OCZ Vertex 4.