This is what it looks like when a Koolance video water block fails and leaks onto a ATI Theater 550pro TVtuner. I believe it is a problem with the design of the block. It was running for over a 2 years with no problems. I think the plastic cracked because of heat stress. The CPU block looks fine but I do not trust Koolance water blocks anymore. The computer was running with the leak for a week or more before it failed on reboot. I cleaned everything with deionized water and remounted the OEM fan on the 6800gs. All parts survived and are still working 6 months after the leak.