I have an A7V8X with an XP1600 chip and my stock CPU temp was running about 43C at idle and 50C under load. I cut a blowhole in the top of the case with an 80mm fan blowing out and the case temp dropped 20 degrees F. The cpu temps dropped about 8 - 10 degrees F. Since then, I have installed an Alpha 8045 heatsink, (one of them big suckers that bolts to the MB,) and a Tornado fan, and now under load I can barely reach a cpu temp of 38C. This is just a reference for you. I have got the impression that the newer XP chips run a little cooler than the older 1600-1800 chips but I'm not positive on that. What type of heatsink and fan are you running?