bios settings

I am experiencing some strange behaviour with a new GIGABYTE X570 AUROS Pro, bundled with Ryzen 3900x stock speed (no overclocking). Case is well ventilated, but using the AMD cooler that comes with Ryzen 3900x. 32Gb RAM, Corsair RM650 80 Plus Gold Modular power source. Gigabyte GTX 1060 6GB...