I want to know what type of grapjic card dell

You can use a graphics card, instead of the integrated graphics.
The GX280 Desktop supports a PCI Express x16 Video Card.
The Maximum memory supported, is
Small desktop computer, 4 GB
Desktop computer, 4 GB
The GX280 specifications and service manual is http://support.dell.com/support/edocs/systems/opgx280/en/ug/index.htm
let me know how that work for you and please do not forget to rate my service so we can improve on it with your help. God bless

My apologies to 'GURU'
The question is very simple and straight - "which graphic card is used by Dell Optiplex gx280".!
Answere is simple - Onboard Intel Extreme graphic!!
How does PCI Exp 16 and max supported memory (4/6 GB) comes in