Superior Cooling Perfomance A 92 mm PWM fan in combination with double-sided 6 mm copper heatpipes and a 45-fin heatsink enable the Freezer 13 CO to deliver high performance and improve heat transfer from the CPU. It excels in cooling efficiency in a Hexus comparison review with the stock cooler as well as competitors. Low Noise reezer 13 CO is one of the quietest coolers in the market, according to a test by Hexus. Thanks to the PWM control, the fan speed adjusts according to the CPU temperature and thus the noise level remains at an absolute minimum which qualifies it as a silent cooler. Multi-compatibility Freezer 13 CO features wide compatibility with AMD and Intel sockets. Its simple mounting system is designed to fit all current CPU platforms. It is compatible with AMD Sockets FM2, FM1, AM3+, AM3, AM2+, AM2, 939 and 754; Intel Sockets 1366, 1156, 1155 and 775. Continuous Operation The CO version is ideal for PCs under non-stop operation such as servers. Its Japanese dual ball bearing reduces rotational friction considerably as it is significantly less sensitive to dust and high temperature. Hence it is up to 5 times more durable than other bearings. Easy Installation The unique push-pin mounting system offers a hassle-free installation in minutes and excellent stability. Its fibre reinforced retention module is strong enough to make PCs with this cooler transportation proof. The pre-applied ARCTIC MX-4 high performance thermal compound shortens installation time further.