Lenovo HX1310 Installation And Service Manual page 132

You can enable rank sparing memory in the Setup Utility, select System Settings ➙ Memory. For more
information, see "Using the Setup Utility" on page 31.
The maximum available memory is reduced when memory rank sparing mode is enabled.
The following diagram lists the DIMM connectors on each memory channel.
Figure 43. Connectors on each memory channel
Follow the installation sequence for rank sparing mode:
• Install at least one quad-rank DIMM in a channel.
• Install at least two single-rank or dual-rank DIMMs in a channel.
Table 25. Memory rank sparing mode DIMM population sequence when only quad-rank RDIMMs are installed
Number of installed
microprocessors
One
Two
Table 26. Memory rank sparing mode DIMM population sequence when single/dual/quad rank DIMMs are installed and
the total number of DIMMs is even
DIMMs
One Microprocessor
1st set
2nd set
3rd set
4th set
5th set
6th set
Two Microprocessors
1st set
2nd set
3rd set
4th set
5th set
6th set
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HX1310, HX2310-E, HX3310, HX3310-F Installation and Service Guide
DIMM connector population sequence on the system board
1, 4, 9, 12, 2, 5, 8, 11
1, 13, 4, 16, 9, 21, 12, 24, 2, 14, 5, 17, 8, 20, 11, 23
Number of installed
microprocessors
1
1
1
1
1
1
2
2
2
2
2
2
DIMM connector population
sequence on the system board
1, 2
4, 5
8, 9
11, 12
3, 6
7, 10
1, 2
13, 14
4, 5
16, 17
8, 9
20, 21