Hello buddies
What video card characteristics is right for 3D designing (Maya) and post production softwares (AE, Ps ...)? I mean: what component of Maya is affected by GPU clock speed ; for working with Maya, what is the difference between 256 bit or 512 bit vga?; what components of Maya (Panit FX, Bifrost, Dynamics ...) is affected by vga ram (GDDR)?
Generally speaking, What components of Maya/AE are affected by what components of VGA? and how much?

thank u in advance