Additional power connectors on GTX 780

Solution
Those are PCI-E power connectors. The run from your power supply straight to your video card. That card requires a 6 pin and an 8 pin (6+2) connector, both MUST be connected in order to work properly. Depending on what power supply is in your computer, you may need to upgrade. Especially if it doesn't have any PCI-E connectors, which would make it quite old.

Anub1s

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May 27, 2012
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Those are PCI-E power connectors. The run from your power supply straight to your video card. That card requires a 6 pin and an 8 pin (6+2) connector, both MUST be connected in order to work properly. Depending on what power supply is in your computer, you may need to upgrade. Especially if it doesn't have any PCI-E connectors, which would make it quite old.
 
Solution