AMD Stock fans suck!, I just replaced the stock fan on my 2100+ with a zalman 3000+. My idle CPU temperature ( no joke ) went from 55C to 34C. Not mentioning the noise difference. I can compute in silence.
Why does amd make these god awful fans, and then force you to use them to keep your warranty? My guess, cause they know your chip is going to burn out shortly after the warrranty period expires and your going to have to buy another one. With the thunderbirds, you had to buy a $40-$50 fan to keep them going for any length of time, even then I know a lot of people who had theirs burn out after 18mths.
Next PC I'm going P4