I tried this out last night. I went with default voltage on everything and tried out how far I could get. http://valid.canardpc.com/cache/banner/1057491.png
3.5Ghz on default voltage, and 35C idle and 42C full bore with a TRUE-120. it would probably idle at around 40-44C in idle and get up to around 55C with the retail cooler. those are tolerable temps.