General DIMM slot population guidelines

Observe the following guidelines for all AMP modes:

●Install DIMMs only if the corresponding processor is installed.

●When two processors are installed, balance the DIMMs across the two processors.

●White DIMM slots denote the first slot of a channel (Ch 1-A, Ch 2-B, Ch 3-C, Ch 4-D).

●Do not mix LRDIMMs, UDIMMs, RDIMMs, or HDIMMs.

●Do not install more than two UDIMMs per channel. UDIMMs should not be installed in slots Ch 1-I, Ch 2-J, Ch 3-K, or Ch 4-L.

●HDIMMs require 12 DIMMs per processor.

●When two processors are installed, install the DIMMs in sequential alphabetical order balanced between the two processors: P1-A, P2-A, P1-B, P2-B, P1-C, P2-C, and so on.

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).

DIMM speeds are supported as indicated in the following table.

Populated slots (per channel)

Rank

Speeds supported (MT/s)

 

 

 

1

Single- or dual-rank

1333, 1600

 

 

 

1

Quad-rank

1333

 

 

 

2

Single- or dual-rank

1333

 

 

 

3

Single- or dual-rank

1066

 

 

 

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.

Online spare population

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:

◦A single dual-rank DIMM is not a valid configuration.

◦LRDIMMs are treated as dual-rank DIMMs.

44 Chapter 5 Hardware options installation