After my AIO thermaltake CPU water cooler died on me, I swapped it out for the stock fan that came with my i7 4770k processor. Of course I cleaned off the old thermal paste and added new thermal paste. Temperatures seem to be decent so far for air cooling, usually around 35-40C... But ever since I had that initial overheating issue after the water cooling unit died, I've been extremely cautious and aware of my cpu temperatures unlike ever before. Now I am noticing the temperature will randomly spike up to 75C for a few seconds then back down to 40ish immediately. Is this normal or should I be concerned? I'm using Core Temp to monitor which I hear isn't all that accurate, but I've also been checking regularly with HWInfo which has also been reporting the same temperatures in the min, max, and avg columns.