Don't just use one click timing patch. It copies the 1625 strap to the other straps including the 1500 one. I got just over 2000MHz with that. By manually selecting and copying the slightly looser 1750 strap to the 1875 and 2000 straps I was able to stably hit 2175MHz and a higher hash rate of 15.5MH/s on an RX560. So best to experiment to see which one gives the best result.