Not really completely on topic, but there seems to be a reason that NCQ is disabled by default. ALL benches go down on my array (2x 1TB Samsung F3 7200RPMs in RAID0 on SB750/790FX by a considerable amount, with HDTune's bench often hovering around 1.9MB/s. Disabling NCQ takes my minimum to around 60MB/s for a very brief time. It's not just the one bench, everything crawls. For example if I double click on a folder, there can be a pause of a few seconds where the hard drive activity light is on solid but I can hear the drives are idle. The drives themselves are fine, they were each tested for a solid seven days before being put in the array and all problems disappear with NCQ disabled.