1.No need to replace the power supply, just connect to the current PCI-E 3*8Pin module cable to convert to 12+4Pin cable, 5 PCIE extension cable designed according to the new generation standard, no signal loss, Supports data link speeds of 32GT/s ,twice the speed of PCIe 4.0. 2.The sleeved cable mod 12pin adapter is design for RTX 3090 PCIE graphics card and supports 3090Ti and new generation graphics card 40 series. 3.High quality Excellent stability, use UL1007 standard cable, high specification wire easily handle your ultra highpower power supply, perfect for 500W - 1300W PSU. 4.Cable manufactured with 16AWG wires and come in a high-density flexible protective sleeve. 5.The cable extension measure 30cm in length and equipped with combs for a clean cable management and a uniform design.