I have 3570k, haf x, and 212 evo. I run at 4.5 also. My idles are >20C. I put the paste on as an X with Artic silver 5. After watching some videos on youtube, you see spreading paste with a card will cause air bubbles reducing surface area of heat sink causing higher temps. prime95 max temp will be >75 and intel burn >85. but during normal use with intense games i only hit 60.