[SOLVED] Can u use GPU for ATX on micro-ATX?

Solution
The issue will be whether the card fits into the existing case and if you have the proper PSU for it.

I would not consider this an upgrade aside from VRAM, and would not spend money this way.
beware of matx boards that cannot accommodate gpus with backplates, as the boards ram clips may interfere with the gpu physical installation. I learned this the hard way.