not works more than 4 GPU's

[jakobi]

Hi, I try simple os, but I have problems with it.
My rig contains:
Power Color
2x470 8gb, 2x480 8gb and 2x480 4gb
motherboard prime 270-p
Do I need any additional information about the system?

I write image to USB flash drive 8gb
Miner works only for 4 gpu, when I use 5 or 6 gpu's I get an error. Error example in attach.
I also tried to install a patch (beta kernel  4.11). second photo with error after this.
https://ibb.co/gocWMQ
https://ibb.co/m3DhT5