BFG 6600GT OC artifacts

[labonn]

Somehow, a little furry feline friend caused a reboot while I was running a game. Now all (& only) 3D games exhibit artifacts.

The artifacts appear as a pattern of small (20x5 pixels maybe?) areas that are visible only while panning.
Upon close observation, I can see that these areas are unable to be updated consistantly with the rest of the display.

I've reinstalled the same drivers, and tried different drivers-no luck.
Changing the anti-aliasing from app-controlled to high specified values creates more, but
smaller, artifacts. No other settings have an effect.

Any suggestions will be appreciated!

PSU: Antec NeoPower 480W Dual 12V Rail: 18 & 15A
CPU: AMD Athlon 64 FX-55 2.61 GHz
GPU: BFG 6600GT OC PCI-E
Drivers tried: 6693,7184,7189 & 7641.
MBD: ABIT AN8 Fatal1ty
Chipset: NVIDIA nForce4
BIOS: Phoenix Technologies, LTD 6.00 PG, 2/1/2005
MEM: 2GB Corsair 2225
HDD: (4) Samsung 120GB SATA; RAID 0+1
(1) Samsung 120GB PATA; Hot Spare
(1) WD Raptor 74GB SATA Removable Hard Drive
OPTD: (2) Plextor 716SA SATA DVD/CDROM Burners
FPPY: Mitsumi 1.4MB
CASE: SilverStone TJ-06
COOL: Koolance EROS: CPU, Chipset, GPU
NTWK: Belkin Pre-N Wireless
OS: Win MCE 2005
PCI: Promise Tech. SATAII150 TX4 Controller

 

[theMan]

temps?

 

[labonn]

Finally! ISP was down all weekend!
OK-Temps are 40-46C while running the game, as reported by nVidia drivers. Artifacts are there upon cold (really cold) boot anyway.
Some one suggested "underclocking" it. Well, if I can figure out how, I may give that a try, but not sure what it will mean if it does eliminate the artifacts-card still won't be working right...
BFG support doesn't have a clue, but they do have a "lifetime" warrenty. Hope they mean my lifetime and not the cards ;-)
Thanks