Dell Studio XPS 8100 (Late 2009) - Manual (Page 34)

3. Align the notch on the bottom of the memory module with the tab in the connector.
4. Insert the memory module into the connector until the memory module snaps into position.
If you insert the memory module correctly, the securing clips snap into the cutouts at each end of the memory module.
5. Replace the computer cover (see Replacing the Computer Cover ).
6. Connect your computer and devices to electrical outlets, and then turn them on.
If the message appears stating that memory size has changed, press to continue.
7. Log on to your computer.
1 matched memory modules in DIMM
connectors 3 and 4 (black securing
clips)
2 matched memory modules in DIMM
connectors 1 and 2 (white securing
clips)
1 cutouts (2) 2 tab
3 notch 4 memory module
CAUTION: To avoid damage to the memory module, press the memory module straight down into the connector while you apply equal force to
each end of the memory module.
1 cutouts (2) 2 securing clip (snapped in position)