No, it's not true.Is it true that the more VRAM the GPU has, the more/better colors will show up on the screen? I heard someone say it before and wondering if it's true.
Or well, back in the days when you had say 2MB graphics memory maybe you couldn't run the highest resolution at 24 bit so you had to use say 8 bit.. But well, noone have 1-2MB vram longer so no, not true ;D