[SOLVED] Motherboard only powers on when cpu 8 pin power connector is plugged out

[Fire Emblem Trash]

I had decided to start my new pc build today. Oddly, my pc only powers on when the cpu power cable is plugged out. I am not sure if it is the fault of the motherboard or the cpu. I know for a fact it is not the power supply because i used the same supply in a different pc and it works fine. I have tried checking for a minor short circuit (plugged in outside the case). That did not work. I an using a 9700k processor and a z370 msi gaming plus motherboard

 

[Darkbreeze]

Make sure you are using the CORRECT 8 pin or 4+4 pin connector. It should be designated as the EPS 12v connector. You cannot use the 8 pin PCI connector meant for graphics cards in the 8 pin EPS socket.

 

[Fire Emblem Trash]

Make sure you are using the CORRECT 8 pin or 4+4 pin connector. It should be designated as the EPS 12v connector. You cannot use the 8 pin PCI connector meant for graphics cards in the 8 pin EPS socket.

The cord I am using from my power supply is indeedthe one designated for the cpu power. it has a label that says cpu.

 

[Darkbreeze]

I would take it all back apart and check to see if there were any pins bent during the installation of the CPU. THAT is the most likely cause of your problem.

The pins will be located on the motherboard for this Intel platform.