To @PhoenixMiner!
Dear devs. I do not understand what is happening! But, after some time I again have 21Mh per card on Rig with 8 cards ASUS ROX STRIX GTX-1070 8Gb. So instead of 180Mh per 6 cards, I have 127Mh. Windows 7. Both miners PM 5.3b and 5.4c have the same speed.
Can you comment that somehow? I asked you before that, but still there is no any comments

Just any changes of MC (-mclock) do nothing. Mining speed always like speed with -mclock 0.
Please, answer. Do not ignore.
Thank you.