Video card has 8+8 pins PCIe power sockets, PSU has 8+6+6 - Super User
24 Pin to 6 Pin PCI-E ATX Main Power Supply Adapter Cable 18AWG For HP Z220 Z230 Workstation
Amazon.com: LeFix Power Supply Cable Adapter ATX 24Pin 24 Pin Female to 6Pin 6-Pin Male Mini 6Pin Connector 12 Inch 18AWG Replacement for HP Z230 Z220 SFF Workstation Motherboard : Electronics
24-Pin ARGB Motherboard Extension Cable - Micro Center
2x6-pin to Dual 6-pin Pmod Splitter Cable - Digilent
Braided ATX Sleeved Cable Extension Kit for Power Supply Cable Kit Purple 6Pcs | eBay
Early Tests Look Promising For New 12V-2x6 GPU Power Connector Even When Not Fully Seated | HotHardware
DA1000R Gold
ATX Power 24Pin To Dual 6+2 Pin 8 Pin With On Off Switch Cable