i bought a Coolermaster Hyper N520 a while back for my e5200. i sold the pc and kept the cooler. Now got myself a Deepcool Iceedge 400 just because of the i5 compatibility. i wanted to know if it was worth getting the Retention bracket for the coolermaster so that i can use on my i5??? (maybe i should just sell it) Its going to cost about $20 !!!!! I'll be doing some OC afterwards (4ghz maybe ). which one would be the most efficient??