Hello, today i have finished to assembling my pc

Cpu: Amd Thrradripper 1950X
Ram: TridentZ RGB
Gpu: Titan Xp
Psu: 1250W Grandplous+ RGB 80 titanium TT
Custom Loop EkWb


First pc has started and after 1 second has shouted. When i changhed the ram slot now the pc start but give me this error

Error 68: Check Cpu

Helpppppppp