CEK Spring for Intel Xeon
CEK Spring for Socket 604 / LGA 771 Intel Xeon Server Board
All Intel Xeon Socket 604 / 771 heat sink solutions share a common retention base referred to as Common Enabling Kit or CEK. This was done to allow different heat sinks to all attach the same way without modification to the chassis or system board. CEK is a direct chassis attach method allowing the weight of the heat sink to transfer into the chassis back plane. This reduces stress to the system board in the event of a drop or system shock.