I'm thinking about overclocking my rig with stock voltages right now because I want to read more into it before I get all nitty gritty. It looks as though most people advise one to not overclock the i5 2500k w/o getting an aftermarket cooler. Right now my rig is running the i5 2500k, msi p67a gd65, 16gb corsair 1600mhz ram, 2x powercolor 6870's 1300w psu. I checked to see if it would fit and it will. Is there anyway to put a third fan on it, it says on the thermalright website you can, I just haven't seen it though. If you even can is it even worth it as the performance gains may be negligible.