Nvidia has launched the GeForce 320.14 Beta Drivers that provide up to 10 percent better performance in Metro: Last Light and improvements of up to 20 percent for a range of other titles when compared to the GeForce 314.22 WHQL drivers.
Though results will vary, depending on your system's configuration, Nvidia has provided the following "measured gains" for a GTX 660 in both a solo and SLI configurations.
|Title||GTX 660||GTX 660 SLI|
|Battlefield 3||-||Up to 6%|
|Dirt: Showdown||Up to 20%||Up to 17%|
|Deus Ex: Human Revolutions||Up to 6%||Up to 6%|
|F1 2012||Up to 5%||Up to 5%|
|Far Cry 3||Up to 6%||Up to 6%|
|Metro 2033||Up to 6%||-|
|StarCraft II||Up to 8%||Up to 7%|
|Tomb Raider||Up to 18%||Up to 18%|
Finally, the drivers included added or updated SLI profiles for a range of titles that include Alien Fear, Call of Juarez: Gunslinger, Dead Island: Riptide, Far Cry 3: Blood Dragon, Grid 2, Resident Evil 6 and The Walking Dead: Survival Instinct.
The GeForce 320.14 Beta Drivers are available for download from Nvidia's GeForce website for 32-bit and 64-bit versions of Windows Vista, 7 and 8.