IBM X3850 X6 Product Manual

Also see for X3850 X6: Installation and service guide Planning and implementation guide Installation instructions

Contents

IBM System x3850 X6 15Memory optionsIBM DDR3 memory is compatibility tested and tuned for optimal IBM System x® performance andthroughput. IBM memory specifications are integrated into the light path diagnostics for immediate systemperformance feedback and optimum system uptime. From a service and support standpoint, IBM memoryautomatically assumes the IBM system warranty, and IBM provides service and support worldwide.The x3850 X6 supports DDR3 memory operating at speeds up to 1600 MHz. The x3850 X6 supports up to96 DIMMs when all processors are installed, 24 DIMMs per processor. Each processor has four memorychannels that are implemented using Scalable Memory Interface generation 2 (SMI2) chips, and theserver implements three DIMMs per channel. The processor and the corresponding memory DIMM slotsare on the Compute Book.The following table lists the memory options that are available for x3850 X6.Table 4. Memory optionsPart number Feature code Description Maximumsupportedx3850 X6Modelswhere usedRDIMMs00D5024 A3QE 4GB (1x4GB, 1Rx4, 1.35V) PC3L-12800CL11 ECC DDR3 1600MHz LP RDIMM96 (24 per CPU) -00D5036 A3QH 8GB (1x8GB, 1Rx4, 1.35V) PC3L-12800CL11 ECC DDR3 1600MHz LP RDIMM96 (24 per CPU) A4x, B1x, B3x,C1x, C4x,46W0672 A3QM 16GB (1x16GB, 2Rx4, 1.35V) PC3L-12800CL11 ECC DDR3 1600MHz LP RDIMM96 (24 per CPU) A7x, A8x, A9xLRDIMMs46W0676 A3SR 32GB (1x32GB, 4Rx4, 1.35V) PC3L-12800CL11 ECC DDR3 1600MHz LP LRDIMM96 (24 per CPU) -46W0741 A451 64GB (1x64GB, 8Rx4, 1.35V) PC3-10600DDR3 1333MHz LP LRDIMM96 (24 per CPU) -The following rules apply when selecting the memory configuration:The server supports RDIMMs and LRDIMMs.Mixing different types of memory (RDIMMs and LRDIMMs) is not supported.The maximum number of ranks per one DDR3 channel is six with RDIMMs or 24 with LRDIMMs.In RAS (lockstep) mode, DIMMs must be installed in a pair.The maximum quantity of DIMMs that can be installed in the server depends on the number ofprocessors, DIMM type, rank, and operating voltage, as shown in the "Maximum qty supported" row inthe following table.All DIMMs in the server operate at the same speed, which is determined as the lowest value of one ofthe following options:Memory speed that is supported by the specific processor.oLowest of maximum operating speeds for selected memory configuration that depends on ratedospeed, operating voltage, and quantity of DIMMs per channel, as shown under "Maximumoperating speed" section in the following table.