3U+, Active Heatsink for Socket-771 Intel Xeon 5000 Processor series (for DP Motherboards)
Copper Base / Copper Fins with Aluminum Cover, Screw + Spring - Fan on Top
1U, Passive Heatsink for Socket-775 Intel Xeon Processor 3000 series, Core 2,
and Pentium processors - Copper and Aluminum Base / Copper Fins / Heat Pipes, Screw + Spring