Cooler Master E1U-NPFSS-30 Socket 478 Copper 1U Passive Heat Sink General Features: * 1U passive cooling solution Socket 478 Copper base Copper stacked fins * Supports Intel Pentium 4 Northwood/Prescott CPUs Frequencies up to 3.0 GHz * Screw and spring fasteners Unit Dimensions: 1.04 x 3.5 x 2.95-inches (H x W x D) Weight: 2 lbs.