PC won't post after troubleshooting

michaelaomahony

Commendable
Dec 14, 2016
1
0
1,510
Usually I wouldn't need to ask but something is strange about my system which makes it not POST, I've tried many different components but nothing seems to make it POST.

CPUs: AMD FX-8320, AMD FX-6100
Motherboards: MSI 970-G43, Gigabyte 78LMT-USB3
GPUs: GTX 660, 9400 GT, GeForce 210, Onboard Graphics
PSUs: EVGA 500W 80+, Q-Tec 550W Gold, Dell OEM 275W PSU
CPU Fan: Arctic Alpine Pro 64 Plus
RAM: 1x8GB, 1x4GB

I've tried many different monitors, all the components are completely new except for the Dell PSU, I tried booting out of the case and components and wires were all properly seated! I have no idea what to do next. Thank you in advance.