I had a slightly old (3 year old) PC that needed an 8 pin PCI-E power connector for a new Asus RX570 GPU that I just installed. (I didn't realize this requirement until I installed it). This allows two unused SATA power connectors from the PSU to power the GPU's fans. The fit works well - I wish the wires were a bit longer so I didn't have to redo the way the power cables are routed through the case; but that's a very minor complaint. Works great, now I go to the races.