minimum GPU requirement: how bad can it be?

Hi! So I've read that there isn't really a minimum GPU requirement since most GPUs can be used to mine ravencoins and therefore I'm thinking about using my old pc that I'm not using anymore. The problem is that it has a sapphire Radeon hd5670 which is probably 10 (or more) years old and I don't know how bad this is. What do you think? Is there someone here who's mining with some really old gpus? Thanks