9-26 Upgrading Your Server
Installation Order and Notes
Single channel memory configuration
Install DIMMs one by one in the ascending order of DIMM slot numbers.
Dual channel memory configuration
To activate the dual channel mode, the following conditions must be met:
– Matched DIMM configuration in each channel
– Same density*
– Same DRAM technology*
– Same DRAM bus width*
– All either single-sided or dual-sided
– Matched in both channels.
– Populate symmetrical memory slots (#1 and #3, #2 and #4).
The following table lists an example of the relationship between the installation condition and the dual
channel memory mode.
DIMM group Installation
example
Dual channel
memory mode
#1 #2 #3 #4
1 Active 512MB
(factory-installed)
None 512MB None
2 Active 512MB
(factory-installed)
1GB 512MB 1GB
3 Inactive 512MB
(factory-installed)
1GB 512MB None
4 Inactive 512MB
(factory-installed)
1GB None 1GB
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