Hello all,
Yesterday I have posted this question in other thread, but unfortunately I got no advice, so I am trying here today. I am getting very frustrated with my 2 Saphire VEGA64 cards and castXMR setup . The problem is that one of my cards just stops hashing after 1-6 hours (randomly) and miner freezes. I am getting no errors reports in CastXMR or wattman at all. The miner seems to be active and is reporting hashrate for one card. When I am trying to use command "q" to quit it does not react. I have to close it's window and them my wattman setting resets. I am using blockchain driver and applied 1050 registry mod. I also lowered power limit to -21% and GPU. Temperature is below 50 celsius. Please give me some ideas/hints what can cause this problem. I spent several days reinstalling my system and it seems that nothing works

Dont use wattman or amd driver tools.
First follow the guide vegamining.blogspot.com. If this doesnt help then test your cards one by one. Could be that one card needs other settings or is faulty.
Hi, what is your mobo?
I had the same problem and it was caused by the asrock h110+. Such a piece of junk if you want to use it with vegas...
New mobo asus mining expert did the job and rig with 8x vegas mining nonstop for 8days for now...
Before that I had a crashes and freezing of miner 2-4x times per day...