I have been building a computer for a couple months now and have all the parts except the Graphics Card and SSD. I have connected my power supply connectors to all the proper ports and have tried to power it up. I have a older graphics card in as a replacement in case I need a graphics card in order for the computer to power up. I tried powering it up and nothing happens no power no nothing. I was wondering do you have to connect the PCI-E connectors from the PSU to the graphics card for it to start up? If you know the answer let me know and thanks!