The Release 275 beta driver v275.27 can cause significant performance drop in The Witcher 2. This issue has been resolved in v275.33 drivers. Please read this FAQ for more information on this issue.

 Increases performance for GeForce 400 Series and 500 Series GPUs in several PC games vs. v270.61 WHQL drivers. The following are some examples of improvements measured on Windows 7. Results will vary depending on your GPU and system configuration:

 GeForce GTX 580:
 Up to 4% in Crysis 2
 Up to 5% in Civilization V with SLI
 Up to 9% in Portal 2
 Up to 13% in Bulletstorm with Antialiasing enabled
 Up to 15% in Batman: Arkham Asylum with PhysX High

 GeForce GTX 560:
 Up to 6% in Crysis 2
 Up to 8% in Portal 2
 Up to 14% in Batman: Arkham Asylum with PhysX High
 Up to 15% in Bulletstorm with Antialiasing enabled

 Increases gaming performance by up to 12% for dual-core CPUs in CPU-limited cases.