Does it make sense to mining x16rt on RX550?
The current state of the Wildrig miner is not going to give you enough hash per watt to make it worthwile.
Hell, even underclocked Vegas can't mine x16rt profitably currently.
It's due to architectural design of the AMD cards, but also the lack of miner optimisations.
Hopefully Andru will find some time to give the x16 family some love at some point