Acceleration in that era was about 2d drawing, most of the time for desktop env. Completely uninteresting for 3d games like Doom. Probably uninteresting for even 2d games unless the acceleration in question support direct sprite rendering (like video game consoles)
e.g.:
> By 1991 ATI was selling dedicated GPU cards that worked independently from the CPU. By enhancing the gameplay of titles like 1993's "Doom"
Hm I'm sorry, what???