Review on 🔌 Aideepen 2 Port PCIe Expansion Card with 4-Pin & 20 Pin Control Card Adapter - USB 3.0 PCI Express Controller Hub for Windows by Paul Zimmer

Doesn't seem like a problem. For older PCs this is a great product. But unless you have something new, you won't have Molex connectors in your computer. I'm a computer engineer, this is why it happens on an old computer. However, most buyers will be unaware of the actual connectors available on their power supply. I felt it needed to be said. If you have a new computer, get one that doesn't require this connection. If your PC is a few years older than 5+, this might work for you. check your connections.