Lenovo System x3850 X6 Installation And Service Manual page 68

Table 10. DIMM population sequence for independent memory mode (continued)
DIMM installation order
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Memory mirroring in independent memory mode
This topic describes using the memory mirroring feature in independent memory mode.
To enable the memory mirroring feature in independent memory mode through the Setup utility, select
System Settings → Memory → Memory Mode. For more information, see "Using the Setup utility" on page
123. For more information and notes about installing DIMMs, see "Installing a memory module" on page 46
and "Independent memory mode" on page 53..
Consider the following information when using the memory mirroring feature in independent memory mode:
• Independent memory mode provides the most efficient performance.
• You can populate DIMMs in any order and there are no matching requirements. However, the DIMM
population sequence in the following table will provide the best performance when operating in the
supported memory modes.
• When you operate in this mode, the memory channel operates at twice the DDR3 data rate.
• Single-device data correction (SDDC) is supported for x4 SDRAM technology.
The following table lists the installation sequence for memory mirroring in independent mode:
Table 11. DIMM population sequence with memory mirroring enabled or disabled in independent memory mode
DIMM installation order
1
2
3
4
54
System x3850 X6 and x3950 X6 Installation and Service Guide
Independent mode with memory
mirroring disabled
DIMM connector 5
DIMM connector 2
DIMM connector 11
DIMM connector 14
DIMM connector 23
DIMM connector 20
DIMM connector 17
DIMM connector 7
DIMM connector 4
DIMM connector 3
DIMM connector 12
DIMM connector 13
DIMM connector 22
DIMM connector 21
DIMM connector 18
Independent mode with memory
mirroring disabled
DIMM connector 9
DIMM connector 6
DIMM connector 1
DIMM connector 10
Independent mode with memory
mirroring enabled
DIMM connectors 4 and 18
DIMM connectors 3 and 13
DIMM connectors 12 and 22
Independent mode with memory
mirroring enabled
DIMM connectors 9 and 19
DIMM connectors 6 and 16
DIMM connectors 1 and 15
DIMM connectors 10 and 24