I have 2 GTX 680's in SLI with Koolance Water blocks on them, they are reaching outragously high temps, 90C+. I've tried using thinner thermal pads and redoing my thermal paste, still no temp changes. I have a temp sensor near there and it's only reading 25c for water temp. It seems as though the card and the water block aren't making contact even though it is tightened down snugly. If I look closely I can see that there is not a gap between the thermal paste and the GPU or the thermal pads and the water block, does anyone have any suggestions on how to fix this? Thank you all very much!