I had a voodoo3 2000 AGP that could not play Giants worth a cr@p. 640x480x16 was slow to say the least, while games like UT played well. I sold my v3 2k for $71, bought the v4 4500 at OD for $79.88 plus tax, and it is a much much faster card. Twice the memory, super stable, and it allowed me to play Giants at 1024x768x16 at pretty smooth framerates.
Now I have a Radeon 64 DDR and it blows both away. At any rate, to end my useless talking, yes, the 4500 is an upgrade
Joe