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Table 25. Channel and slot information of DIMMs around a processor
Slot
0
Channel
Channel 2
DIMM number
1
(Processor 1)
DIMM number
13
(Processor 2)
DIMM number
25
(Processor 3)
DIMM number
37
(Processor 4)
Memory module installation guideline
• Two types of configurations are supported. Consider corresponding rules and population sequence
accordingly:
– "DRAM DIMMs installation order" on page 153 (RDIMMs or 3DS RDIMMs)
– "PMEM and DRAM DIMM installation order" on page 159
• A label on each DIMM identifies the DIMM type. This information is in the format xxxxx nRxxx PC4-
xxxxx-xx-xx-xxx. Where n indicates if the DIMM is single-rank (n=1) or dual-rank (n=2).
• At least one DIMM is required for each processor. Install at least six DIMMs per processor for good
performance.
• When you replace a DIMM, the server provides automatic DIMM enablement capability without requiring
you to use the Setup utility to enable the new DIMM manually.
Attention:
• Mixing x4 and x8 DIMMs in the same channel is allowed.
• Install DIMMs of the same speed for optimal performance. Otherwise, the BIOS will find and run the
lowest speed among all channels.
• Always populate DIMMs with the maximum number of ranks in the farthest DIMM slot, followed by the
nearest DIMM slot.
• Mixing 128 GB and 256 GB 3DS RDIMMs is not supported.
DRAM DIMMs installation order
This section contains information of how to install DRAM DIMMs properly.
1
0
1
0
Channel 1
Channel 0
2
3
4
5
14
15
16
17
26
27
28
29
38
39
40
41
1
6
Processor
18
30
42
1
0
1
0
Channel 0
Channel 1
7
8
9
10
19
20
21
22
31
32
33
34
43
44
45
46
.
Chapter 5
Server hardware setup
1
0
Channel 2
11
12
23
24
35
36
47
48
153
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