I have an athlon4 1.4 Ghz here with a thunderbird core, boy it runs hot. about 50 degrees at idle, and that goes up to about 58 to 60 degrees under heavy load!
id be worried about that my old ahlon 1.2 never got that hot and my ahlon xp2400 does not get above 32 at idle.I use a thermaltake heatsink and a cheap 3000rpm fan due to something i should not have done ill get a proper fan later old one could be adjusted up to 5000 something rpm. :-)