Sorry for late reply, been super busy, totally forgot to check back in.I've updated my drivers, and the animations seem to be running smoother and at a higher framerate, but are still just as slow.
Sadly, I can't reproduce this issue at all. It might very well be that RPG Maker behaves oddly with some specific hardware combinations... I'm sorry but I don't know how to solve this...
That's totally okay, I understand completely that problems like this occur, I'm used to it. No worries, and thank you so much for trying to help!