Koolance EX2-755 Computer Liquid Cooling System, Rev1.3 EX2-755 is an ambient liquid cooling system designed with features for computer cooling. This model contains a dual x 120mm fan aluminum radiator, providing roughly 590W of cooling with a 25&deg;C ambient delta.&nbsp;Just add tubing, fittings, coolant, and connect to your cold plate(s). Cooling capacity: 590W (2013BTU/hr) with 25&deg;C liquid-ambient delta @ 4LPM. Radiator fan speed: automatic based on temperature, or 10 manual levels. Pump: 10 manual speed levels, up to 4LPM (1GPM).