yeah, i know its a bracket. what we, or at least i, are/am talking about when i say "pins" are the four corners of that bracket that hold it tightly to the motherboard by attaching in the rear to another support bracket. it shows four little screws in the picture in above link...and i was under the impression that it was held on by little plastic retention clips that push through the bracket and secure it to the motherboard. so, if it doesnt have said plastic retention clips, i would be talking about the four screws. ie are they tightened down completely? if they are not, then the hsf is not making good contact with your cpu. that make sense?