Attention: To avoid breaking the DIMM locking latches or damaging the DIMMslots, handle the latches gently.6. Ensure that the DIMM locking latches are in the open position. Insert the DIMMby pressing it straight into the slot. Make sure that the locking latches snap intothe closed position. If a gap exists between the DIMM and the latches, theDIMM has not been properly installed. In this case, open the latches, removethe DIMM, and reinsert it.7. Repeat steps 3 through 6 for each additional DIMM that you install.8. Install the memory board:a. Align the board in the guides over the connector.b. Open the memory-board locking latches and insert the memory board intothe connector. Be sure that the locking latches snap into the closed position.9. If you have other options to install or remove, do so now; otherwise, go to“Completing the installation” on page 95.Attention: When you restart the server, the system displays a message indicatingthat the memory configuration has changed.v If you installed additional memory, start the Configuration/Setup Utility programand select Save Settings.v If you just replaced a failed DIMM, you must start the Configuration/Setup Utilityprogram, select Advanced Setup, select Memory Settings, highlight theconnector or bank of connectors that you want to enable, and then selectEnable.v If the 3-3-3 beep code sounds during POST, the memory board might not be fullyseated. In some memory configurations, if the 3-3-3 beep code is followed by ablank display screen, and the Boot Fail Count feature in the Start Options of theConfiguration/Setup Utility is set to Enabled (its default setting), you must restartthe server three times to force the system BIOS to reset the memory connectoror bank of connectors from Disabled to Enabled.Microprocessor installationThe server comes with a minimum of one microprocessor installed on the systemboard and supports up to four microprocessors. With more than onemicroprocessor, the server can operate as a symmetric multiprocessing (SMP)server. With SMP, certain operating systems and application programs candistribute the processing load among the microprocessors.Before you begin:v Read the documentation that comes with the microprocessor to determine if youneed to update the server basic input/output system (BIOS) code. The mostcurrent level of BIOS code for the server is available through the World WideWeb at http://www.ibm.com/pc/support.v Obtain an SMP-capable operating system (optional). For a list of supportedoperating systems, go to http://www.ibm.com/pc/us/compat/ on the World WideWeb.Attention: To avoid damage and ensure proper server operation when you installa replacement or an additional microprocessor, use a microprocessor that has thesame cache size and type, clock speed, and internal and external clock frequenciesas the microprocessors already installed.86 Hardware Maintenance Manual: xSeries 360 Type 8686