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Processor 1 channel 0: slots A1, A5, and A9
channel 1: slots A2, A6, and A10
channel 2: slots A3, A7, and A11
channel 3: slots A4, A8, and A12
Processor 2 channel 0: slots B1, B5, and B9
channel 1: slots B2, B6, and B10
channel 2: slots B3, B7, and B11
channel 3: slots B4, B8, and B12
The following table shows the memory populations and operating frequencies for the supported configurations.
DIMM Type DIMMs Populated/
Channel
Operating Frequency (in MT/s) Maximum DIMM Rank/
Channel
1.5 V 1.35 V
UDIMM ECC 1 1600, 1333, 1066, and
800
1600, 1333, 1066 and 800 Dual rank
2 1600, 1333, 1066, and
800
1600, 1333, 1066 and 800 Dual rank
RDIMM 1 1866, 1600, 1333, 1066,
and 800
1600, 1333, 1066, and 800 Dual rank
1333, 1066 and 800 1066 and 800 Quad rank
2 1866, 1600, 1333, 1066,
and 800
1600, 1333, 1066, and 800 Dual rank
1066 and 800 1066 and 800 Quad rank
3 1333, 1066 and 800 1066 and 800 Dual rank
LRDIMM 1 1866, 1600, 1333 and
1066
1600, 1333 and 1066 Quad rank
1600, 1333 and 1066 Not applicable Octal rank
2 1600, 1333 and 1066 1600, 1333 and 1066 Quad rank
1600, 1333 and 1066 Not applicable Octal rank
3 1333 and 1066 1066 Quad rank
1333 and 1066 Not applicable Octal rank
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, RDIMMs, and LRDIMMs 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.
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