Thank you very much for helping me Mattthev! I'll fallow your advice like I did with your guides.
Can you help me with my big problem, please? My RIG freezes or restarts from time to time...sometimes after 1 day, sometimes after 7 days... And I can't find out what is the problem...
You all have a good day!
Oh sorry, it was too long, I just read few parts only

I would say core voltages are too low for that clocks. Also check if you have memory errors.