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Originally Posted by maxSaleen
This is a strange one. I doubt it is a short on the card. I can't think of any shorts that could be "assisted" by thermal expansion, and I've never seen a case of it (granted some chips don't behave well below zero). Could you be more specific about your setup so we can have an idea as to how everything is mounted; what you are running in your system (PSU, MB, CPU, RAM, etc) would also help in the diagnosis. In all probability it is the PSU. The addition of the pump probably hurt the 12v rail which would feed into your video card if your are running an AGP system.
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update: I swapped my video card with one from my wifes computer (9800pro) and it worked. sort of. Actually it behaved like it did before, which is why I replaced it with the 6800. 2d looks ok, games look mainly ok with some glitter, atitool shows out of this world artifacting. e.g. error of 1,000,000 in 30,000 pixels etc. I can make this go away by clocking the gpu and memory each down 100 mhz or so, but that's a little silly.
So for fun I put this back in my wifes machine and ran atitool there. no artifacts, no glitter, no nothing. So I'm starting to think it's the mobo. I got my agp slot wet a couple months ago but was very careful about getting it dry before powering on. Could be that I guess.
I thought the psu could have been a problem before, but I put in a new ocz modstream 520. probably not that.
The 12v pump is also not powered by psu. I could get the same effect by running my chiller in reverse (heating the water in my loop to 45 C) with the pump still on.
setup is:
msi k8n neo2
a64 3200+ (stable at 2.5, stock clocks while testing)
1GB geil pc4000 (stable at 270 2.5 2 5 2 1 1:1, what a find!)
evga 6800nu 128 mb
some other stuff...
Tonight I'll try putting the 6800 in my wifes machine and see if it works there. I think it will. It's now hosed in mine. Garbage on the screen even during post, bios screen, etc.
If it works there, I'll rma the mobo I guess. I wonder what that involves...