Silly question. Don't you have to use the card the Motherboard was made to use. ATI card now, don't you need to replace with ATI card? Now I know the newer Intel CPU boards can be both but I'm not seeing it with old boards.

So my point is. Why offer Nvidia options for an ATI board. Unless I have that wrong and that only has to do with using SLI and Crossfire.

Graphic cards are cheep now days for a good jump in upgrade. $50 bucks can get a much bigger card than you already have with supported drivers.

I use a Nvidia GTX 260 core 216 and happy with it. But that seems a bit big for what you need and may not even fit in your system. That's something else to think about. Will the card fit in your case. Higher end cards may not be what you want either. Lets not forget Power Supply. Can your PSU handle a bigger card.

The last question would be. Is it worth it to put money into a new card without upgrading your system first.

Been there, done it and still doing it right this minute with one of my other computers.