IBM System x3500 M4 Product Manual

Also see for System x3500 M4: Installation and user guide Product guide

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IBM System x3500 M4 Product Manual Manual pdf 10 page image

IBM System x3500 M4 10Memory optionsThe IBM System x3500 M4 supports DDR3 memory. The server supports up to 12 DIMMs when oneprocessor is installed and up to 24 DIMMs when two processors are installed. Each processor has fourmemory channels, and there are three DIMMs per channel. The following rules apply when selecting thememory configuration:The server supports UDIMMs, RDIMMs, and LRDIMMs.zMixing different types of memory (UDIMMs, RDIMMs, and LRDIMMs) is not supported.zMixing 1.5 V and 1.35 V DIMMs in the same server is supported. In such a case all DIMMs operate atz1.5 V.The maximum number of ranks per channel is eight (with the exception of Load Reduced DIMMs,zwhere more than eight ranks are supported because one quad-rank LRDIMM provides the sameelectrical load on a memory bus as a single-rank RDIMM).The maximum quantity of DIMMs that can be installed in a server depends on the number of CPUs,zDIMM type, rank, and operating voltage, as shown in the "Max. qty supported" row in Table 4.All DIMMs in the server operate at the same speed, which is determined as the lowest value of:zMemory speed supported by specific CPUzLowest maximum operating speed for the selected memory configuration that depends on ratedzspeed, operating voltage, and quantity of DIMMs per channel, as shown in the "Max. operatingspeed" section in Table 4Table 4. Maximum memory speedsDIMM typeDIMM specificationUDIMM RDIMM LRDIMMRank Dual rank Single rank Dual rank Quad rank Quad rankRated speed 1333 MHz 1333 MHz 1333 MHz 1600 MHz 1066 MHz 1333 MHzRated voltage 1.35 V 1.35 V 1.35 V 1.5 V 1.35 V 1.35 VOperating voltage 1.35 V 1.5 V 1.35 V 1.5 V 1.35 V 1.5 V 1.5 V 1.35 V 1.5 V 1.35 V 1.5 VMax. qtysupported*16 16 16 24 16 24 24 16 16 24 24Max. DIMMcapacity2 GB 2 GB 4 GB 4 GB 16 GB 16 GB 4 GB 16 GB 16 GB 32 GB 32 GBMax. memorycapacity32 GB 32 GB 64 GB 96 GB 256GB 384GB 96GB 256GB 256GB 768GB 768GBMax. operatingspeed______ ______ ______ ______ _______ _______ _______ _______ _______ _______ _______1 DIMM perchannel1333MHz1333MHz1333MHz1333MHz1333MHz1333MHz1600MHz800MHz1066MHz1333MHz1333MHz2 DIMMs perchannel1066MHz1333MHz1333MHz1333MHz1333MHz1333MHz1600MHz800MHz800MHz1066MHz1333MHz3 DIMMs perchannelNS** NS** NS** 1066MHzNS** 1066MHz1066MHzNS** NS** 1066MHz1066MHz* The maximum quantity supported is shown for two processors installed. When one processor installed the maximumquantity supported is a half of that shown.** NS = Not supported.