PC Won't Power on After Installing CPU and Power Supply

Book915

Reputable
Jan 6, 2016
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0
4,510
Hi guys,

So I just recently bought an A10-6800K to upgrade my A4-6300. However, I also needed to upgrade my 350W power supply in order to put in my CPU. So I bought an Apevia 450W ATX-XG450W. I replaced the CPU, and then the power supply. But the system won't turn on. I've noticed that it does power on if I have only have the main 24-pin connector in. I don't know what's the problem. My only guess is that it's a low quality PS that can't power the whole system, even though it should.
I also have:
4GB DDR3 1333
MSI GTX 750
Gigabyte F2A55M-HD2
Seagate 1TB

thanks :)