So, I have a XPS 8300. I got a newer AMD radeon 5450 2Gb card. Currently, I have a AMD Radeon 5450 1Gb card. The 1Gb works fine. The 2Gb won't display any video. Either from it or from the mobo display. The 1 Gb and 2Gb card works in an older machine I have, and so I know everything on their own...