I'm a noob when it comes to power supplies and its connectors and such. I got a new motherboard and graphics card and installed it. My power supply is a 2 year old 600 watt thermal take. The Gtx 780 requires 2 8 pin pci connectors which my psu doesnt have. It haves 2 6 pin conectors. But the graphics card came with 2 8 pin connectors that use 2 4 pin connectors each. So i used those. My mother board is a gigabyte z77 ds3h. Well basically my pc wont power on and im thinking its a power supply problem?