Thanks a lot, for you guide.
I tryied to do it step by step. Three times. But had no succsesfull.
First difference is - after install Ubuntu (ubuntu-16.04.2-desktop-amd64), when I enable nvidia driver first time, I already have last version of nvidia drivers. I can't install 367.57 . Is it ok?
After install nvidia drivers I can open nvidia settings, but i don't know where to do to "And X Server Configuration and save the configuration file. " I tryed to reboot and after that I can see temps, fans rpm, clock of gpu's.
So then, when I disabled nvidia driver and enabled Nouveau driver, I start to install last nvidia driver one more time. One time I had error that because of enabled Nouveau driver, it can not install nvidia drivers. Is my job right?
After succesfull instalation cuda (without drivers) I tryed to overclock gpu, and have a lot of eerors. Failed to connect to Mir: Failed to connect to server socket: No such file or directory. Unable to init server: Could not connect: Connection refused. I tryed to install mir, but it was a bad idea.
What am I doing wrong? Can you give me some help?
Guide is pretty old. It super-simple now

These are the steps are now:
1) install Ubuntu 16.04LTS or 17.10LTS
2) Update the Operating System via
Software Centre. REBOOT
3) Go to
Additional Drivers and switch the the CPU drivers, if not automatically loaded. REBOOT
4) Go to
Additional Drivers and switch too Nvidia Drivers. REBOOT
5) Open a Terminal and enter each line:
sudo update-grub
sudo nvidia-xconfig -a --cool-bits=28 --allow-empty-initial-configuration
REBOOT
Fans control and overclocking is now enabled.
Amended the 1st page, which explains how to set up automatics fan speeds and overclocks.