I bought a used motherboard which included a big cpu heatsink(without a fan). I am wondering if it would be best to just attach and try to tie a fan to it or get a new coolermaster 212. It's for a 4470k on an Asrock z97 board. I won't OC yet but I definitely plan on overclocking at least to 4.2 or around that. Would that be enough cooling? The heatsink that came with it is around the same size of a coolermaster 212 or bigger. I would try just to tie any good kind of fan to the heatsink.