Dell PowerEdge T605 Hardware Owner's Manual (PDF) - Page 128

Table 3-1. Memory Configurations Total System Memory DIMM Socket SingleProcessor System Dual-Processor DIMM A1/ DIMM A2/ DIMM A3/ DIMM A4/ System DIMM B1 DIMM B2 DIMM B3 DIMM B4 1 GB 2 GB 512 MB 512 MB 2 GB 4 GB 512 MB 512 MB 512 MB 512 MB 2 GB 4 GB 1 GB 1 GB 4 GB 8 GB 1 GB 1 GB 1 GB 1 GB 4 GB 8 GB 2 GB 2 GB 6 GB 12 GB 2 GB 2 GB 1 GB 1 GB 8 GB 16 GB 2 GB 2 GB 2 GB 2 GB 8 GB 16 GB 4 GB 4 GB 12 GB 24 GB 4 GB 4 GB 2 GB 2 GB 16 GB 32 GB 4 GB 4 GB 4 GB 4 GB Memory Sparing Support Memory sparing is supported in single- or dual-processor systems that have one of the fully populated memory configurations shown in Table 3-1. The memory sparing feature must be enabled in the Memory Information screen of the System Setup program. See "Entering the System Setup Program" on page 43. To use memory sparing, you must disable node interleaving. Memory sparing is applied independently to the two groups of DIMMs on the same sides of the processor sockets. To support memory sparing, all DIMM sockets within a DIMM group must be populated. When enabled, memory sparing allocates and reserves ranks of memory from the installed DIMMs to act as spare memory in the event of a memory channel failure. A memory channel uses paired DIMMs; for memory sparing to work, DIMMs must be paired as spares also. Memory sparing allocates only the first rank of memory of a DIMM. For a single-rank DIMM, the entire capacity of the DIMM must be allocated for sparing along with the adjacent single-rank DIMM to spare a memory 128 Installing System Components