Dell PowerEdge R940 EMC Installation and Service Manual - Page 101

Figure 58. Memory socket location on the processor expansion module Memory channels are organized as follows: Table 44. Memory channels Proce Channel 0 ssor Channel 1 Proces Slots A1 and A7 sor 1 Slots A2 and A8 Proces Slots B1 and B7 sor 2 Slots B2 and B8 Proces Slots C1 and C7 sor 3 Slots C2 and C8 Proces Slots D1 and D7 sor 4 Slots D2 and D8 Channel 2 Slots A3 and A9 Slots B3 and B9 Slots C3 and C9 Slots D3 and D9 Channel 3 Channel 4 Slots A4 and A10 Slots A5 and A11 Slots B4 and B10 Slots B5 and B11 Slots C4 and C10 Slots C5 and C11 Slots D4 and D10 Slots D5 and D11 Channel 5 Slots A6 and A12 Slots B6 and B12 Slots C6 and C12 Slots D6 and D12 General memory module installation guidelines To ensure optimal performance of your system, observe the following general guidelines when configuring your system memory. If your system's memory configurations fail to observe these guidelines, your system might not boot, stop responding during memory configuration, or operate with reduced memory. The memory bus may operate at frequency can be 2933 MT/s, 2666 MT/s, 2400 MT/s, or 2133 MT/s depending on the following factors: • System profile selected (for example, Performance Optimized, or Custom [can be run at high speed or lower]) • Maximum supported DIMM speed of the processors. For memory frequency of 2933 MT/s, one DIMM per channel is supported. • Maximum supported DIMM speed of the processors. • Maximum supported speed of the DIMMs NOTE: MT/s indicates DIMM speed in MegaTransfers per second. The system supports Flexible Memory Configuration, enabling the system to be configured and run in any valid chipset architectural configuration. The following are the recommended guidelines for installing memory modules: Installing and removing system components 101