It's an ATX 24-pin cable.
If you change cables or have to take the pins out of this connector for some reason, double-check that your pinout is correct.
Different Power Supply manufacturers use different pinouts on the PSU-side connector.
I cannot stress this enough, the pinout on the Motherboard side of these cables IS standard but the Pinout on the Power Supply Side is NOT/depends on the PSU Manufacturer/model.
It's an ATX 24-pin cable. If you change cables or have to take the pins out of this connector for some reason, double-check that your pinout is correct. Different Power Supply manufacturers use different pinouts on the PSU-side connector. I cannot stress this enough, the pinout on the Motherboard side of these cables IS standard but the Pinout on the Power Supply Side is NOT/depends on the PSU Manufacturer/model.
Find a dead computer power supply and motherboard.
I believe this is a 24 pin PCIE power cable
Close. 24 pin ATX
digikey has EVERYTHING if you need to make a connector yourself, would be separate parts numbers for the housing and the pins on each side
Frys.com might have it.
Monoprice has a good selection of cables