It's probably not wise to turn on TCQ on for your SATA drives if you're running them from the nForce 4 chipset. AMDZone reports:Read more here.I have not been able to get TCQ working reliably with the current nForce4 drivers, they are the worst nvidia drivers I've seen in a long time. Every time I've enabled TCQ in either the 32-bit or 64-bit versions of windows, I get massive corruption of files.