Installing additional memory modules
The following illustration shows how to install a DIMM on a memory card.
The following notes describe information that you must consider when installing
DIMMs:
v You can configure your server to use memory mirroring and memory scrubbing.
For detailed information about configuring your server and using this feature, see
the User ’s Guide on the IBM System x Documentation CD.
v To use the hot-add and hot-swap memory features, you must reconfigure your
server using the Configuration/Setup Utility program. See the User’s Guide on
the IBM System x Documentation CD for additional information.
v There must be at least one memory card with one pair of DIMMs installed for the
server to operate.
v When you install additional DIMMs on a memory card, be sure to install them in
pairs. All the DIMM pairs on each memory card must be the same size, and type.
v Install the DIMMs on each memory card in the order shown in the following table.
You must install at least one pair of DIMMs on each memory card. See the
User’s Guide on the IBM System x Documentation CD for additional memory
configuration installation sequences.
Table 2. Memory card installation sequence for performance configuration
Memory card order Memory card DIMM pair
First 1 1 and 3
Second 2 1 and 3
Third 3 1 and 3
Fourth 4 1 and 3
Fifth 1 2 and 4
Sixth 2 2 and 4
Seventh 3 2 and 4
Eighth 4 2 and 4
Note: Add odd numbered DIMMs to each available memory card first, then add
the even numbered pairs.
v If memory mirroring is enabled, you can hot-replace one memory card at a time
on each memory power bus.
Chapter 2. Installing options 11
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