This is my first build, last night I did my external build to make sure it boots and I'm already stuck and worried I didn't make the right choice in building instead of buying. I have the MSI 970 gaming motherboard a 750watt power supply 8G of memory, AMD 8320 CPU, that number might be wrong could be 9320 and an evga nvidia gtx 660 video card. First I'm not 100% positive where the power pins are and what I think might be the power pins are not starting it up