" It appears there might be a data corruption problem when enabling TCQ on the nForce 4 chipset at least with the Asus A8N-SLI Deluxe. Check out this forum post for more detais. I've yet to try TCQ as all of our Western Digital Raptors are in a server. You can learn about TCQ in this pdf from Western Digital. Anyway you may want to take some caution when enabling TCQ and make sure you do have a backup. Here is a post from sadtherobot on the alledged issue. "