Hello guys, I'm kinda noob and planning on building my first rig.
The thing is I'd like to mix different GPUs. Is it possible? What is happening then about the drivers?
I can't find online good answer to this question (most answers are outdated, some says it's impossible, some that it is completly possible and that I can even mix Nvidia and AMD GPUs, some that I can but only if there is one driver beeing good for all the GPUs, like the same driver for 580 and 570)

I'm looking for an actual answer before buying things!

Concretely, I would like to put starter rig with one AMD R9 390 and two AMD RX 580. Is it possible? If yes, how do I manage the drivers? (and also, wouldn't the mix up make me lose too much hashrate?)

Thanks for your answers! I'm completly lost about this one!