As the Heise-Newsticker reported that NVidia has today withdrawn the recently released version of the GeForce 196.75 drivers for NVidia graphics cards from the 6000 generation. Apparently it comes with this release to problems with the fan controller, which can in certain circumstances lead to overheating of the card. In the worst case this can lead to damage or even total failure.

In parallel, also reports Blizzard to speak, and notes that had occurred with this driver in the games Warcraft 3, World of Warcraft and StarCraft 2 Beta In many cases, unusually low refresh rates. The emfpehlen here is to switch to an older driver.
In his forum Meanwhile Nvidia has announced to publish shortly a new driver that fixes the problem.