I'm running a 512 stick of Corsair XMS PC3500 at 2-2-2-5 just fine on my PC3200 rated A7N8X DLX GD2 . I'm only running it at 200FSB though, the memory is rated for 216FSB but the board (mine at least) can manage it but you'll probably have to run stock timings. The reason I'm running slower is because my XP2500 gets unstable any higher .