If you're currently immersed with one of the hot new game demos (in particular, Call of Duty 4 or Unreal Tournament 3), and you're using an NVIDIA based graphics card, you may like to know that NVIDIA have just recommended to us that the new 163.75 beta driver posted up on nZone is the way to go for optimal performance with these two demos.
If you're running an SLI setup, you'll also be glad to know that NVIDIA have provided us with a .XML file to properly enable SLI profiles for these demos as well. They plan to release an updated driver later this week with these profiles already embedded.
Remember to rename the extension from .xm_ to .xml once you've grabbed it. For further instructions on how to manually install it, refer to NVIDIA's notes here.