System Memory - Poweredge M805 - Dell PowerEdge M605 Hardware Owner's Manual

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 startup stating that your memory configuration is non-
optimal.
Memory Sparing Support - PowerEdge M905
Memory sparing (spare bank) is supported in systems that have one of the
memory configurations shown in Table 3-2. The memory sparing feature must
also be enabled in the Memory Information screen of the System Setup
program. See "Memory Information Screen" on page 83. To use memory
sparing, you must disable node interleaving.
Table 3-2. Memory Sparing Configurations - PowerEdge M905
Total Usable
System System
Memory Memory
16 GB 12 GB
32 GB 28 GB
64 GB 56 GB
128 GB 112 GB

System Memory - PowerEdge M805

You can upgrade your system memory to a maximum of 128 GB by installing
667-MHz registered DDR2 memory modules in sets of 1-GB, 2-GB, 4-GB, or
8-GB memory modules. (Dual-rank 8-GB modules are supported; quad-rank
8-GB modules are not supported.) Each processor has four memory channels,
organized in sets of two channels.
NOTICE:
memory modules will be downclocked to operate at 533 Mhz.
108
Installing Blade Components
Memory Modules -
Number and Size
Eight 2 GB
Sixteen 2 GB
Sixteen 4 GB
Sixteen 8 GB
If more than four memory modules are installed per processor, the
Memory Module Locations
A1, A2, B1, B2, C1, C2, D1, D2
A1, A2, A3, A4, B1, B2, B3, B4, C1, C2,
C3, C4, D1, D2, D3, D4
A1, A2, A3, A4, B1, B2, B3, B4, C1, C2,
C3, C4, D1, D2, D3, D4
A1, A2, A3, A4, B1, B2, B3, B4, C1, C2,
C3, C4, D1, D2, D3, D4