I'm a fan of the company Artic Cooling, have until now always the existing CPU cooler in my computers (for 4 times) exchanged Arctic. For voice until now always super cooling capacity, price and super quiet. They were never too fortuitous. Therefore, new computer was clear, so again Artic Cooler interesting products. Test run of my Q6600 intel (4 core) on Socket 775 board was still with boxers Intel cooler. It was to be expected of Horror. That thing was loud and Pfeifte to himself. Speed setting did not work, 3 pin plug. So just power and speed but not speed (PMW). CPU temperature 55 ° C, still went. Then salvation came as I thought. As always with Amazon quickly and safely ordered the Arctic Cooler feezer 7 thermal compound already came off Super! Mother Board was ordered out anyway, Boxer radiator was bolted to cross under the board that does not need the Arctic. Installation of the cooler just great, perfect description and pass worked well. The fan connector cable exactly Intel standard and 4 pin. So power, speed and transmission speed control, Super So all it takes. Then I turned on the computer for the first time and I was scared. The fan sped off and loud. Was there not 0.9 Son? Is that so loud? Stood silent? Looked up and speed checks. 2500 RPM at 31 ° C CPU temperature. Horny temperature but much too loud. From the BIOS and CPU temperature monitoring is activated. Lo and behold, the Arctic Cooler 7 was again what it always was. A light (inaudible) good cooler with plenty of reserves upwards. Conclusion: The fan runs at me 900-1500 RPW and keeps my CPU certainly below 50 ° C. Thanks to its enormous Kühlfläsche and also reserves the fan he is of me only recommended. 5 Star Plus. 2Dinge but you should definitely consider before buying the radiator. 1.The cooler takes to cool not as usual the air via a duct from outside the processor but must take them out of the housing itself. Housing ventilation is strongly recommended because with 40 or 45 ° C in case you can not deep cooling, the fan from the power supply is sufficient alone are insufficient in with done this a 120 fans on the side, which is also good for the graphics card. 2. For people who place high value on peace definitely need a speed control. Go in Bios or via software. In bios I mitlerweile shut it again and let it rules via software. So I also have access to all other system temperatures.