Review on 🔌 COMeap (2-Pack) GPU VGA PCIe 8 Pin Female to Dual 2X 8 Pin (6+2) Male PCI Express Power Adapter Y-Splitter Extension Cable 9.4-inch: Enhance Your Graphics Card Performance with Reliable Power Delivery by Richard Lamptey

I used this to run graphics cards. I was very concerned that the pin headers would not match or work with my power supply. It works great. But seriously, see if your PSU connectors match. It took a while to get this working and if you're going to buy an extra cable for your build you want to make sure you buy the right cable the first time. There weren't many other 8-pin female connectors like this one. split but from 2-3 on this site I recommend this one.