Installing And Removing Memory Modules; Supported Memory; Memory Map And Population Rules; Figure 28. Dimm Nomenclature - Intel MFS5520VI - Multi-Flex Server Compute Module User Manual

Installing and Removing Memory Modules

Supported Memory

The compute module provides support for up to twelve DIMMs across six memory
channels (three channels per processor).
DIMMs must be populated in pairs across consecutive channels starting with the lowest
numbered slot in each channel.

Memory Map and Population Rules

The nomenclature for DIMM sockets implemented on the Intel
MFS5520VI is detailed in the following figure.
Processor Socket 1
Channel A Channel B
A1 A2 B1
The following general rules must be observed when selecting and configuring memory to
obtain the best performance from the compute module.
•
Mixing RDIMMs and UDIMMs is not supported.
•
DIMMs are organized into physical slots on DDR3 memory channels that belong to
processor sockets.
•
The memory channels from processor socket 1 are identified as Channel A, B, and C.
The memory channels from processor socket 2 are identified as Channel D, E, and F.
•
The DIMM slot identifiers on the compute module Quick Reference Label provide
information about the channel, and therefore the processor to which they belong. For
example, DIMM_A1 is the first DIMM slot on Channel A on processor 1; DIMM_D1
is the first DIMM socket on Channel D on processor 2.
•
When CPU Socket 1 is empty, any DIMM memory in Channel A through Channel C
is unavailable.
•
When CPU Socket 2 is empty, any DIMM memory in Channel D through Channel F
is unavailable.
•
If both processor sockets are populated but Channel A through Channel C is empty,
the platform can still function with remote memory in Channel D through Channel F.
However, platform performance suffers latency due to remote memory.
•
The memory operational mode is configurable at the channel level. Two modes are
supported: Independent Channel Mode and Mirrored Channel Mode.
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Intel Compute Module MFS5520VI User Guide
Channel C
B2 C1 C2

Figure 28. DIMM Nomenclature

Processor Socket 2
Channel D Channel E
D1 D2 E1
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Compute Module
Channel F
E2 F1 F2
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