CableMod RT-Series PRO ModFlex 8-pin PCI-e Cable for ASUS / Seasonic / Phanteks (600mm) – CableMod Global Store
Amazon.com: TeamProfitcom PCI-e 8 Pin Male to Dual 8 Pin (6+2) Male PCI Express Power Adapter Cable for EVGA Modular Power Supply Cable for Graphics Video Card 8 pin Splitter 25+10 inches : Electronics
Corsair Modular Cable 600W PCIe 5.0 12VHPWR Type 4 PSU Power Cable Dual 8pin to 16pin PCI-e Gen 5.0 Suppport RTX3090Ti RTX4090 - AliExpress
StarTech.com Power Adapter Cable PCI Express 6 Pin 8 Pin PCIe Connect a standard 6 pin PCI Express power connection on the Power Supply to 8 pin ATI and NVidia video cards - Office Depot