Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
I forgot to add that the cpu oc is 24hr prime stable (2 instances), and the video card shows no hiccups or artifacting while playing quake 4 for multiple hours (max temp is 61C).
1) What OS are you using?
2) What service packs have you installed?
3) Are you using the X2 driver?
4) If running XP, did you get the dual-core hotfix?
5) If you got the hotfix, did you enable it with the registry key?
6) Are you using "Cool and Quiet" <== if overclocking, do not use. Set bios to disable, and power scheme to "Home/Office Desk"
Why the questions...
XP and 2000 don't have native support for dual core processors (real X2 and P-D or pretend Hyperthreading) so there can be some "perfomance issues". This appeared mostly in games (as they are the applications that really stress the entire system), and some benchmarks. Dual-CPU systems are not affected (unless dual dual-core) as they are differenct physically.
Look at Roliath's post. A lot of nForce3 users had/have issues with 6800 series cards.
Try the fast-writes suggestion - and/or - try the new forceware 5.11 drivers. I've seen posts on some forums where users have indicated that these drivers have cleared up the problems. Of course, this seems weird as 5.11 is the same as 5.10 only with new ethernet components.