On Newegg it looks like the 5200+'s are 65 watt... they should run fairly cool. The stock fan probably won't have too run to fast to keep the temp down. I built a rig a while back for a buddy with a 5200+ or 5400+ 65 watt (I forget which one exactly). It was very, very quiet with the stock cooler, integrated graphics, and an Antec NeoPower powersupply.