ARCTIC Freezer i11 - Silent 150 Watt CPU Cooler for Intel Sockets 1150/1155 / 1156/2011 with improved 92 mm PWM Fan - Easy Installation - Professional MX4 Thermal Compound included IMPROVED & EASY TO INSTALL: The Freezer i11 has been improved in airflow, cooling performance, noise level and transport-proofness. The Freezer i11 is just a few minutes away from being installed AIRFLOW REINVENTED: Fluidic analysis and long testing hours during engineering is leading to greater airflow and cooling at lower noise level; which mutilates the stock cooler performance COMPATIBILITY: The CPU Tower-Cooler mounting system is compatible with Intel Sockets 1150/1151/1155/1156/2011*, 2011-3*, 2066* (*Square ILM) SILENT: PWM control and efficient cooling allow a very low fan speed and thus a silent cooler without an overheating CPU. Rubber spacers between fan and heatsink eliminate rattle or vibration sound TRANSPORT-PROOF: Incorporating a functional, secure backplate to the installation allows this cooler to be one of the safest - the Freezer i11 will always be safely attached to your CPU