Raedius: I have a GF2 GTS 32 DDR and it's working nicely. It's "not qualified" either. I think they're not even testing these "gamer" cards... With nVidia cards you might want to try couple of different detonator driver versions. Not all of them are good. Personally I use a rather old and stable version (can't remember the version, maybe 23.xx). Newer versions wouldn't add any more features or speed for me...

Btw, is there a fan on your gf3? If yes, have you checked it's ok? I was just thinking if it's an overheating problem...

P.S. Forget about virtual memory. It's not good for anything else than testing you patience Physical mem is the only way to fly...