Got it, installed it with the supplied paste and kapow! No shit - 17 degrees cooler (previously it hovered around 40C) than with the stock fan on idle and even cooler on full-out load (like 20C cooler). What a f*ckfest the stock HSF is on the new Core i# CPUs! Even without using a 3rd party thermal compound. And I had the feeling that I installed it wrong, cause it's a freakin' bit*h to get it fit into the clipping system of the LGA1156 socket - so imagine what if I used a AS5 paste and installed it dead on. It would cool down while playing games :D (that's a overstatement, of course, I mean, I am so surprised by the difference)