^ that PSU is trash and a danger for the system. Go with Antec, XFX, seasonic, EVGA (G2,B2,GS)
That motherboard is junk. It is known to overheat and fail with 8xxx CPUs. Change that for sure.
Get 2x4gb RAM, not a single stick.
Last, that system has no onboard video so you will not have a working PC until you get a GPU
This is why never to buy those PC "kits". ALWAYS put together your own set of parts.