Thanks!
I found my answer at Vega.miningguides.com last night. Seems these drivers need to be reset every time you boot-up by disabling, and then enabling each card in Device Manager.
Seems they have script to automate that. It did fix it and I was back to 1800h.
Now, I need to find out why when I installed the second card, the computer wouldn't see it!
change the lane speeds to gen 1 in bios and check if the risers are faulty