Im a little bit worried. I just overclocked my core i5 750 from stock to 3.8ghz , and my current temperatures are ; 44 , 40 , 43 , 42. Everything it stable. My pc case is cm stormstryker with 2 side fans , 2 bottom fans , one 200mm top fan and 1 back fan. I also bought a modified cpu cooler last week and its already installed in my pc.