Power limit- Minimum (71)
Core +50
Memory +650
40-41MH

Electricity consumption from the wall 870 watts, Power supply Silver 80+ (5x2070)
I read on the forums about the problems of these video cards, the solution to the problems was in the BIOS firmware.
With a phoenix miner, these video cards work great, I have not tried other options.
I'm starting to think it's something in the BIOS, too.
Is it safe using phoenix miner? I've nothing against it, but I read that NiceHash cancelled from their list for safety reasons.
As @batsonxl asked, what's your driver version?
Thanks everyone for your help!
Phoenix miner is not available in Nicehash software anymore, even before that it stop working with AMD cards but only recognize NVIDIA graphics cards, you can use phoenix miner as third-party miner software whiteout going through Nicehash