Dell PowerEdge R840 EMC Installation and Service Manual - Page 74

DCPMM installation guidelines

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DCPMM installation guidelines The following are the recommended guidelines for installing data center persistent memory module (DCPMM) memory modules: • Each system supports maximum of one DCPMM memory module per channel. NOTE: If two different DCPMM capacities are mixed, an F1/F2 warning is displayed as the configuration is not supported. • DCPMM can be mixed with RDIMM, LRDIMM, and 3DS LRDIMM. • Mixing of DDR4 DIMM types (RDIMM, LRDIMM, and 3DS LRDIMM), within channels, for Integrated Memory Controller (iMC), or across sockets are not supported. • Mixing of DCPMM operating modes (App Direct, Memory Mode) is not supported. • If only one DIMM is populated on a channel, it should always go to the first slot in that channel (white slot). • If a DCPMM and a DDR4 DIMM are populated on the same channel, always plug DCPMM on second slot (black slot). • If the DCPMM is configured in Memory Mode, the recommended DDR4 to DCPMM capacity ratio is 1:4 to 1:16 per iMC. • DCPMMs' cannot be mixed with other DCPMMs capacities or NVDIMMs. • Mixing different capacities of RDIMMs and LRDIMMs are not allowed when DCPMM is installed. • DCPMMs of different capacities are not allowed. For more information about the supported DCPMM configurations, see the Dell EMC DCPMM User 's Guide at https://www.dell.com/ support/home/products/server_int/server_int_poweredge. Table 12. 2 socket DCPMM configurations No. of CPUs in the Server DCPMM DRAM Populati Populati on on DRAM Capaci ty (GB) DCPM Operating M system Capacit Memory in y (GB) Memory Mode (GB) 2 128 GB x 16 GB x 192 128 N/A 1 12 2 128 GB x 16 GB x 192 256 N/A 2 12 2 128 GB x 16 GB x 8 128 512 512 4 2 128 GB x 16 GB x 192 512 N/A 4 12 2 128 GB x 16 GB x 192 1,024 1,024 8 12 2 128 GB x 16 GB x 192 1,536 1,536 12 12 2 128 GB x 32 GB x 384 128 N/A 1 12 2 128 GB x 32 GB x 384 256 N/A 2 12 2 128 GB x 32 GB x 384 512 N/A 4 12 2 128 GB x 32 GB x 384 1,024 N/A 8 12 2 128 GB x 32 GB x 384 1,536 1,536 12 12 2 128 GB x 64 GB x 768 512 N/A 4 12 2 128 GB x 64 GB x 768 1,024 N/A 8 12 Total Memory (GB) Total Memor y per CPU (GB) 320 160 Ratio DRAM to Optane Memory 1 : 0.7 Requi Suppor res an ted in M or App L Direct CPU Mode Support ed in Memory Mode No Yes No 448 224 1 : 1.3 No Yes No 640 320 1 : 4 No Yes Yes 704 352 1 : 2.7 No Yes No 1,216 608 1 : 5.3 No Yes Yes 1,728 864 1 : 8 No Yes Yes 512 256 1 : 0.3 No Yes No 640 320 1 : 0.7 No Yes No 896 448 1 : 1.3 No Yes No 1,408 704 1 : 2.7 No Yes No 1,920 960 1 : 4 No Yes Yes 1,280 640 1 : 0.7 No Yes No 1,792 896 1 : 1.3 No Yes No 74 Installing and removing system components

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DCPMM installation guidelines
The following are the recommended guidelines for installing data center persistent memory module (DCPMM) memory modules:
•
Each system supports maximum of one DCPMM memory module per channel.
NOTE:
If two different DCPMM capacities are mixed, an F1/F2 warning is displayed as the configuration is not
supported.
•
DCPMM can be mixed with RDIMM, LRDIMM, and 3DS LRDIMM.
•
Mixing of DDR4 DIMM types (RDIMM, LRDIMM, and 3DS LRDIMM), within channels, for Integrated Memory Controller (iMC), or
across sockets are not supported.
•
Mixing of DCPMM operating modes (App Direct, Memory Mode) is not supported.
•
If only one DIMM is populated on a channel, it should always go to the first slot in that channel (white slot).
•
If a DCPMM and a DDR4 DIMM are populated on the same channel, always plug DCPMM on second slot (black slot).
•
If the DCPMM is configured in Memory Mode, the recommended DDR4 to DCPMM capacity ratio is 1:4 to 1:16 per iMC.
•
DCPMMs' cannot be mixed with other DCPMMs capacities or NVDIMMs.
•
Mixing different capacities of RDIMMs and LRDIMMs are not allowed when DCPMM is installed.
•
DCPMMs of different capacities are not allowed.
For more information about the supported DCPMM configurations, see the
Dell EMC DCPMM User 's Guide
at
support/home/products/server_int/server_int_poweredge
.
Table 12. 2 socket DCPMM configurations
No. of
CPUs
in the
Server
DCPMM
Populati
on
DRAM
Populati
on
DRAM
Capaci
ty
(GB)
DCPM
M
Capacit
y (GB)
Operating
system
Memory in
Memory
Mode (GB)
Total
Memory
(GB)
Total
Memor
y per
CPU
(GB)
Ratio
DRAM to
Optane
Memory
Requi
res an
M or
L
CPU
Suppor
ted in
App
Direct
Mode
Support
ed in
Memory
Mode
2
128 GB x
1
16 GB x
12
192
128
N/A
320
160
1 : 0.7
No
Yes
No
2
128 GB x
2
16 GB x
12
192
256
N/A
448
224
1 : 1.3
No
Yes
No
2
128 GB x
4
16 GB x 8
128
512
512
640
320
1 : 4
No
Yes
Yes
2
128 GB x
4
16 GB x
12
192
512
N/A
704
352
1 : 2.7
No
Yes
No
2
128 GB x
8
16 GB x
12
192
1,024
1,024
1,216
608
1 : 5.3
No
Yes
Yes
2
128 GB x
12
16 GB x
12
192
1,536
1,536
1,728
864
1 : 8
No
Yes
Yes
2
128 GB x
1
32 GB x
12
384
128
N/A
512
256
1 : 0.3
No
Yes
No
2
128 GB x
2
32 GB x
12
384
256
N/A
640
320
1 : 0.7
No
Yes
No
2
128 GB x
4
32 GB x
12
384
512
N/A
896
448
1 : 1.3
No
Yes
No
2
128 GB x
8
32 GB x
12
384
1,024
N/A
1,408
704
1 : 2.7
No
Yes
No
2
128 GB x
12
32 GB x
12
384
1,536
1,536
1,920
960
1 : 4
No
Yes
Yes
2
128 GB x
4
64 GB x
12
768
512
N/A
1,280
640
1 : 0.7
No
Yes
No
2
128 GB x
8
64 GB x
12
768
1,024
N/A
1,792
896
1 : 1.3
No
Yes
No
74
Installing and removing system components