Racing cooler that turns the i7 4970k 4.9 ghz.en automatic OC (ASUS) It comes with 2 fans 14cm: for the center one ok .. but on the other must be high because of the memories;! despite a box that accepts coolers 17cm it does not pass: so I replaced the fan 14 by 12cm which fits smoothly! The first PCI port is condemned; Noctua has released an asymmetric NH-D15S which remedies this problem: too late for me!