I’ve installed yesterday a new mainboard (Gigabyte GA-970A-DS3P (Rev. 2.1)) to a PC. Since then, if I want to restart Windows 10 (64 bit), the PC turns completely off and turning on again automatically. It’s not comfortable for the HDD. Never experienced this before. Is there any BIOS option responsible for this? I tried to find it out, but found nothing 
I’ll hope anyone has a clue I could try out 
Thank you!
Hello, maeybe try this modified bios, I have this motherboard and everything works fine:
[OFFER] Gigabyte GA-970A-DS3P rev2.x BIOS Mod NVME Added