The power supply unit (PSU) converts the electricity received from the wall outlet to direct current and uses that electricity to provide power to the devices installed within the system. The power supply is made up of several rails, each of which provides different levels of voltage to internal hardware. Many PCI Express (PCI-E) cards require power from the 12 volt rail. Older power supplies may not include the 6-pin PCI-E power cable required to provide the necessary voltage to high-powered PCI-E cards, but you can use a converter to make your own 6-pin PCI-E power cable.
- Skill level:
- Moderately Easy
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Things you need
- 6-pin PCI-E power cable converter
Click on "Start." Click on "Shut down." Disconnect the power cable connected to the computer and power outlet.
Remove any other devices attached to the rear of the computer. Push the power button to drain the system board of electricity.
Remove the screws on the rear of the case to loosen the cover. Slide the cover toward the back of the case. Lift off the cover and set it aside.
Touch the computer's chassis to ground yourself. Locate the two 4-pin peripheral cables not currently in use.
Remove the 6-pin PCI-E cable converter from its packaging. Plug the 4-pin peripheral power cables located on the converter into the available 4-pin peripheral cables leading from the power supply.
Connect the 6-pin PCI-E power cable to the power slot on your PCI-E card.
Tips and warnings
- The 4-pin peripheral power connectors, also called Molex connectors, have four cables---two black, one red and one yellow---leading from the connector to the power supply.
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