I'm going to start overclocking my i5 2500k and need to know which heatsink I need to replace the stock intel heatsink. I have an MSI p67a-gd65 mobo with gskill ripjaws RAM. My case is HAF 922. My first choice was the the hyper 212 evo but I read it wouldn't clear the RAM heatsinks. So now I need to know which heatsink will have sufficient cooling for an overclock somewhere around 4ghz and be able to clear the RAM heatsinks. Any help is appreciated.