Installing System Components 117Installing Memory ModulesCAUTION: Only trained service technicians are authorized to remove the systemcover and access any of the components inside the system. See your ProductInformation Guide for complete information about safety precautions, workinginside the computer, and protecting against electrostatic discharge.1 Turn off the system, including any attached peripherals, and disconnectthe system from the electrical outlet.2 Open the system. See "Opening the System" on page 71.3 Remove the memory cooling shroud. See "Removing the Memory ModuleCooling Shrouds" on page 94.NOTICE: Never remove the memory cooling shroud without first powering downthe system. Overheating of the system can develop quickly resulting in a shutdownof the system and the loss of data.4 Locate the memory module sockets on the system board. See Figure 6-2.CAUTION: The DIMMs are hot to the touch for some time after the system hasbeen powered down. Allow time for the DIMMs to cool before handling them.Handle the DIMMs by the card edges and avoid touching the DIMM components.5 Press the ejectors on the memory module socket down and out, as shownin Figure 3-25, to allow the memory module to be inserted into the socket.Table 3-2. Memory Sparing ConfigurationsDIMMs AvailableMemorySparedMemoryA1, A2, B1, B2 A3, A4, B3, B4 A5, A6, B5, B6 A7, A8, B7, B8512 MB 512 MB 512 MB 512 MB 6 GB 2 GB1 GB 1 GB 1 GB 1 GB 12 GB 4 GB2 GB 2 GB 2 GB 2 GB 28 GB 4 GB4 GB 4 GB 4 GB 4 GB 56 GB 8 GB8 GB 8 GB 8 GB 8 GB 112 GB 16 GBIndicates a spared single-rank DIMM (512-MB or 1-GB). The entire capacity of thisDIMM is reserved for sparing.Indicates a spared dual-rank DIMM (2-GB and higher). One-half of this DIMM’scapacity is reserved for sparing.
