My new PC which I build 3 weeks ago is shutting down itself very strange. It's working fine, but shuts down itself every 5-6 days and doesn't reboot. After I press the power button to power it on it works fine like nothing ever happened. Everything is brand new except the GPU which I borrowed from my old PC. It's not overheating, all temps are fine.
i7 6800K
Corsair H110i GT
Asus ROG Strix x99 Gaming
Corsair Vengeance LPX 4x4GB 3200MHz Quad Channel
Samsung 850 EVO 500GB
Seagate Barracuda 3TB
Sapphire R9 270X 4GB
NZXT H440
EVGA SuperNOVA P2 850W
i7 6800K
Corsair H110i GT
Asus ROG Strix x99 Gaming
Corsair Vengeance LPX 4x4GB 3200MHz Quad Channel
Samsung 850 EVO 500GB
Seagate Barracuda 3TB
Sapphire R9 270X 4GB
NZXT H440
EVGA SuperNOVA P2 850W