Dell OptiPlex GX280 - Manual (Page 83)

1 memory connector closest to processor
2 securing clips (2)
3 connector
3. Align the notch on the bottom of the module with the crossbar in the connector.
1 cutouts (2)
2 memory module
3 notch
4 crossbar
NOTICE: To avoid damage to the memory module, press the module straight down into the connector while you apply
equal force to each end of the module.
4. Insert the module into the connector until the module snaps into position.
If you insert the module correctly, the securing clips snap into the cutouts at each end of the module.