OCing does not require water, something like the 212 Hyper EVO is considered one of the best coolers on the market, I've had my 2500K at 4.8 24/7 for a few years now, and my 3570K at 4.7 24/7 with no ill effects, or to go back, there are may Q6600s (native 2.4GHz) running 3, 3.6 and 4+ GHs that have been around for many years