The newest drivers for nVidia were released today, the first drivers in 5 months to not be “beta.” This brought minor game performance improvements among other things. You can download the new drivers here.
I would like to point out to people reading this that I personally, and some others on the nVidia forums, aren’t having the best of times with these drivers. My speakers are putting out a really annoying static sound when they’re turned on. Others are reporting install issues in Windows Vista (i.e. they won’t install at all). One person recommends using the 174.74 drivers until the issues can be sorted out, but I haven’t tested these out myself yet. All in all, make sure that you are upgrading to the newest drivers for a good reason, otherwise stick with the ones you have that work.