i was looking this for mine. a few guys have said to make sure it is screwed all the way in. even the slightest gap can make a difference

I didn't notice much difference in idle temps between the H50/Titan Fenrir, however under load the h50 excelled. Got my Q6700 clocked to 3.6ghz and 1.48V and doesn't exceed 68c even after 30 rounds of IBT. With the Titan Fenrir it was hitting just under 80c under the same conditions.