x2 6 pin Female PCI-e GPU Power Connector Socket - Black + 12 Pins | eBay
PCI-Express Gen5 12-pin power cable looks just like NVIDIA's - VideoCardz.com
Amazon.com: Fasgear PCIe 5.0 GPU Power Cable Sleeved 70cm, 16pin (12+4) 12VHPWR Connector for RTX 3090 Ti 4070Ti 4080 4090, 3x8pin(6+2) PCI-e Male Plugs Compatible for ASUS EVGA Seasonic Modular Power Supply : Electronics
Nvidia 12pin, PCIe 5.0 GPU power connector and interoperability - HWCooling.net