I just recently installed an Intel Core 2 Duo E8400 onto my machine, and according to RealTemp, while idling, there was a max temp read at 51 degrees C. I opened the side panel up and saw both PSU and CPU fans running. Upon installation, I did not apply any thermal compound to the CPU (some was already applied to heatsink as you know).
What should I do? Should I obtain thermal compound for it to be safe? I think my old processor would idle between 30-40 degrees C.