I have: E8400 NZXT 921 Guardian Case(Mid tower) UD3R Motherboard I plan to overclock the cpu to about 3.8GHZ as long as it is stable. I need a relatively cheap hsf for it. I do not know if they push pins are that good, because don't they after few removals of the heatsink become loose? I guess I want a bracket for the hsf also. Recommend me a good bracket and hsf.