I have an Annihilator 2 GTS, and it has some weird problem where if the power is disconnected from the power supply (either because I have to move the computer, clean it, upgrade it, or the power goes out) when I power it back on there's no video. I have to turn it on once, then wait a few seconds, turn it off, then turn it on a second time for the card to work properly.
Anyway, I got on m3dzone.com the other day and got the latest reference bios from nvidia, 3.x something, and the problem is solved. I just used the nvflash.exe. I did get a warning that something didn't match up, but I did it anyway (sounded like a warning just because I was going from factory bios to reference). Everything works great.