Well I guess I lucked-out. RT does slow down my pair of BFG 7800 GTs. (ASUS A8N32) I have no idea why. I'm using the same graphics driver as you all. Only difference is that this mobo has a slightly different chipset (dual 16X lanes in SLI) and a NB & SB just like in the good 'ole pre AMD-64 days. My chipset driver is different than yours. The bad news is that they still sound like a pair of banshees at 25% and I don't want to mess with turning them down even more with the command line options. I had some good cooling results with a Zalman heat pipe silent cooler (even with modest overclocking) on my ATI 9800 so I may go that route again...but I need to burn these cards in and tweak them for a while before I do that.