Yapt

Yapt (yet another performance test) is a benchmark recommended by a pair of drive manufacturers and was incredibly difficult to locate as it hasn't been updated or used in quite some time.  That doesn't make it irrelevant by any means though, as the benchmark is quite useful.  It creates a test file of about 100 MB in size and runs both random and sequential read and write tests with it while changing the data I/O size in the process.  The results are a good look at overall drive performance.

yapt-randreads.png

yapt-randwrites.png

yapt-seqreads.png

yapt-seqwrites.png

Save the smallest capacity of the Crucial M550, we see fairly consistent performance across the board in YAPT. As an important note, this is not the same spread we saw with the ADATA SP920. Here's a look at the write specific results from that review:

yapt-randwrites-0.png

yapt-seqwrites-0.png

There is clearly a difference in Crucial's firmware tuning and die count selections that are enabling higher performance, especially in the smaller capacities. While ADATA's models are comparable to Crucial in the 512GB and 1TB capacity points, ADATA falls short much faster in 256GB and especially so at the 128GB capacity.

To repeat an earlier point, YAPT is not a 4k aligned test, and the Intel SSD 730 has more of an issue with non-aligned writing than the other drives here, explaining the off results seen above.

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