Ok, so I'm planning to run 2 HD4870s (one I have, another coming shortly) however to do this I need to upgrade my board (currently running the Asus P5B Deluxe Wifi). I've been looking at many boards and I'm struggling to find a S775 board that supports Crossfire X. Any pointers? I'm looking at the Abit x38 QuadGT as I'd prefer to not have to replace my DDR2 with DDR3 at this point.