Dell PowerEdge C6220 Hardware Owner's Manual page 213

Figure 3-55. Installing a Memory Module
1 memory module
3 memory module socket ejector (2)
4 Replace the air baffle for 1U node. See "Installing the Air Baffle " on
page 145; Replace the expansion card assembly for 2U node. See
"Installing the Expansion Card for 2U Node" on page 162.
5
Replace the system-board assembly. See "Installing a System-Board
Assembly" on page 143.
2 alignment key
Installing System Components | 213