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Main memory
10.1.2.3 Rank Sparing mode
Single-rank RDIMMs
– Same letter represents identical DIMMs (capacity, rank).
– Configurations are defined that the waste for spare-memory is minimized;
performance is not prioritized, i.e. channels will be filled with two DIMMs
before populating new channel.
– "x" must always be DIMM with more ranks than "z".
– If both DIMMs have same number of ranks, "x" represents DIMM with higher
capacity.
CPU
ctrl.
iMC1
channel
F
E
socket
1F
2F
1E
2E
#DIMMs
2
4
6
8
x
10
x
12
x
x
x
#DIMMs
4
)
6
8
10
12
14
x
16
x
18
x
20
x
22
x
x
x
24
x
x
x
278
CPU1
iMC0
D
A
B
1D
2D 2A
1A
2B
1B
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
Upgrade and Maintenance Manual
iMC1
C
M (F)
L (E)
2C
1C 1M
2M
1L
2L
1 CPU populated
x
x
x
x
x
x
x
x
x
x
x
2 CPUs populated
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
CPU2
iMC0
K (D)
G (A)
H (B)
1K
2K 2G
1G
2H
1H
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
RX2530 M4
J (C)
2J
1J
x
x
x
x
x
x
x
x
x
x
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