CoolIT Systems' Freezone employs a water block to transfer heat from the CPU over to a polypropylene glycol mixture. The heated coolant is then pumped into a heat exchanger/chiller/reservoir that's cooled by a stack of six thermoelectric coolers. Liquid-cooling systems normally use a radiator at this leg of the journey, and they usually rely heavily on the surrounding ambient air temperature to perform effectively.

Next, a 92mm fan draws air through the heat exchanger, expelling heat out the rear exhaust port of the chassis. The coolant, which has dropped several degrees at this point, makes its way back to the (hot) cold plate to begin the process again. A thermal control module (TCM) regulates the entire cooling enterprise with sensor feedback to ensure efficiency and prevent condensation.