Dell PowerEdge M620 Owner's Manual page 186

• Memory must be installed in the same configuration (symmetrically) for
both processors.
• If pairs of memory modules of different sizes are installed, the larger
capacity memory modules must be installed in the lower numbered slots.
• Memory sparing is supported if 16 memory modules are installed.
(Memory mirroring is not supported.)
Table 3-6 shows examples of supported memory configurations.
CAUTION:
sockets to maintain proper cooling airflow.
Table 3-6. Examples of PowerEdge M805 Memory Configurations
Total Memory Modules -
System Number and Size
Memory
4 GB Four 1 GB
8 GB Eight 1 GB
8 GB Four 2 GB
12 GB Twelve 2 GB
16 GB Sixteen 1 GB
16 GB Eight 2 GB
16 GB Four 4 GB
24 GB Twelve 2 GB
32 GB Sixteen 2 GB
32 GB Eight 4 GB
48 GB Twelve 4 GB
64 GB* Sixteen 4 GB
186
Installing Blade Components
Memory module blanks must be installed in unoccupied memory
Memory Module Locations
A1, A2, B1, B2
A1, A2, A3, A4, B1, B2, B3, B4
A1, A2, B1, B2
A1, A2, A3, A4, A5, A6, B1, B2, B3, B4, B5,
B6
A1, A2, A3, A4, A5, A6, A7, A8, B1, B2, B3,
B4, B5, B6, B7, B8
A1, A2, A3, A4, B1, B2, B3, B4
A1, A2, B1, B2
A1, A2, A3, A4, A5, A6, B1, B2, B3, B4, B5,
B6
A1, A2, A3, A4, A5, A6, A7, A8, B1, B2, B3,
B4, B5, B6, B7, B8
A1, A2, A3, A4, B1, B2, B3, B4
A1, A2, A3, A4, A5, A6, B1, B2, B3, B4, B5,
B6
A1, A2, A3, A4, A5, A6, A7, A8, B1, B2, B3,
B4, B5, B6, B7, B8