Nvidia released new GeForce 266.66 WHQL drivers that only supports the GTX 560 Ti.
http://www.nvidia.com/object/winxp-266. ... river.html
http://www.nvidia.com/object/winxp64-26 ... river.html
http://www.nvidia.com/object/win7-winvi ... river.html
http://www.nvidia.com/object/win7-winvi ... river.html