Dell PowerEdge R905 - Manual (Page 99)

Installing System Components
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8 Align the memory module's edge connector with the alignment key of the
memory module socket, and insert the memory module in the socket.
NOTE:
The memory module socket has an alignment key that allows you to
install the memory module in the socket in only one way.
9 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.
10 Repeat step 6 through step 9 of this procedure to install the remaining
memory modules. See Table 3-1 or Table 3-2.
11 Replace the cooling shroud assembly:
– If you are installing memory modules on the system board, see
"Replacing the Cooling Shroud Assembly" on page 72.
– If you are installing memory modules on the PEM, see Figure 3-9.
12 Replace the PEM. See "Replacing the PEM or PEM Shell" on page 78.
13 Close the system. See "Closing the System" on page 68.
14 Start up the system, press <F2> to enter the System Setup program, and
check the System Memory setting on the main System Setup screen.
The system should have already changed the value to reflect the newly
installed memory.
15 If the value is incorrect, one or more of the memory modules may not be
installed properly. Repeat step 2 through step 14 of this procedure,
checking to ensure that the memory modules are firmly seated in their
sockets.
16 Run the system memory test in the system diagnostics. See "Running the
System Diagnostics" on page 169.
Removing Memory Modules
CAUTION:
Many repairs may only be done by a certified service technician. You
should only perform troubleshooting and simple repairs as authorized in your
product documentation, or as directed by the online or telephone service and