It's actually my friends setup. And he's had the setup for ~6 months. He already had a watercooling setup, so with the new one he was going to have one loop for his video card and another loop for his CPU. So when we first installed it and booted up, the CPU loop was working fine but the GPU pump wasn't working. So there was no cooling on his 7800 besides a waterblock with no water in it and ramsinks. We got into Windows and his CPU was a toasty 16* and his GPU was around 70*. Which is fine for the 7800, mine went up to low 80s with stock cooling. But nonetheless we turned his computer off right after we checked temps.
So, we fixed his GPU loop and powered up and both loops were working fine. Got into Windows CPU still at around 15-18* and his GPU was sitting at 30*, everything looked fine. He started playing WoW and at first it was working fine but then randomly he got MAJOR artifacting and his computer shut off. Note, there was no lag but artifacting like crazy. Now he can't even get into Windows and even the LanParty POST artficats, lol.
We tried his card in my computer with no prevail. But he tried his dads 9250 and it works fine. So our conclusion is that he broke his $500 video card
. After the first time we booted up (when the GPU loop wasn't working) we noticed that a little bit of the fluid had leaked on to the motherboard, but nothing happened. He's using PC-ICE which is suppose to be nonconductive so I don't think that would of caused it. Also, the first time we booted up when the loop still wasn't working we forgot to plug the 6-pin power connector to the card, but we were only in Windows for about a minute, so that shouldn't have done anything.
So, we're pretty much at a loss for the cause of it as of now.