The Antec KÜHLER H2O 1250 provides maximum-performance liquid cooling for your CPU & delivers best-in-class performance in a quick, easy-to-install package. Unlike traditional liquid cooling systems, this self-contained unit comes prefilled & requires no maintenance. Two 120 mm voltage-controlled (PWM) fans & dual extra large pumps ensure quiet, efficient cooling, while the 240 mm radiator maximizes cooling surface area to dissipate heat from the high performance CPUs. Designed to unlock the maximum potential of your CPU, the Antec KÜHLER H2O 1250 delivers exceptional cooling when you need it the most.