Summary: I have tried two MB and still can not make it work. I used Gigabyte support they were no help. I then took it to Geeks and they could not figure it out. I order a different MB hoping that will solve the issue. I do not know where the issue is at. When you turn on the computer it turn off in about 5 seconds and then turn back on and then back off and just kepts cycling. I have 2 of everything: 2) CPU 2) MB 2) Power supplies 2) cases it is the same with every combination.