The X8440 Server Module 2-socket CPU configuration ships with two CPUs. To upgrade to a 4-socket CPU configuration you must perform these steps:
Step 1: Remove baffles from SKT0 and SKT1, and remove the HyperTransport Termination Adapter from SKT0. For more information, see Remove Baffles and HyperTransport Termination Adapter From X8440 Server Module.
Step 2: Add CPUs and heatsinks to SKT0 and SKT1. For additional information, see Add CPUs and Heatsinks to X8440 Server Module.