CPU Water Cooling is better because air can carry away the heat of the unit and the more airflow you need for a heart sink. What happens is that when the decrease return begins to set in a fair pace once you are at the pint of Alpha heartsink. The heat moves passed this areas and will come up against spread resistance. You may see copper bases in some heart sinks and the reason is copper is better to spread heat over the surface than aluminum would but only up to a certain point.

To have CPU Water Cooling you will need a radiator, fan , pump and a heat exchanger. The bigger the radiator the easier it is to cool the CPU, then the water flow will be higher and the surface over time will be cooler. You can get these kits online for about $100. If you want the parts on your own they may be more expensive. You can get the kit and the water block which is very important to the entire system can be found at these places Aquastealth, Cool Chip, Overclocker’s Hideout and Senfu.