Looking into a similar issue right now, a few Vega rigs are having init issues it seems. Just to collect some more data for me, what cpu do you have in that rig? Also, I assume you know you have enough swap enabled?
I have Intel Celeron G3930 @ 2.90GHz. I'm not sure what swap is, but if it means virtual memory then yes. I set virtual memory to 60000 MB.
SRBminer cnr works with the same settings.