Manual

Hardware options installation 50
• 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, or RDIMMs.
• 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.
• 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 (on page 49).
• DIMMs may be installed individually.
Online Spare population guidelines
For Online Spare memory mode configurations, observe the following guidelines:
• Observe the general DIMM slot population guidelines (on page 49).
• 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.
Lockstep Memory population guidelines
For Lockstep memory mode configurations, observe the following guidelines:
• Observe the general DIMM slot population guidelines (on page 49).
• 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.