Dell POWEREDGE M915 - Manual (Page 207)

Installing Blade Components 207
Dual-Processor Memory Configurations
CAUTION: Memory module blanks must be installed in unoccupied memory
sockets to maintain proper cooling airflow.
Table 3-12. Dual-Processor Memory Configurations – PowerEdge M605
Total
System
Memory CPU1 CPU2
A1 A2 A3 A4 B1 B2 B3 B4
2 GB 512 MB 512 MB blank blank 512 MB 512 MB blank blank
4 GB 512 MB 512 MB 512 MB 512 MB 512 MB 512 MB 512 MB 512 MB
4 GB 1 GB 1 GB blank blank 1 GB 1 GB blank blank
6 GB 1 GB 1 GB 512 MB 512 MB 1 GB 1 GB 512 MB 512 MB
8 GB 1 GB 1 GB 1 GB 1 GB 1 GB 1 GB 1 GB 1 GB
8 GB 2 GB 2 GB blank blank 2 GB 2 GB blank blank
12 GB 2 GB 2 GB 1 GB 1 GB 2 GB 2 GB 1 GB 1 GB
16 GB 2 GB 2 GB 2 GB 2 GB 2 GB 2 GB 2 GB 2 GB
16 GB 4 GB 4 GB blank blank 4 GB 4 GB blank blank
24 GB 4 GB 4 GB 2 GB 2 GB 4 GB 4 GB 2 GB 2 GB
32 GB 4 GB 4 GB 4 GB 4 GB 4 GB 4 GB 4 GB 4 GB
64 GB* 8 GB 8 GB 8 GB 8 GB 8 GB 8 GB 8 GB 8 GB
*If 64 GB of memory is installed, the system recognizes only 63.75 GB during POST.