It looks like the rumor is accurate as someone discovered there's a placeholder on AMD's website for the Radeon RX 500X series. At the moment, we have no further details.
AMD PLZ.https://t.co/tFSvZp3wJC@anthony256 @TweakTown look to be right pic.twitter.com/tssVdXvYol
— ???? (@GRbUF8qUqYB4iPy) April 8, 2018