OK that card is beyond old, but since this is a hold over machine there is no harm in using it.
All dedicated video cards have several distinct advantages over an IGP, they are:
-dedicated video memory (it wont use your system ram)
-good 2d acceleration (windows desktop is faster)
-better 3d acceleration, with exception to the newest of the ati and nvidia igps, dedicated cards will always have better performance.
-higher resolutions supported.
so stick that puppy in the agp slot and it will have to do while we build you a new pc.