Dell PowerEdge M420 Dell PowerEdge M620 Systems Owner's Manual - Page 31

General Memory Module Installation Guidelines, Memory Socket Locations

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Figure 7. Memory Socket Locations Memory channels are organized as follows: Processor 1 channel 0: slots A2, A6, and A10 channel 1: slots A1, A5, and A9 channel 2: slots A4, A8, and A12 channel 3: slots A3, A7, and A11 Processor 2 channel 0: slots B2, B6, and B10 channel 1: slots B1, B5, and B9 channel 2: slots B4, B8, and B12 channel 3: slots B3, B7, and B11 General Memory Module Installation Guidelines NOTE: Memory configurations that fail to observe these guidelines can prevent your system from starting and producing any video output, hanging during memory configuration, or operating with reduced memory. 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. • Up to two quad-rank RDIMMs and up to three dual- or single-rank RDIMMs can be populated per channel. • Populate DIMM sockets only if a processor is installed. For single-processor systems, sockets A1 to A12 are available. For dual-processor systems, sockets A1 to A12 and sockets B1 to B12 are available. 31

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Figure 7. Memory Socket Locations
Memory channels are organized as follows:
Processor 1
channel 0: slots A2, A6, and A10
channel 1: slots A1, A5, and A9
channel 2: slots A4, A8, and A12
channel 3: slots A3, A7, and A11
Processor 2
channel 0: slots B2, B6, and B10
channel 1: slots B1, B5, and B9
channel 2: slots B4, B8, and B12
channel 3: slots B3, B7, and B11
General Memory Module Installation Guidelines
NOTE:
Memory configurations that fail to observe these guidelines can prevent your system from starting and
producing any video output, hanging during memory configuration, or operating with reduced memory.
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.
•
Up to two quad-rank RDIMMs and up to three dual- or single-rank RDIMMs can be populated per channel.
•
Populate DIMM sockets only if a processor is installed. For single-processor systems, sockets A1 to A12 are
available. For dual-processor systems, sockets A1 to A12 and sockets B1 to B12 are available.
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