Just a heads-up for everyone...

[classicdrogn]

Check to make sure your motherboard supports that first - IIRC both companies' versions of that required some extra hardware as well as BIOS support. And of course the amount of power your PSU can in fact supply. Both obvious things until you forget them... or perhaps after.

e: Again with my own RX580, I was quite surprised to find, upon checking, that it can nominally draw up to 280w full-out. Not that I use graphics-intensive software often, since Blender and folding@home don't want to work with it and I rarely play games, never the cutting edge ones, but still. That's more than half the total rated system power.