If you don't mind rolling the dice with beta software and own a GeForce graphics card, NVIDIA
has some new drivers that might interest you. The GPU maker released its GeForce 301.24 beta drivers, calling it an "essential upgrade for all GeForce users" since they enable NVIDIA FXAA, NVIDIA Adaptive Sync, and NVIDIA Frame Rate Target on all GeForce 8-series and later GPUs.
That's not all. The new drivers introduce new NVIDIA Surround features for all Surround-capable GPUs, improve performance in a number of titles, and add new SLI and 3D Vision profiles.
NVIDIA's internal testing showed double digit (percentage) performance gains in a number of titles, including Just Cause 2 with SLI (up to 23 percent), Skyrim (up to 21 percent), StarCraft II with SLI (up to 17 percent), and Far Cry 2 with SLI (up to 14 percent) with GeForce GTX 570/580 graphics cards, and up to 20 percent in Skyrim, 15 percent in Just Cause 2 with SLI, 13 percent in Far Cry 2 with SLI, 12 percent in Bulletstorm, 11 percent in Civilization, and 10 percent in StarCraft II with SLI with GeForce 560/560 Ti graphics cards.
You can read all about the new features and performance improvements in the release notes
and NVIDIA's lengthy blog post
with benchmarks. The drivers are available here