If you own an ATi video card, head on over to the AMD / ATi website and
download the new Catalyst 8.6 drivers for Windows Vista/XP and Linux. Along
with the standard performance improvements and bug fixes, the Catalyst 8.6
drivers add OpenGL Quad CrossFireX support for 3 or 4 GPUs in CrossFire mode and
OpenGL Adaptive Anti-Aliasing Custom Filters support. In addition,
HardwareX claims that the these drivers speed up Call of Duty 4 performance
some 35%.