Dynatron T667 60mm 2 Ball CPU Cooler Type: Fan & Heatsinks RPM: 4500 RPM Air Flow: 25.8 CFM Noise Level: 18~35 dBA Power Connector: Pin1-Black (-) Pin2-Yellow (+) Pin3-Green (Techometer/Signal output) Pin4-Blue (PWM) Heatsink Material: Copper Base & Aluminum Fins with Heatpipes embedded Compatibility: Intel Xeon 5500 Series Nehalem EP Processor Socket LGA 1366 processor X5570, X5560, X5550, E5540, E5530, E5520, E5506, E5504, E5502, L5520, L5506 for 2U Server & Up Fan Dimensions: 60 x 60 x 25 mm