12VHPWR PCIe Extension Cables

The 16-pin PCIe 5.0 12VHPWR connection or the later improved 12V-2x6 version provide 12V power to select high-end graphics cards.

The main bank of 12 pins provides power while the four smaller pins in the row above are used by the GPU to communicate with the PSU about how much power it needs. Despite having 16-pins the new connector is approximately the same size as the old 8-pin PCIe, but can transmit more current, enabling more powerful graphics cards.