PMem installation guidelines
The following are the recommended guidelines for installing data center persistent memory module (PMem) memory modules:
For more information about the supported PMem configurations, see the
Dell EMC PMem User 's Guide
at
https://www.dell.com/support/home/products/server_int/server_int_poweredge .
Table 1. 2 socket PMem configurations PMem configurations (2 socket)
No. of CPUs in the Server
PMem Population
DRAM Population
DRAM Capacity (GB)
PMem Capacity (GB)
Operating system Memory in Memory Mode (GB)
Total Memory (GB)
Total Memory per CPU (GB)
Ratio DRAM to Optane Memory
Requires an M or L CPU
Supported in App Direct Mode
Supported 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
2
128 GB x 12
64 GB x 12
768
1,536
N/A
2,304
1,152
1 : 2
L SKU
Yes
No
2
128 GB x 12
128 GB x 12
1,536
1,536
N/A
3,072
1,536
1 : 1
L SKU
Yes
No
2
512 GB x 8
32 GB x 12
384
4,096
4,096
4,480
2,240
1 : 10.7
L SKU
Yes
Yes
2
512 GB x 12
32 GB x 12
384
6,144
6,144
6,528
3,264
1 : 16
L SKU
Yes
Yes
2
512 GB x 8
64 GB x 12
768
4,096
4,096
4,864
2,432
1 : 5.3
L SKU
Yes
Yes
2
512 GB x 12
64 GB x 12
768
6,144
6,144
6,912
3,456
1 : 8
L SKU
Yes
Yes
2
512 GB x 12
128 GB x 12
1,536
6,144
6,144
7,680
3,840
1 : 4
L SKU
Yes
Yes
2
256 GB x 8
16 GB x 12
192
2,048
2,048
2,240
1,120
1 : 10.7
L SKU
Yes
Yes
2
256 GB x 8
32 GB x 12
384
2,048
2,048
2,432
1,216
1 : 5.3
L SKU
Yes
Yes
2
256 GB x 12
32 GB x 12
384
3,072
3,072
3,456
1,728
1 : 8
L SKU
Yes
Yes
2
256 GB x 8
64 GB x 12
768
2,048
N/A
2,816
1,408
1 : 2.7
L SKU
Yes
No
2
256 GB x 12
64 GB x 12
768
3,072
3,072
3,840
1,920
1 : 4
L SKU
Yes
Yes
2
256 GB x 12
128 GB x 12
1,536
3,072
N/A
4,608
2,304
1 : 2
L SKU
Yes
No
Table 2. 4 socket PMem configurations PMem configurations (4 socket)
No. of CPUs in the Server
PMem Populationn
DRAM Population
DRAM Capacity (GB)
PMem Capacity (GB)
Operating system Memory in Memory Mode (GB)
Total Memory (GB)
Total Memory per CPU (GB)
Ratio DRAM to Optane Memory
Requires an M or L CPU
Supported in App Direct Mode
Supported in Memory Mode
4
128 GB x 16
16 GB x 24
384
2,048
2,048
2,432
608
1 : 5.3
No
Yes
Yes
4
128 GB x 24
16 GB x 24
384
3,072
3,072
3,456
864
1 : 8
No
Yes
Yes
4
128 GB x 16
32 GB x 24
768
2,048
N/A
2,816
704
1 : 2.7
No
Yes
No
4
128 GB x 24
32 GB x 24
768
3,072
3,072
3,840
960
1 : 4
No
Yes
Yes
4
128 GB x 24
64 GB x 24
1,536
3,072
N/A
4,608
1,152
1 : 2
L SKU
Yes
No
4
128 GB x 24
128 GB x 24
3,072
3,072
N/A
6,144
1,536
1 : 1
L SKU
Yes
No
4
512 GB x 16
32 GB x 24
768
8,192
8,192
8,960
2,240
1 : 10.7
L SKU
Yes
Yes
4
512 GB x 24
32 GB x 24
768
12,288
12,288
13,056
3,264
1 : 16
L SKU
Yes
Yes
4
512 GB x 16
64 GB x 24
1,536
8,192
8,192
9,728
2,432
1 : 5.3
L SKU
Yes
Yes
4
512 GB x 24
64 GB x 24
1,536
12,288
12,288
13,824
3,456
1 : 8
L SKU
Yes
Yes
4
512 GB x 24
128 GB x 24
3,072
12,288
12,288
15,360
3,840
1 : 4
L SKU
Yes
Yes
4
256 GB x 16
16 GB x 24
384
4,096
4,096
4,480
1,120
1 : 10.7
L SKU
Yes
Yes
4
256 GB x 24
16 GB x 24
384
6,144
6,144
6,528
1,632
1 : 16
L SKU
Yes
Yes
4
256 GB x 16
32 GB x 24
768
4,096
4,096
4,864
1,216
1 : 5.3
L SKU
Yes
Yes
4
256 GB x 24
32 GB x 24
768
6,144
6,144
6,912
1,728
1 : 8
L SKU
Yes
Yes
4
256 GB x 16
64 GB x 24
1,536
4,096
N/A
5,632
1,408
1 : 2.7
L SKU
Yes
No
4
256 GB x 24
64 GB x 24
1,536
6,144
6,144
7,680
1,920
1 : 4
L SKU
Yes
Yes
4
256 GB x 24
128 GB x 24
3,072
6,144
N/A
9,216
2,304
1 : 2
L SKU
Yes
No
NOTE
PMem is supported on systems with 1600W and 2400 W PSU configuration.
Max ambient Temperature is 25C.
Max PMem TDP is 15 W.
PMem supports up to 4 NVMe hard drive (2.5-inches x 32 backplane).
PMem does not support GPU configuration.
Two CPU configurations with 2.5-inches x 32 backplane, does not support 205 W/200 W and 6244/6246/6240Y CPU.
Table 3. PMem Thermal Restrictions The following table shows the PMem Thermal Restriction for the
R940xa
system :
PMem Support
V2 Air-shroud
V1 Air-shroud
8x 2.5-inch SAS/SATA
30C ambient temperature support, 25C ambient temperature with 256GB LRDIMMs
25C ambient temperature support, not supported with 256GB LRDIMM
24x 2.5-inch SAS/SATA
30C ambient temperature support, not supported with 256GB LRDIMM
25C ambient temperature support, not supported with 256GB LRDIMM
32x 2.5-inch SAS/SATA or mixed NVMe
30C ambient temperature support, not supported with 256GB LRDIMM
25C ambient temperature support, not supported with 256GB LRDIMM
NOTE PMem does not support GPU configuration.