77Installing and removing DIMM modulesThe server’s memory board supports eight DIMM slots. Each slotsupports 1 GB, 2 GB, and 4 GB DDR2-667 (PC2-5300) FBDIMM modules.The server’s maximum memory capacity is 128 GB.DIMM module configuration guidelinesObserve the following guidelines when replacing or installing DIMMmodules to the memory boards.• The system supports up to four memory boards. At least onememory board and two DIMMs must be installed for the server tofunction. Each memory board must have a minimum of twoDIMMs installed.• DIMMs must be installed in pairs. For example, DIMM slots 1 and 2,DIMM slots 3 and 4, DIMM slots 5 and 6, DIMM slots 7 and 8• DIMMs in the same memory board must be identical in size, speed,and vendor.• The system does not support mixed-sized DIMMs or DIMMs fromdifferent vendors within the same memory board.Warning! Functionality issues may be encountered if mixedmemory types are installed on the memory board.• The system does not support combination of single-rank with dual-rank memory.• Use only DDR2 FBDIMMs. Other type of DIMMs will not fit into thesocket. Attempts to force a non-DDR2 FBDIMM into a socket willdamage and/or the socket or the DIMM.• Hold DIMMs only by the edges. Do not touch the components orgold edge connectors.• Install DIMMs with gold-plated edge connectors only.Important: Follow the DIMM module “FBDIMM modulepopulation order” section on page 167 when installing andremoving DIMMs.
