What power cable does the NVIDIAGeForce RTX 5090 use? The power connector is called 12V-2x6. If you have an ATX 3.0 or higher certified PSU with either a 12VHPWR or 12V-2x6 cable, you are pretty much #NextGenReady! Here are all the supported connection options for 12V-2x6 from our Explorer article: