Computer Graphics card (G21 balornock)

Hi hope someone out there can help, I am trying to build a computer for 3d graphic design on the cheap, I now cobelled small set up and have found that it is the graphic card that is now holding me back and keeps crashing the computer, I am wanting to use fusion 360 and the min spec is 2gb vram graphics, so looking for graphic card instead of using the internal one
Many thanks in advance mike