Dell PowerEdge M620 Owner's Manual page 187

Table 3-6. Examples of PowerEdge M805 Memory Configurations
Total Memory Modules -
System Number and Size
Memory
64 GB* Eight 8 GB
128 GB Sixteen 8 GB
*If 64 GB of memory is installed, the system recognizes only 63.75 GB during POST.
Non-Optimal Memory Configurations
System performance can be affected if your memory configuration does not
conform to the preceding installation guidelines. Your system may issue an
error message during start-up stating that your memory configuration is non-
optimal.
Memory Sparing Support - PowerEdge M805
Memory sparing (spare bank) is supported in systems that have one of the
memory configurations shown in Table 3-7. The memory sparing feature must
also be enabled in the Memory Information screen of the System Setup
program. See "Memory Settings Screen" on page 140. To use memory sparing,
you must disable node interleaving.
Table 3-7. Memory Sparing Configurations
NOTE:
Memory sparing is supported if 16 identical memory modules are installed.
Total Usable
System System
Memory Memory
32 GB 28 GB
64 GB 56 GB
128 GB 112 GB
Memory Module Locations
A1, A2, A3, A4, B1, B2, B3, B4
A1, A2, A3, A4, A5, A6, A7, A8, B1, B2, B3,
B4, B5, B6, B7, B8
Memory Modules -
Number and Size
Sixteen 2 GB
Sixteen 4 GB
Sixteen 8 GB
–
PowerEdge M805
Memory Module Locations
A1, A2, A3, A4, A5, A6, A7, A8, B1, B2,
B3, B4, B5, B6, B7, B8
A1, A2, A3, A4, A5, A6, A7, A8, B1, B2,
B3, B4, B5, B6, B7, B8
A1, A2, A3, A4, A5, A6, A7, A8, B1, B2,
B3, B4, B5, B6, B7, B8
Installing Blade Components
(continued)
187