That doesn't seem like air if CoreTemp is right. Its posting 13c (55F) which is way below normal room temp. Either they are in a really cold house or that guy is using something beyond air to cool.
 
Coretemp is never accurate, I have used it before and I came to the conclusion that as far as AMD goes "Everest" and SpeedFan are the only monitoring apps you can trust. Take a look.

Spec's :

550be at 3.6Ghz (freezer 64) LOAD :

http://i683.photobucket.com/albums/vv199/OvrClkr/coretemp-1.jpg

coretemp-1.jpg


CPU was at 32c ;)
 



What motherboard are you using? And why can't you adjust the CPU voltage?