I'd run drivercleaner before installing that new driver, especially as your old one sounds quite corrupt. See Post 18 on Page 1 of this thread. Let me know if you find the BIOS version. GL!
. So best wishes
.


hmmm...maybe the 6600GT is the "minimum" (I mean not as old as Nick's FX or my gef4) card that works well with new drivers too. Nick, what was the other card number you tried? Some 6 series card I think. If it was a 6600 too, than forget this comment
.

but first, try a driver change
, I will search another driver for you.
] about the solution.
http://www.lfsforum.net/showthread.php?p=319337#post319337
but yes, You can use that too 

any good news?
I havn't had any more time to test it and I'll be driving less over the next few weeks as I don't have a GFC race for a while. But I will do a few hours this week and report back.