Random throughputs & NCQ
As on the previous page, here we measure random access performance but with multiple simultaneous accesses. Thanks to NCQ and internal SSD optimisations, the performance levels of some SSDs actually rise in such circumstances, which is typical of heavy usage.
For reads, all the SSDs benefit from NCQ up to 4 simultaneous commands. Beyond this Indilinx-based SSD performance doesn’t increase. The C300 gives the best scores.
When it comes to writes, the picture is more complex. With compressible data, the Corsair F40 and F60, which are not limited by their firmware, unlike the Agility 2, perform extremely well but return to normal with non-compressible data. NCQ is then actually counterproductive. In fact, only the X25-V and the C300 give performance gains with concurrent commands, though the gain is limited.
