I have sped lots of time trying to solve the problems that often appear over 4 video cards. The problem of running 6 cards is not so easy. As my experience i would like to share each graphic cards miners also as an electronic is to pay attention to power supply.
First check if power power supply is enough. Pay attention to current on 12V line as its main for you graphic card.
Try to also to distribute all separate plugs equally for all cards.
If a Error 43 appears in system it informs You about possibility of PSU overload by numerous hardware.
To simply solve this problem you have to unlock power limits in registry that this great tool already makes. It’s a pleasure to share this great helpful tool. Such a good work makes the all cryptocurrency believers even stronger.