Table 9. DIMM banks and connectors (continued)Bank of DIMMs DIMM connectors3rd bank of DIMMs 17, 18, 19, 20, 21, 22, 23, and 244th bank of DIMMs 25, 26, 27, 28, 29, 30, 31, and 32v DIMMs must be installed in pairs for non-mirroring mode and in sets of four formemory-mirroring mode.v A minimum of two DIMMs must be installed in the MAX5 for each microprocessorin the host server.v The maximum operating speed of the MAX5 is determined by the slowest DIMMinstalled in the MAX5.v The MAX5 does not come with any DIMMs installed when you purchase it as aoption. When you install DIMMs, install them in the order shown in the followingtables to optimize system performance.v The server supports non-mirroring mode and memory-mirroring mode.– Non-mirroring mode. When you use the non-mirroring mode, install DIMMsas indicated in the following table:Table 10. Non-mirroring mode DIMM population sequence for the MAX5 memory expansionmodulePairs of DIMMs DIMM connector population sequencePair 1 28, 29Pair 2 9, 16Pair 3 1, 8Pair 4 20, 21Pair 5 26, 31Pair 6 11, 14Pair 7 3, 6Pair 8 18, 23Pair 9 27, 30Pair 10 10, 15Pair 11 2, 7Pair 12 19, 22Pair 13 25, 32Pair 14 12, 13Pair 15 4, 5Pair 16 17, 24Note: When you populate DIMMs in the MAX5, populate the larger capacityDIMMs first; then the smaller capacity DIMMs.– Memory-mirroring mode. When you use the mirroring mode feature,consider the following information:- Memory-mirroring mode replicates and stores data on sets of DIMMssimultaneously. If a failure occurs, the memory controller switches from theprimary set of DIMMs to the backup set of DIMMs. To enable memorymirroring through the Setup utility, select System Settings → Memory. Formore information, see “Using the Setup utility” on page 87.76 IBM System x3850 X5 and x3950 X5 Types 7145 and 7146: Installation and User’s Guide
