I have comment for my message.
My hardware is brand new it has 2 weeks:
G.Skill Flare X DDR4, 2x8GB, 3200MHz, CL14 (F4-3200C14D-16GFX)
After 10 hours memtestx86 memmory have 0 Errors
Płyta główna Gigabyte AX370-Gaming K3 Newest Bios F22
Everthing looks good but under heavy load on Linux Ubuntu 16.04.3 Sometimes it freezes programs sometimes crash the machine.
Computer run on Windows 10 64 home with 2 - 4 VM Linuxes all on stable 16.04 Versions.
My procesor is not overclocked.