Hi! I use Maya 2017 to create 3D animations and it crashes or lags very very often when the size of my animation gets to be too big. I want to buy a GPU to speed up the process and make modelling, rigging, animating, rendering etc smoother and faster, but don't want to buy a GPU that I will have to install into my computer. Thus I was wondering can I possibly use an external GPU with my Dell OptiPlex desktop and if so, which one would be the best to use? Thank you!!