If you own an ATi video card, head on over to the AMD / ATi website and
download the new Catalyst 7.12 drivers
for Windows Vista x86, Windows Vista x64, Windows XP, and Windows XP Pro x64.
Word is: "This release of Catalyst introduces an enhanced version of ATI
Overdrive for the ATI Radeon HD 2900 Series. Users can now Overclock both GPU
engine and graphics memory clock speeds in Crossfire mode (and over-clock single
ATI Radeon graphics accelerators as well). This version of ATI Overdrive also
includes a new stress test application to verify any over-clocking speeds users
may have configured (either manually or through the auto-tuning tool) on their
ATI Radeon HD 2900 Series of graphics accelerators."