Dell PowerEdge T420 Owner's Manual - Page 71

General Memory Module Installation Guidelines, Memory Socket Locations

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Figure 35. Memory Socket Locations Processor 1 Processor 2 channel 0: memory sockets A1 and A4 channel 1: memory sockets A2 and A5 channel 2: memory sockets A3 and A6 channel 0: memory sockets B1 and B4 channel 1: memory sockets B2 and B5 channel 2: memory sockets B3 and B6 General Memory Module Installation Guidelines This 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 best performance: • UDIMMs and RDIMMs must not be mixed. • x4 and x8 DRAM based DIMMs can be mixed. For more information, see Mode-Specific Guidelines. • A maximum of two UDIMMs can be populated in a channel. • A maximum of two quad-rank RDIMMs can be populated in a channel. • A maximum of two single- or dual-rank RDIMMs can be populated in a channel. • One quad-rank RDIMM and one single- or dual-rank RDIMM can be populated per channel. • Populate DIMM sockets only if a processor is installed. For single-processor systems, sockets A1 to A6 are available. For dual-processor systems, sockets A1 to A6 and sockets B1 to B6 are available. 71

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Figure 35. Memory Socket Locations
Processor 1
channel 0: memory sockets A1 and A4
channel 1: memory sockets A2 and A5
channel 2: memory sockets A3 and A6
Processor 2
channel 0: memory sockets B1 and B4
channel 1: memory sockets B2 and B5
channel 2: memory sockets B3 and B6
General Memory Module Installation Guidelines
This 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 best performance:
•
UDIMMs and RDIMMs must not be mixed.
•
x4 and x8 DRAM based DIMMs can be mixed. For more information, see Mode-Specific Guidelines.
•
A maximum of two UDIMMs can be populated in a channel.
•
A maximum of two quad-rank RDIMMs can be populated in a channel.
•
A maximum of two single- or dual-rank RDIMMs can be populated in a channel.
•
One quad-rank RDIMM and one single- or dual-rank RDIMM can be populated per channel.
•
Populate DIMM sockets only if a processor is installed. For single-processor systems, sockets A1 to A6 are
available. For dual-processor systems, sockets A1 to A6 and sockets B1 to B6 are available.
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