User's Guide

Upgrading Your Server 9-15
Adding Order and Precautions
 Adding order depends on the number of CPUs installed.
– 1-CPU configuration:
Install DIMMs starting from the smallest DIMM slot number.
– 2-CPU configuration:
Alternately install DIMMs starting from the smallest DIMM slot number of each
CPU.
 Install DIMMs starting from the largest capacity and from the smallest slot number.
 Adding unit depends on N code assigned to DIMM.
– N8402-042/043/044/045 additional memory board (Registered DIMM):
Can be installed one by one.
– N8402-046 additional memory board (Unbeffered DIMM):
Must be installed two in pair.
 The CPU blade does not operate correctly if Registered DIMM and Unbuffered DIMM
are mixedly installed.
 If the CPU blade does not have CPU#2 installed, DIMM slots CPU2_DIMM1 to
CPU2_DIMM4 are unavailable.