Sorry dude, I only just saw this.
If you want to revert to 18.6.1 and try my PPT table, I'm happy to send it to you.
Just dm me your email address in that case.
I'm using reference Sapphire RX Vega 56 with 64 bios, so the ppt will reflect that.
I had SoC set to 1200 previously and that wreaked total havoc in my cards' behaviour. Always massive pain to get the cards stable, needed to increase core voltages massively and they just behaved erratically. Getting SoC back to 1107 sorted everything.
Dragonmike, PM is sent.
I have another hard disk with installation of miner on win10 1709 with 18.6.1. driver (that system I used until now).
So I can easily test, just boot from another disk ;-)
txs