AMD K8-939 3000+ is burn proof[ SEE TEXT BELLOW, ]and if you don't play game[OR 100% CPU] all the time, I will try to undevolt to 5V, see the fan can do it and temperature change, noise almost sure will be gone.
SOME RISK THERE.
MY Athlon XP-M 2500+ 5v fan=2100 rpm[from 5300], 2G 100% usage, temp 50C