i bet you got SLI enabled in radeon settings turn it off. Most the times on boot up you will see one vega with green light
Green? I though that was yellow (actually I'm color blind). I'll check on radeon setting then. I use 4 vega and 2 rx 570. That problem already solved when I change mem from 975 to 950. Do you know about the 1st vega problem, can not enable after disable?