28
Memory mode
DIMM population requirements
Mirror
•
A minimum of two DIMMs for a processor.
•
This mode does not support DIMM population schemes that are not
recommended.
If one processor is present, see
If two processors are present, see
Memory Rank
Sparing
•
Make sure no less than two ranks are configured for each channel.
•
Strictly follow the DIMM population schemes:
If one processor is present, see
If two processors are present, see
NOTE:
•
If the DIMM configuration does not meet the requirements for the configured memory mode,
the system uses the default memory mode (Independent mode). The BIOS does not display
the configuration item for Independent mode.
•
In
, the black DIMM slots (for example, the A12 slot) are grey colored,
and the white DIMM slots (for example, the A6 slot) are not colored.
Figure 5 DDR4-only DIMM population schemes for one processor
Figure 6 DDR4-only DIMM population schemes for two processors
A6
A12
A5
A11
A4
A10
A7
A1
A8
A2
A9
A3
1 DIMM
√
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2 DIMMs
√
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3 DIMMs
√
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4 DIMMs
√
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5 DIMMs
*
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6 DIMMs
√
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7 DIMMs
*
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8 DIMMs
√
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9 DIMMs
*
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10 DIMMs
*
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11 DIMMs
*
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12 DIMMs
√
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DIMM slots (processor 1)
CH6
CH5
CH4
CH1
CH2
CH3
Number of DIMMs
√
: Recommended
*
: Not recommended
DIMM population
A6
A12
A5
A11
A4
A10
A7
A1
A8
A2
A9
A3
B6
B12
B5
B11
B4
B10
B7
B1
B8
B2
B9
B3
1 DIMM
*
●
2 DIMMs
√
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●
3 DIMMs
*
●
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●
4 DIMMs
√
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5 DIMMs
*
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6 DIMMs
√
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7 DIMMs
*
●
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●
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●
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8 DIMMs
√
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9 DIMMs
*
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10 DIMMs
*
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11 DIMMs
*
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12 DIMMs
√
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13 DIMMs
*
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14 DIMMs
*
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15 DIMMs
*
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16 DIMMs
√
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17 DIMMs
*
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18 DIMMs
*
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19 DIMMs
*
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20 DIMMs
*
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21 DIMMs
*
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22 DIMMs
*
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23 DIMMs
*
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24 DIMMs
√
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CH2
CH3
CH5
CH4
CH1
Number of DIMMs
√
: Recommended
*
: Not recommended
DIMM population
DIMM slots (processor 1)
CH6
CH5
CH4
CH1
CH2
CH3
DIMM slots (processor 2)
CH6
