There is a mining machine G1 miner. There are 8 NVIDIA GTX 1060 3 Gb video cards on it. And, accordingly, the integrated video card. The task is simple, install CentOS 7, run mining with increased memory frequency. In order for each video card minil 25 MH / s. The problem is that in order to increase the memory frequency, the NVIDIA driver for some reason needs an X server.
So, I connect the monitor to the integrated video adapter (Since there is no video output in the video cards themselves). Installing CentOS 7 with KDE. The operating system is loading. But mining cannot be included as there are no drivers for video cards. After installing the drivers from the official site from NVIDIA. It turns out such a picture: 
Further, if I try to create xorg.conf using the nvidia-xconfig utility. That screen will generally turn black until I delete the xorg.conf file.
Please help me understand what I am doing wrong?
