Mode-Specific Guidelines - Dell EMC PowerEdge R940 Installation And Service Manual
Hide thumbs
Also See for EMC PowerEdge R940:
- Installation and service manual (161 pages) ,
- Technical manual (51 pages) ,
- Service (14 pages)
Table of Contents
Advertisement
Table 24. 4 socket PMem configurations (continued)
No. of
PMem
DRAM
CPUs in
Populat
Populat
the
ionn
Server
4
512 GB x
32 GB x
24
4
512 GB x
64 GB x
16
4
512 GB x
64 GB x
24
4
512 GB x
128 GB x
24
4
256 GB
16 GB x
x 16
4
256 GB
16 GB x
x 24
4
256 GB
32 GB x
x 16
4
256 GB
32 GB x
x 24
4
256 GB
64 GB x
x 16
4
256 GB
64 GB x
x 24
4
256 GB
128 GB x
x 24
NOTE:
There are limited configurations available for Dual Socket Servers with only one CPU populated.
NOTE:
PMem is supported on systems with 1600W and 2400W PSU configuration.
Mode-specific guidelines
The configurations allowed depend on the memory mode selected in the System BIOS.
Table 25. Memory operating modes
Memory Operating Mode
Optimizer Mode
Mirror Mode
72
Installing and removing system components
DRAM
PMem
Capacit
Capacit
ion
y (GB)
y (GB)
768
12,288
24
1,536
8,192
24
1,536
12,288
24
3,072
12,288
24
384
4,096
24
384
6,144
24
768
4,096
24
768
6,144
24
1,536
4,096
24
1,536
6,144
24
3,072
6,144
24
Description
The Optimizer Mode if enabled, the DRAM controllers operate independently in the
64-bit mode and provide optimized memory performance.
NOTE:
The Mirror Mode if enabled, the system maintains two identical copies of data in
memory, and the total available system memory is one half of the total installed physical
memory. Half of the installed memory is used to mirror the active memory modules.
This feature provides maximum reliability and enables the system to continue running
even during a catastrophic memory failure by switching over to the mirrored copy.
The installation guidelines to enable Mirror Mode require that the memory modules be
identical in size, speed, and technology, and they must be populated in sets of 6 per
processor.
Operati
Total
ng
Memory
system
(GB)
Memory
in
Memory
Mode
(GB)
12,288
13,056
8,192
9,728
12,288
13,824
12,288
15,360
4,096
4,480
6,144
6,528
4,096
4,864
6,144
6,912
N/A
5,632
6,144
7,680
N/A
9,216
PMem supports only Optimizer mode.
Total
Ratio
Require
Memory
DRAM
s an M
per
to
or L
CPU
Optane
CPU
(GB)
Memory
3,264
1 : 16
L SKU
2,432
1 : 5.3
L SKU
3,456
1 : 8
L SKU
3,840
1 : 4
L SKU
1,120
1 : 10.7
L SKU
1,632
1 : 16
L SKU
1,216
1 : 5.3
L SKU
1,728
1 : 8
L SKU
1,408
1 : 2.7
L SKU
1,920
1 : 4
L SKU
2,304
1 : 2
L SKU
Support
Support
ed in
ed in
App
Memory
Direct
Mode
Mode
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Advertisement
Table of Contents
