I installed a swiftech komodo full coverage waterblock on my 5870 today and was quite careful to do it properly. I added it to my Boreas 12 loop and turned the computer on and nothing came up on-screen. I tried another GPU and it all worked so I knew the GPU was the issue.
When installing the waterblock I was concerned about the re-use of the GPU back pressure plate bracket thingy- Swiftech supplied longer screws to use when you stuck the thing back on. The problem is that the pressure plate touched components on the back o fthe pcb. To keep this from shorting teh card, there is a plastic film on back of the metal pressure plate but I was dubious about the protection it offered.
So with the pressure plate as the prime suspect, I removed it an restarted- still no boot, but at least a signal came through to the monitor for a few seconds before disappearing again. That would suggest to me that it was the backplate that fried the card- does this make sense?
I'm so sick of fried cards- I've got two fried 260s sitting here in front of me, and now a 5870
