Memory installation guidelines:• Memory modules must be identical in size, speed, and technology.• DIMMs installed in memory sockets with white release tabs must be identical and similar rule appliesfor sockets with black and green release tabs. This ensures that identical DIMMs are installed inmatched pairs - for example, A1 with A2, A3 with A4, A5 with A6, and so on.Sample memory configurationsThe following tables show sample memory configurations that follow the appropriate memory guidelinesstated in this section.NOTE: 1R, 2R, and 4R in the following tables indicate single-, dual-, and quad-rank DIMMsrespectively.NOTE: When using an 86 mm wide heat sink for single processor, the memory module sockets A10and A12 are not available for population.Table 3. Memory configurations – single processorSystemCapacity (in GB) DIMM Size (inGB) Number ofDIMMs Organization andSpeed DIMM Slot Population16 4 4 1R x8, 2133 MT/s A1, A2, A3, A424 4 6 1R x8, 2133 MT/s A1, A2, A3, A4, A5, A648 4 12 1R x8, 1600 MT/s A1, A2, A3, A4, A5, A6, A7, A8, A9,A10, A11, A1248 8 6 2R x8, 2133 MT/s A1, A2, A3, A4, A5, A696 8 12 2R x8, 1600 MT/s A1, A2, A3, A4, A5, A6, A7, A8, A9,A10, A11, A1296 16 6 2R x4, 2133 MT/s A1, A2, A3, A4, A5, A6128 16 8 2R x4, 2133 MT/s A1, A2, A3, A4, A5, A6, A7, A8144 16 and 8 10 2R x4, 1600 MT/s A1, A2, A3, A4, A5, A6, A7, A8, A9,A11NOTE: 16 GB DIMMs mustbe installed in the slotsnumbered A1, A2, A3, A4, A5,A6, A7, and A8 and 8 GBDIMMs must be installed inslots A9 and A11.256 32 8 4R x4, 2133 MT/s A1, A2, A3, A4, A5, A6, A7, A8384 32 12 4R x4, 1600 MT/s A1, A2, A3, A4, A5, A6, A7, A8, A9,A10, A11, A1250
