2 x Powercolor Radeon 7970 mounted in a CoolerMaster HAF 925 case with extra 120mm fans inside. 2 for push-pull CPU radiator and 2 blowing on the video card stack from the side. Don't know if an Accelero cooler would perform a great deal better, since the stock ones seem pretty well designed. I may remount the stock ones though. I work at a precision optical manufacturing company and I can use the lapping wheel to grind flat the contact surface to within microns. Could even polish it to within a quarter of a red photon, but I think that would be waste of time, as the thermal paste layer is never close to that thin, and the mirror surface might actually do a good job of reflecting thermal infrared back at the chip. Does anyone here have any experience with diluting silicone based heatsink compound with silicone lubricant or other liquid to reduce viscosity and drastically thin-out the layer? I once did this with GPU heatsink on my Nvidia GTX 570. I got it so well contacted, that you could lift and swing the thing from the bond with no movement. Unfortunately, I forgot to reinstall the aluminum mounting frame before the heatsink, so I had to take it back apart, and the next time around I didn't dilute the compound. So no results to compare.