Dell OptiPlex 9020 (Mid 2013) - Manual (Page 18)

• Memory modules of different sizes can be mixed (for example, 2 GB and 4 GB). But, all populated channels must
have identical configurations.
• Memory modules must be installed beginning with the first socket.
NOTE: The memory sockets in your computer may be labeled differently depending on the hardware
configuration. For example, A1, A2 or 1,2,3.
• If the quad-rank memory modules are mixed with single or dual-rank modules, the quad-rank modules must be
installed in the sockets with the white release levers.
• If memory modules with different speeds are installed, they operate at the speed of the slowest installed
memory modules.
Removing the Memory
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove the cover.
3. Press down on the memory retaining tabs on each side of the memory modules, and lift the memory modules out of
the connectors on the system board.
Installing the Memory
1. Align the notch on the memory-card with the tab in the system-board connector.
2. Press down on the memory module until the release tabs spring back to secure them in place.
3. Install the cover.
4. Follow the procedures in After Working Inside Your Computer .
Removing the System Fan
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove
a) cover
b) optical drive
c) drive cage
d) front bezel
3. Disconnect the system-fan cable from the system board.
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