Dell POWEREDGE R805 Hardware Owner's Manual page 118

6 Align the memory module's edge connector with the alignment key on the
memory module socket, and insert the memory module in the socket.
NOTE:
install the memory module in the socket in only one way.
Figure 3-25. Installing and Removing a Memory Module
1 memory module
3 socket
7 Press down on the memory module with your thumbs while pulling up on
the ejectors with your index fingers to lock the memory module into the
socket.
When the memory module is properly seated in the socket, the ejectors on
the memory module socket align with the ejectors on the other sockets
that have memory modules installed.
8 Repeat step 3 through step 7 of this procedure to install the remaining
memory modules.
9 Replace the memory cooling shroud. See "Installing the Processor Cooling
Shroud" on page 96.
NOTICE:
Overheating of the system can develop quickly resulting in a shutdown of the
system and the loss of data.
118
Installing System Components
The memory module socket has two alignment keys that allows you to
1
4
Never operate your system with the memory cooling shroud removed.
3
2 memory module socket ejectors (2)
4 alignment keys (2)
2