Hardware options installation 54
For detailed memory configuration rules and guidelines, use the Online DDR3 Memory Configuration Tool
on the HP website (http://www.hp.com/go/ddr3memory-configurator).
Advanced ECC population guidelines
For Advanced ECC mode configurations, observe the following guidelines:
• Observe the general DIMM slot population guidelines.
• DIMMs may be installed individually.
Population order
For memory configurations with a single processor or multiple processors, populate the DIMM slots
sequentially in alphabetical order (A through F).
For Advanced ECC mode configurations with multiple processors, populate the DIMM slots sequentially in
alphabetical order (P1-A, P2-A, P1-B, P2-B and so forth)
After installing the DIMMs, use RBSU ("HP ROM-Based Setup Utility" on page 83) to configure the memory
protection modes.
Online Spare population guidelines
For Online Spare memory mode configurations, observe the following guidelines:
• Observe the general DIMM slot population guidelines.
• Each channel must have a valid online spare configuration.
• Each channel can have a different valid online spare configuration.
• Each populated channel must have a spare rank:
o A single dual-rank DIMM is not a valid configuration.
o LRDIMMs are treated as dual-rank DIMMs.
Population order
For Online Spare memory mode configurations with a single processor or multiple processors, populate the
DIMM slots sequentially in alphabetical order (A through F).
For Online Spare memory mode configurations with multiple processors, populate the DIMM slots
sequentially in alphabetical order (P1-A, P2-A, P1-B, P2-B and so forth).
After installing the DIMMs, to configure memory protection mode, use RBSU ("HP ROM-Based Setup Utility"
on page 83).
Lockstep Memory mode population guidelines
For Lockstep memory mode configurations, observe the following guidelines:
• Observe the general DIMM slot population guidelines.
• Always install DIMMs in channel 2 and 3 for each installed processor.
• Do not install DIMMs in channel 1 for any processor.
• DIMM configuration in channel 2 and channel 3 of a processor must be identical.
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