H3C UniServer R6900 G3, User Manual

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6-40
Guidelines
WARNING!
The DIMMs are not hot swappable.
You can install a maximum of 12 DIMMs for each processor, six DIMMs per memory controller. For
more information, see "DIMM slots."
For a DIMM to operate at 2933 MHz, make sure the following conditions are met:
•
Use Cascade Lake processors that support 2933 MHz data rate.
•
Use DIMMs with a maximum of 2933 MHz data rate.
•
Install only one DIMM per channel.
The supported DIMMs vary by processor model, as shown in Table 6-3 .
Table 6-3 Supported DIMMs of a processor
Processor Supported DIMMs
Skylake Only DRAM DIMMs.
Cascade Lake
•
Only DRAM DIMMs.
•
Mixture of DCPMM and DRAM DIMMs.
Jintide-C series Only DRAM DIMMs.
Guidelines for installing only DRAM DIMMs
When you install only DRAM DIMMs, follow these restrictions and guidelines:
•
Make sure all DRAM DIMMs installed on the server have the same specifications.
•
Make sure the corresponding processor is present before powering on the server.
•
Make sure the number of ranks per channel does not exceed eight.
•
For the memory mode setting to take effect, make sure the following installation requirements
are met when you install DRAM DIMMs for a processor:
Memory mode DIMM requirements
Independent
•
If only one processor is present, see Figure 6-47 .
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If two processors of model 6xxx or 8xxx are present, see Figure 6-48 .
•
If two processors of model 5xxx are present, see Figure 6-49 .
•
If four processors are present, see Figure 6-50 .
Mirror
Partial Mirror
•
A minimum of two DIMMs for a processor.
•
This mode does not support DIMM population schemes that are not
recommended in
Figure 6-47 , Figure 6-48 , Figure 6-49 , and Figure 6-50 .
•
If only one processor is present, see Figure 6-47 .
•
If two processors of model 6xxx or 8xxx are present, see Figure 6-48 .
•
If two processors of model 5xxx are present, see Figure 6-49 .
•
If four processors are present, see Figure 6-50 .
Memory Rank
Sparing
•
A minimum of 2 ranks per channel.
•
If only one processor is present, see Figure 6-47 .
•
If two processors of model 6xxx or 8xxx are present, see Figure 6-48 .
•
If two processors of model 5xxx are present, see Figure 6-49 .
•
If four processors are present, see Figure 6-50 .