Graphics card 6 pin and 8 pin connectors explained. 6 pin power connector can supply 75 watt to the graphics card while 8 pin power connector can deliver maximum of 150w to your graphics card.

On 7674 Pcie To Molex Power Adapter Wiring Diagram Wiring
Molex to 6 pin pcie wiring diagram. Pci express 6 pin to molex power. I need to connect my pci express card to the psu but it doesnt have a 6 pin connector on it. Its okay to plug a 6 pin pci express power cable into an 8 pin pci express connector. Some video cards come with the 8 pin pci express power connector to support higher wattage than the 6 pin pci express connectors. I needed to make a working adapter for a mac pro with the stuff i had laying around as the connector that came with my gpu didnt work with the gpu. I have a 6 pin connector off of an old.
Its designed to work that way but will be limited to the lower wattage provided by the 6 pin version of the cable. Buy adapters or power converter cables for 6 pin pci e and 8 pin pci e connectors. Posted in internal hardware. These high power cards draw most of their power from the 12 volt rail so this cable provides only 12 volts. A graphics card with one 8 pin power connector can get maximum of 225w of power 75w from pci express x16 slot and 150w. This connector is used to provide extra 12 volt power to pci express expansion cards.
Many video cards draw significantly more than 75 watts provided by the motherboard slot so the 6 pin pci express power cable was created.