it is extremely important to have a supported GPU, but the actual performance of that card will not make a major impact on performance. Compared to the high-end GeForce RTX 3090, the much more modest RTX 3070 is within a single percent - even when only looking at GPU accelerated tasks. You should at least Have a minimum of 1 GB of VRAM but we recommend you to use 4 GB for a smooth experience.