So, I recently built a PC. (My third) and I've noticed that my 1st core is running a good 9C hotter than my 4th core. I have a i5 4460. I got up to 70C and these temperatures are unusual. I built a computer for my brother and his runs under 60C playing BF4. This is pretty frustrating and I'm having a hard time understanding. I reapplied the thermal paste twice.