GTAIII-Unusual Problem

[Map750]

Alas, thank you for correcting me. I remember the person who built/repairs this computer said that it was a Voodoo chipset, I just couldn't remember how to word it. And I am positive that my video card is 16MB video card (the minimum) and I also believe that GTAIII does not run off of the Voodoo chipset. (another thing that the builder says. and he is the one who said I would need a patch). I also have the Athlon Processor. I have an 18 GB hard drive so that isn't a problem,, And I have plenty of RAM... Yet, when I start up the game it says I need 12MB of available video memory. I really want this game to work, so is it something that I could change? Like downloading possibility?