If you are within your 30 days..then YES you can return it for anther Video Card.  I don't know if they have the 9600 XT, but, if they do then it would be a DELL 9600 XT.  Not a Retail version.  I ended up keeping my FX 5200 and buying a Retail ATI card.  I am happy with the new card. It works beautifully.

As for the FX 5200, I gave it away to a good friend who has helped me many many times on my systems over the years.  A small price to pay.  I do know that they have a ATI 9600 pro 128 meg on sale at CompUsa for $149.99.

Dimension 4600
2.8 GHZ 800 FSB
1.5 GB PC 3200 DDR Ram
80 GB HD
60 GB External Fire Wire HD
ATI 9800 PRO 128meg
P991 19" Monitor
DVD/CD-RW
CD-RW
Floppy Drive(A must have for a old timer)
5.1 SB Audio
Added Firewire card
A stoopid modem I didn't want

I don't think Dell carries the 9600 series. However, they do have the 9800 Non-Pro, which is only a $100 premium over the Dell FX5200 and is a much more powerful card compared to the 9600XT. It's by far Dell's best deal on video cards.

They will not exchange video cards or any other internal part of the system anymore, unless it's like for like, as I just experienced this. I ordered w/ the FX 5200 and decided I wanted the 9800XT ( within 30 days of course). I told them I would gladly pay the difference, their response: We no longer have this policy, you may return the system and reorder, so that's what I did.