Thanks for the info. Is there a list of cards that have the switch? I am looking to build a new Ryzen system but will slowly buy the parts and upgrade as I go. I am looking to buy a new RX580 first and use it in my current system.
It should work, but I had 290 card on that motherboard and boy, that was a nightmare. Some heavy loads were fine (Battlefield 4), but on medium load games like Diablo 3 it crashed frequently. Something to do with the chipsent and PCIe power states / AMD PowerTune.