Are you using Artic silver or another thermal paste? If not there is your problem! Also, are you overclocking at all, and if your not overclocking, can you make sure the CPU VCore voltage setting is on Auto? But remeber that abit mobos do report the temp higher than it is, but usually only by 10C at the most. Even then 60C is too high, my o/ced P4 2.6C @ 3.12GHz is 45C full load with stock HSF and stock voltage, but with artic silver 5. That stuff lowered my temps 8C full load and 3C idle (from stock thermal pad)!
-Josh