Doom 3 graphical problems - BFG 6800 GT OC - Pics included.

[blindrocket]

Using the rig in my sig, I am playing at 1600x1200x32 @ High w/ 2Qx AA (looks like 4x AA) and it runs grrrreat!
EXCEPT, I started getting these black spots and lines in the flashlight light, and then it locked up my computer once last night. I assume that my overclocked like a bitch 6800 GT in my Shuttle case overheated... right now it's at 420/1100. I'm using the latest nVidia drivers (61.77) so that shouldn't be the case. Any ideas on what I should do? Do you think lowering the clock speed would do the trick? Or is it a memory problem?
If it is memory, do you think that ramsinks would possibly solve it?
I'm using a Vantec Tornado as my ICE exhaust fan in my Shuttle, and it keeps the ambient temps pretty low I think. Right now at idle, my temps are: GPU-60c / Ambient-37c.

EDIT: I forgot to mention that the nVidia drivers overclock autodetect feature said my optimal clock was 421/1100, so that's what I have it set on.

Thanks for looking!

Notice the objects in the flashlight light.

No problems with this shot.

This is the same shot, only with problems.

 

[Madluke]

try running at default clock speed, you'll see if this is a overclock problem. If so, then up your clock until you see the default again...

 

[The Batman]

It's probabley your OC. My OC is 430/1150 for every game except Doom3. It artifcats at those speeds. So I settled for 400/1100 and now it runs fine.

My max detected frequancies were 428/1150.

 

[blindrocket]

Thanks for the replies!

I'll try running it at 400/1100 just for Doom 3. Picky thing, isn't it?

 

[blindrocket]

Running at 400/1100 seemed to have cured the problem. Thanks!
I might try upping the clock a bit, just to see what I can get away with, but at this speed I'm having no problems running it at the high settings I have it on, which is great. (At least as early on in the game as I am, I just encountered the spiders)