Hardware options installation 31
General DIMM slot population guidelines
Observe the following guidelines for all AMP modes:
•
Populate DIMM slots for a processor only if the processor is installed.
•
To maximize performance in multi-processor configurations, distribute the total memory capacity
between all processors as evenly as possible.
•
Do not mix Unbuffered and Registered PC3 DIMMs.
•
Each channel supports up to two Unbuffered DIMMs.
•
If quad-rank DIMMs are installed for a processor, a maximum of two DIMMs can be installed on each
channel for that processor.
If a channel contains quad-rank DIMMs, the quad-rank DIMM must be installed first on that channel.
DIMM speeds are supported as indicated in the following table.
Populated slots
(per channel)
Rank
Speeds supported
(MHz)
1
Single- or dual-rank
1333, 1066
1
Quad-rank
1066
2
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
31
).
•
DIMMs may be installed individually.
Single-processor Advanced ECC population order
For Advanced ECC mode configurations with a single processor, populate the DIMM slots in the following
order:
•
RDIMM: Sequentially in alphabetical order (A through F)
•
UDIMM: Sequentially in alphabetical order (A through F).
Multi-processor Advanced ECC population order
For Advanced ECC mode configurations with multiple processors, populate the DIMM slots for each
processor in the following order:
•
RDIMM: Sequentially in alphabetical order (A through F)
•
UDIMM: Sequentially in alphabetical order (A through F).
Mirrored Memory population guidelines
For Mirrored Memory mode configurations, observe the following guidelines:
•
Observe the general DIMM slot population guidelines (on page
31
).
•
Always install DIMMs in channels 1 and 2 for each installed processor.
