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DRAM memory module installation order

This section contains information of how to install DRAM memory modules properly.

DRAM memory module installation order includes independent memory mode and memory mirroring mode.
  • Independent memory mode
    Independent memory mode provides high performance memory capability. The memory channels can be populated with memory module in any order in independent mode. You can populate all eight channels on each processor in any order with no matching requirements. Individual channels can run at different memory module timings, but all channels must run at the same interface frequency.
  • Memory mirroring mode
    Memory-mirroring mode provides full memory redundancy while reducing the total system memory capacity in half. Memory channels are grouped in pairs with each channel receiving the same data. If a failure occurs, the memory controller switches from the memory modules on the primary channel to the memory modules on the backup channel. The memory module installation order for memory mirroring varies based on the number of processors and memory modules installed in the server.