ZALMAN CNPS 7500 AlCu LED 2 Ball CPU Cooler Type: Fan & Heatsinks RPM: 1150-2300 RPM ± 10% LED: Blue Noise Level: 17-32 dBA ± 10% Power Connector: 3 Pin Heatsink Material: Pure Copper & Pure Aluminum Compatibility: Intel: LGA 775 / 1155 / 1156 AMD: Socket 754 / 939 / 940 / AM2 / AM2+ / AM3] Note: Customers that purchased coolers before the inclusion of support for socket 1155/1156, can purchase the separately sold ZM-CS5B mounting kit for installation onto socket 1155/1156. Heatsink Dimensions: 121 x 121 x 67mm