See my system in my sig. We are using the same SPU heatsink, but I left the stock thermal paste on it. I have my CPU OC'd to 3.60 and am getting 100% P95 load temps of 65C, idle of 38C. Room temp for this was about 21C-22C. I have 4 case fans, two blowing air out, two in. But overall case pressure is negative, need to balance that a bit better...