
Lockstep Memory population guidelines
For Lockstep memory mode configurations, observe the following guidelines:
●
Observe the general DIMM slot population guidelines.
●
DIMM configuration on all channels of a processor must be identical.
●
In multi-processor configurations, each processor must have a valid Lockstep Memory
configuration.
●
In multi-processor configurations, each processor may have a different valid Lockstep Memory
configuration.
Population order
For memory configurations with a single processor or multiple processors, populate the DIMM slots in
the following order:
●
LRDIMM: Sequentially in alphabetical order (A through L)
●
RDIMM: Sequentially in alphabetical order (A through L)
●
UDIMM: A through H, sequentially in alphabetical order. Do not populate DIMM slots I through L.
●
HDIMM: All 12 DIMMs per processor must be populated.
After installing the DIMMs, use RBSU to configure Advanced ECC, online spare, or lockstep memory
support.
Installing a DIMM
The server supports up to 24 DIMMs. To install a DIMM:
1
.
Power down the server on page 18.
2
. Remove all power:
a
. Disconnect each power cord from the power source.
b
. Disconnect each power cord from the server.
3
.
Extend the server from the rack on page 19.
4. Remove the access panel on page 20.
5
.
Remove the air baffle on page 28.
6
. Open the DIMM slot latches.
Memory options 45
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