IBM HS21 User Guide - Page 37

10. To install the DIMMs, repeat the following steps for each DIMM that you install: a. Turn the DIMM so that the DIMM keys align correctly with the connector on the system board. Attention: To avoid breaking the retaining clips or damaging the DIMM connectors, handle the clips gently. b. Make sure that the small tabs on the retaining clips are in the notches on the DIMM. If there is a gap between the DIMM and the retaining clips, the DIMM has not been correctly installed. Press the DIMM firmly into the connector, and then press the retaining clips toward the DIMM until the tabs are fully seated. When the DIMM is correctly installed, the retaining clips are parallel to the sides of the DIMM. Important: If there is a gap between the DIMM and the retaining clips, the DIMM has not been correctly installed. In this case, open the retaining clips and remove the DIMM; then, reinsert the DIMM. 11. Replace the DIMM air baffle, if one was removed from the blade server in order to install DIMMs. If you have other options to install or remove, do so now; otherwise, go to "Completing the installation" on page 34. If memory is installed in the Memory and I/O Expansion Blade, you can configure it to provide memory mirroring by using the Configuration/Setup Utility program. See Advanced Setup → Memory Settings under "Configuration/Setup Utility menu choices" on page 40 for more information. Installing an additional microprocessor The following notes describe the type of microprocessor that the server supports and other information that you must consider when installing a microprocessor: v You cannot remove the single microprocessor and replace it with a different type of microprocessor of greater or lesser speed. v If you install a second microprocessor, you must install the same microprocessor type and speed as the first microprocessor. v Some models support dual-core processors and quad-core processors. Do not mix dual-core processors and quad-core processors in the same system. Install all dual-core or all quad-core processors in the server. v Always install microprocessors that have the same cache size and type, the same clock speed, and identical internal and external clock frequencies (including system bus speed). v Make sure that the microprocessor with the lowest feature set is the startup (bootstrap) microprocessor, which is installed in the microprocessor 1 socket (U6). v For a list of microprocessors that the blade server supports, seehttp://www.ibm.com/servers/eserver/serverproven/compat/us/. v Before installing a new microprocessor, download and install the most current level of BIOS code from http://www.ibm.com/systems/support/. v The microprocessors terminate themselves; therefore, no terminator card is required if microprocessor socket 2 (U7) is empty. However, for proper airflow, this socket must contain a microprocessor heat-sink filler, sometimes called a microprocessor baffle. v The microprocessor speeds are automatically set for this server; therefore, you do not have to set any microprocessor frequency-selection jumpers or switches. Chapter 3. Installing options 25