Hi guys, one question, i have 6 rx580 8g doing 1050hs in CN Heavy . It's stable, without memory erros and etc. But when dev fee starts hashrate drops to 800/900+ and stays instable and after some 1 hour+ all cards stays at 1050 again. Wich could be the problem? Or is that a normal?

Thanks

Edit:

I'm using { "id" : x, "intensity" : 58, "worksize" : 16, "threads" : 2}, for all.

It's happening now:

http://i.imgur.com/P9GRh2r.png