OldComputers

I have some olds pc taken from an old industry (because the bought new ones and they gave me gratis) but they dont works . they are all old components. the motherboard is an old model the Power supply entry have only 20 pins intead of 24 like the next series of mobo i tried differents ram...

My computer randomly shuts off and i cant seem to solve why. The manufacturers have sent Me replacments for ,cpu,gpu,psu,ram and the mother board but still same problem randomly shuts off and then starts itself back up again. My systems specs are: Motherboard: Asus maximus viii hero, Cpu: Intel...