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.
•
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, an
d 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.
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