About this taskAttention:v Be extremely careful, the microprocessor socket contacts are very fragile.v Do not allow the thermal grease on the microprocessor and heat sink to come incontact with anything. Contact with any surface can compromise the thermalgrease and the microprocessor socket.v Do not touch the microprocessor contacts. Contaminants on the microprocessorcontacts, such as oil from your skin, can cause connection failures between thecontacts and the socket.v Use the microprocessor installation tool that came with the new microprocessorto remove and install the microprocessor.v Be sure to only install microprocessors that have the same speed, number ofcores, and frequency.v Each microprocessor socket must always contain either a socket cover or amicroprocessor and heat sink.v Be sure to use only the microprocessor installation tool provided with the newmicroprocessor to remove or install the microprocessor. Do not use other tools.v The microprocessor installation tool has the microprocessor installed on the tool,and might have a protective cover over the microprocessor. Do not use the toolor remove the cover from the microprocessor until you are instructed to do so.To remove a microprocessor and heat sink, complete the following steps:Procedure1. Read the safety information and installation guidelines, see “Safety” on pagevii and “Installation guidelines” on page 45.2. Turn off the server (see “Turning off the server” on page 41) and all attachedperipheral devices. Disconnect all power cords; then, disconnect all externalcables as necessary to replace the device.3. Remove the DDR3 compute book from the server.4. Remove the DDR3 compute book cover (see “Removing the DDR3 computebook cover” on page 218).5. Remove the heat sinks:a. Use a screwdriver to loosen the captive screw on one side of the heat sinkto break the seal with the microprocessor.b. Loosen all the captive screws on the heat sink, rotating each screw one fullturn until each screw is loose.Heatsinkc. Gently lift the heat sink from the microprocessor.276 System x3850 X6 and x3950 X6 Types 3837 and 3839: Installation and Service Guide
