Q. My friend has just built a computer with water cooling. What is water cooling and how does it work?

HelpA. Liquid (or Water) Cooling is a cooling process used to cool the inside hardware of a computer, specifically the CPU and GPU. The liquid cooling of a CPU typically requires a water block, water pump, and a device to exchange heat for cooler air. The water block acts much like an air-cooled heatsink. However, water blocks tend to be much more efficient when cooling more powerful CPU’s that dispense greater amounts of heat, especially when they are overclocked. This is because water has a higher heat capacity; therefore it can absorb much higher temperatures, which allows for a more powerful cooling system. The process of liquid cooling typically begins with a water pump that pumps water into the water block. As the water absorbs the heat, the water is then fed to a heat exchange – normally a radiator – where a fan then blows the heat out of the computer, and the cycle starts again.