Im using bitfenix shadow case,and find a cpu cooler that can be fit on the back side of the case,because got 2 hole for cooler tube at the back case,im using fx 6300,and want to overclock my cpu to 4.1ghz maintain without boost,i know i can go more with other cpu cooler ,actually im trying to use that hole as good as possible,and want my case look nicely,hahaahhaha