Dynatron G618 2u Passive CPU Cooler for Intel Socket 1366 Model: G618. CPU Application: Socket 1366 Support Intel Xeon 5600 Series Westmere Processor X5680, X5677, X5670, X5667, X5660, X5650, E5645, E5640, E5630, E5620, L5640, L5638, L5630, L5618, L5609 & 5500 Series Nehalem EP Processor W5580, X5570, X5560, X5550, E5540, E5530, E5520, E5506, E5504, E5502, L5520, L5506, L5518, L5508. Solution: 2U. Heat Sink Material: Aluminum Stacked Fin with Heat Pipes and Copper Base. Dimensions: 90.0 x 90.0 x 64.0 mm. Weight: 490.0 g. RoHS Compliant. Backplate is not included.