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The Agility 4 has a claimed sequential read speed of 420MB/s, but it fell short of that figure in CrystalDiskMark, reaching 353.4MB/s, while the Crucial v4 beat its quoted speed of 230MB/s, hitting 246.1MB/s. Despite exceeding its listed specs, the v4 was still 44% slower than OCZ's drive.
With a write speed of 408.5MB/s in CrystalDiskMark, the Agility 4 fell just shy of its quoted rate of 410MB/s, but it was still fast enough to beat everything except the Vertex 4. As we saw in the read test, Crucial's offering performed better than expected, beating its claimed write speed of 190MB/s with 222.2MB/s. Nonetheless, the v4 was still slightly slower than the Patriot Torqx 2, Crucial RealSSD C300 and Intel SSD Series.
When measuring random 512K reads, the Agility 4 was 18% faster than the v4, which is one of the smaller margins that we have seen so far. However, random 512K reads were a weakness of the Vertex 4, so we expected no better of OCZ's budget solution.
The Agility 4 looked good when measuring random 512K writes, losing only to the Vertex 4 and outpacing the v4 by 134%.
The Agility 4 was surprisingly strong when measuring random 4K-QD32 performance, sustaining a throughput of 248MB/s, on par with the pricier Vertex 4. The v4, on the other hand, was 74% slower, achieving a throughput of just 64.6MB/s.
As we've seen already, write performance is where the Agility 4 flourishes and it managed to achieve 203.5MB/s in CrystalDiskMark's Random 4K-QD32 write test, only 12% slower than the Vertex 4 and 514% faster than the v4's dismal 33.1MB/s.
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