Dell OptiPlex SX280 Serie Guide De Référence Rapide page 14

Connecting a DVI Monitor
If you have a DVI-compatible monitor, plug the cable from your monitor in to the white DVI
display-connector on the computer back panel.
Connecting a VGA Monitor
If you have a VGA-compatible monitor, use the adapter cable to connect the cable from your
monitor to the white DVI display-connector on the computer back panel.
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Quick Reference Guide