Download smcFanControl 2.0
Run the fan speeds at 1500/2500/2000 still quiet, power supply runs around 42C .
EDIT.
Double checking your image, I notice your fans are screaming right now, wonder why it's so hot running that fast. My stock fans are 700/1200/1200 PSU gets to 79-80C at that, but running 1500/2500/2000 gets at most 50C.