AS SSD is a benchmark that uses non-compressible and completely random data. What this means is that the drives using the SF-2281 controller cannot compress the data first, which takes away one of the strong advantages of this controller. Therefore this is a useful benchmark because drives that use the SF-2281 don't gain an upper hand.
The Plextor M5 Pro got off to a promising start as its sequential read and write speeds were amongst the best. Its sequential write speeds, in particular, were faster than SandForce drives and was bested only by the OCZ Vertex 4. Its performance on the 4k 64 threads run was also encouraging, again significantly faster than any SandForce drive, but again, it was slightly slower than the OCZ Vertex 4.
Its performance on the copy benchmark was also strong, recording the fastest speeds in the ISO workload and was competitive in both the Program and Game workloads.