For Intel® Nehalem Processor, Socket LGA 1366. 70mm x 70mm x 16mm blower with PWM function, Copper Heatsink up to TDP 140 Watts for 1U server solution.
60 x 60 x 25mm fan with PWM function, Copper Base & Aluminum Fins with Heatpipes embedded for 2U&Up server solution. For Intel® Xeon® Processor X5500 Series and X5600 Series, Socket LGA1366.