I have an AMD Athlon 1.33GHz, with a CoolerMaster fan using Arctic Silver Alumina, and im averaging about 48-50 degrees Celsius, with a 30-32 degree ambient temperature with the side panel off. Is this too hot??? The hottest its gotten was about 59 degrees when i had the case cover on and it was a very warm day. Is this too hot? What do your CPUs run at? Update: Okay, i bought a fan today for the back of my computer. I cut out the fan grille a few days ago coz it would block the air coming out. It made a HUGE difference. before where the case would be 35-39 celsius, its 28-29. the CPU temperature is 10 degrees lower with the side panel on than if it was off. I might be getting an intake sooner or later.