My Vega 64 has an aio I modified to fit on it. Hotspot temps were very high and I was trying out different thermal pastes and after applying a lot of noctua paste as suggested the card stopped displaying out. The pc boots no problem with a 7970 I had. I reset the cmos and tried the cards stock bios. I have cleaned all the thermal paste off with alcohol and it was in between capacitors and what not. Any other suggestions? (VRM heatsinks were applied after that pic). (Edit) the fans spin and the light comes on, the monitor even turns on out of sleep but goes back to sleep immediately.