
Hardware options installation 51
• Do not mix LRDIMMs and RDIMMs.
• UDIMMs are not supported on this server.
• When multiple processors are installed, HP recommends installing the DIMMs in sequential
alphabetical order: 4A, 9B, 1C, 12D, 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
1
Quad-rank 1600
2
Single- or dual-rank 1066, 1333
2
Quad-rank 1600
3
Single- or dual-rank 1066
3
Quad-rank 1333
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. HP recommends installing DIMMs in pairs.
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:
o A single dual-rank DIMM is not a valid configuration.
o LRDIMMs are treated as dual-rank DIMMs.
Installing a DIMM
WARNING: Use caution when installing or removing the processor memory drawer. The
processor memory drawer is very heavy when fully populated.
To install the component:
1. Power down the server (on page 23).
2. Remove all power:
a. Disconnect each power cord from the power source.
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