Dell PowerEdge M605 - Manual (Page 105)

Installing Blade Components
105
3 Check that these cover-release latch is fully open, and lower the cover onto
the enclosure.
4 Close the cover-release latch until it is flush with the surface of the cover.
System Memory
System Memory - PowerEdge M905
You can upgrade your system memory to a maximum of 192 GB by installing
up to twenty-four 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:
If more than four memory modules are installed per processor, the
memory modules will be downclocked to operate at 533 Mhz.