Table 32. Memory channels
Processor
Channel 0
Channel 1
Channel 2
Channel 3
Processor 1
slots A1 and A5
slots A2 and A6
slots A3 and A7
slots A4 and A8
Processor 2
slot B1
slot B2
slot B3
slot B4
The following table shows the memory populations and operating frequencies for the supported configurations.
Table 33. Memory populations and operating frequencies
DIMM Type
DIMMs Populated/
Channel
Voltage
Operating Frequency (in
MT/s)
Maximum DIMM Rank/Channel
RDIMM
1
1.2 V
2400, 2133, and 1866
Single rank or dual rank
2
Related link
General memory module installation guidelines
NOTE:
Memory configurations that fail to observe these guidelines can prevent your system from booting, stop responding
during memory configuration, or operating with reduced memory.
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:
•
x4 and x8 DRAM based memory modules can be mixed. For more information, see the Mode-specific guidelines section.
•
Up to two 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 A8 are available. For dual-processor
systems, sockets A1 to A8 and sockets B1 to B4 are available.
•
Populate all sockets with white release levers first, and then all the sockets with black release levers.
•
When mixing memory modules with different capacities, populate the sockets with memory modules with highest capacity first. For
example, if you want to mix 4 GB and 8 GB memory modules, populate 8 GB memory modules in the sockets with white release tabs
and 4 GB memory modules in the sockets with black release tabs.
•
In a dual-processor configuration, the memory configuration for each processor should be identical. For example, if you populate socket
A1 for processor 1, then populate socket B1 for processor 2, and so on.
•
Memory modules of different capacities can be mixed provided other memory population rules are followed (for example, 4 GB and 8
GB memory modules can be mixed).
•
Mixing of more than two memory module capacities in a system is not supported.
•
Populate two DIMMs per processor (one DIMM per channel) at a time to maximize performance,
Related link
Mode-specific guidelines
Four memory channels are allocated to each processor. The allowable configurations depend on the memory mode selected.
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Installing and removing system components
