Copper Heatsink K129 for Intel Xeon3400 1U LGA1156 Lynnfield Retail Brand: Dynatron; Model: K129; Type: Heatsinks only; Compatibility: Intel LGA 1156; Heatsink Material: Copper; Heatsink Dimensions: 90.0 x 90.0 x 26.5 mm; Weight: 490g ? 5g; Features: CPU Support: Intel Core i5 I5-750; Xeon Processor 3400 Series; Core i7 Processors, I7-870 & I7-860.