That's a reasonable card, not by far the best, but you should be able to run many games with it.
I'm not sure what drivers ubuntu comes with but copy and paste this into a terminal, press Enter, and see if it gives the same result:
glxinfo | grep direct
It should say:
direct rendering: Yes
If not, then I'm pretty sure there exists the proprietary nvidia driver in the ubuntu repo, all you need to do is install it. You will need the 96.43.xx drivers for that card, as it is old.