and external clock frequencies must be identical. You can use theConfiguration/Setup Utility program to determine the specific type ofmicroprocessor that is installed on the system board.v Read the documentation that comes with the microprocessor to determinewhether you must update the basic input/output system (BIOS) code in theserver. To download the most current level of BIOS code for the server,seehttp://www.ibm.com/support/.v Obtain an SMP-capable operating system. For a list of supported operatingsystems, see http://www.ibm.com/servers/eserver/serverproven/compat/us/.v You can use the Configuration/Setup Utility program to determine the specifictype of microprocessor in the server.To install a microprocessor, complete the following steps:1. Read the safety information that begins on page v and “Installation guidelines”on page 21.2. Turn off the server and peripheral devices; then, disconnect the power cordsand all external cables. Remove the cover.Attention: The microprocessor retention latch is spring-loaded when themicroprocessor is in place. Releasing the latch too quickly or allowing it tospring upward can damage the microprocessor and surrounding components.3. Remove the microprocessor air duct from the fan cage:a. Grasp the two pinch points on the top of the air duct and squeeze themtogether.b. Lift the air duct up and out of the server and set it aside.4. Release the microprocessor retention latch by pressing down on the end,moving it to the side, and slowly releasing it to the open (up) position.Microprocessorrelease lever(fully open)Microprocessorbracket frame5. Open the microprocessor bracket frame by lifting up the tab on the top edge.Attention: Use the vacuum tool that comes with the replacement part toinstall or remove the microprocessor. Dropping the microprocessor duringremoval or installation can damage the contacts. Also, contaminants on themicroprocessor contacts, such as oil from your skin, can cause connectionfailures between the contacts and the socket.6. Install the microprocessor by using the vacuum tool and completing thefollowing steps.40 IBM System x3500 Type 7977: User’s Guide