There's a point you're all completely missing. CPU connectors for the motherboard are 4 pin or 8 pin. PCI-E power connectors are for graphics card and are either 6 or 8 pin. The 8 pin CPU and 8 pin GPU connectors have completely different wire arrangements and different shaped plastic housing. They are not compatible with each other.
typically these have 4x12V and 4xGND from the EPS that combine into a 6pin PCIe connector. problem is they are oftem made with thin wires