Hello I was just wondering if it was possible to mix different AMD RADEON GPU on the same rig such as 2 rx570 , 2 5700xt , 1 5500xt and would I need each individual driver downloaded?
Install the latest version of Hive OS or RaveOS and you won't need to download and install anything.
It is better that all video cards have more than 4 GB of memory in order to be able to mine Ethereum. If the video card has 4 GB of memory, then I make a separate farm so as not to mix these video cards with others.