FSX mainly uses shader 2.0 while all 3.0 related stuff are modifications to it (which are recommended of course).
So it isn't really the feature set of your card holding you back but the pure performance of it could well be too low.

Unless you have a really powerful CPU there, this won't be much fun as the card is very old and never was a performance model but one to "just show some graphics".

What's the rest of the system then? If it fits to the age of the card, FSX sadly isn't an option here I think.


And by the way, you've posted in the 707 related sections of these forums, so don't be surprised if the moderator moves your thread.