27
Main memory
Fitting rules
The following notes describe information to consider when installing DIMMs:
●
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 of the same size,
and type.
●
There must be at least one memory card with one pair of DIMMs installed
for the server to operate.
●
Install the DIMMs on each memory card in the order shown in
table 2
. You
must install at least one pair of DIMMs on each memory card.
I
Add odd-numbered DIMMs to each available memory card first, then add
the even-numbered pairs.
Memory cards A and B are contained in the basic configuration (see double
lines in the table). In memory card A, DIMM pair 1 and 3 (memory bank 1) is
included in the basic configuration of each base unit or extension unit.
Memory card order
Memory card
Memory bank
DIMM pair
First
A
1
1 and 3
2
2 and 4
Second
B
1
1 and 3
2
2 and 4
Third
C
1
1 and 3
2
2 and 4
Fourth
D
1
1 and 3
2
2 and 4
Table 2: Memory card installation sequence
