BX920 S4
Upgrade and Maintenance Manual
169
Main memory
8.1.1.5
Rank Sparing Mode (single rank (1R) and dual rank (2R) RDIMM
modules)
I
All empty DIMM sockets must be fitted with dummy DIMMs. Once the
DIMM sockets have been fitted with DIMMs and dummy DIMMs, the air
cowl must be laid over the DIMM slots.
Same numbers mean identical modules (capacity, rank).
CPU
CPU 1
CPU 2
Channel
A
B
C
F
E
D
Slot descriptor
1A 2A 1B 2B 1C 2C
2F
1F
2E
1E
2D 1D
# DIMMS
1 CPU populated
2
1
1
4
1
1
1
1
6
1
1
1
1
1
1
1 CPU populated
4
1
1
2
2
6
1
1
1
1
2
2
8
1
1
1
1
2
2
2
2
10
1
1
1
1
1
1
2
2
2
2
12
1
1
1
1
1
1
2
2
2
2
2
2
