I have XP SP3 loaded, but I believe the problem was there with SP2 as well. Even tried with Windows Vista.

Basically I have ACPI 2.0 enabled, S3, installed WINXP. When I try to resume from Sleep mode, the machine never comes out. I can hear my 8800GTS fan blowing full speed like it's stuck.

I'd try another video card but I dont have one available. Has anyone successfully gotten their computer to resume from (S3) Sleep mode? If so what are your settings in BIOS?