I have my Corsair Dominator GT DDR3-2000 6GB kit in my P6T Deluxe but it is only showing 4GB in the BIOS and of course in Windows 7. I've swapped the modules around with the same results. I tried another 6GB Triple channel kit and both the BIOS and Windows 7 show 6GB.

I know this Corsair Dominator GT kit worked in my P6T Deluxe as I've got screenshots to prove it. Any suggestions or am I going to end up with a RMA?