I have an RX580 Sapphire Nitro at 28Mh/s and 85W at the wall with platinum PSU and 220v input. On a small undervolt, 950 IIRC. I'm out of town at the moment but I can send you my firmware when I get back (9/14)
Why do people mine in windows? Is it just because they don't know linux? Everyone is always bitching about instability and i'm just like
Thanks man, i managed somehow to get around 29.6 mhs and running pretty stable now. Just need to tweak the voltage now.