Same error here.

Setup:

- ASRock B150A-X1
- 5x Sapphire rx480 Nitro+
- 250gb hdd (had some left)
- rm1000x 1000watt
- 4gb ddr4
- intel pentium G4400
- (windows 10)

Using 1x to 16x powered risers right now, will be using usb 3 risers next week.

I have my rigs (3) running with only 3 cards now untill there is a solution. I hope someone can help us!!

edit: Just got 4 cards to work, dont know how/why.