Dell External OEMR R410 Owners Manual - Page 121

Memory Mirroring Support The system supports memory mirroring if identical memory modules are installed in the two channels closest to the processor (memory should not be installed in the farthest channel). Mirroring must be enabled in the System Setup program. In a mirrored configuration, the total available system memory is one-half of the total installed physical memory. Optimizer (Independent Channel) Mode In this mode, all three channels are populated with identical memory modules. This mode permits a larger total memory capacity but does not support SDDC with x8-based memory modules. A minimal single-channel configuration of one 1-GB memory module per processor is also supported in this mode. Table 3-2 and Table 3-3 show sample memory configurations that follow the appropriate memory guidelines stated in this section. The samples show identical memory-module configurations and their the physical and available memory totals. The tables do not show mixed or quad-rank memory-module configurations, nor do they address the memory speed considerations of any configuration. Table 3-2. Sample RDIMM Single- and Dual-Rank Memory Configurations (Per Processor) Memory Mode Memory Module Size 4 Optimizer 1-GB X X Memory Sockets 123 X XX XXX X XXX Single Processor Physical Available Memory Memory (GB) (GB) 1 all 2 3 2 4 Dual Processor Physical Available Memory Memory (GB) (GB) 2 all 4 6 4 8 Installing System Components 121