The "Type 4 Sleeved black PCIE" cable from Corsair with the product ID CP-8920143 is a 6+2 pin PCI Express cable. However, the Corsair RM850x from 2018 does not use Type 4 cables as standard. Typically, older models are compatible with Type 3 cables. It is important to check the specific cable compatibility of your power supply to make sure the cable will fit. If you are unsure, you can contact Corsair support or consult the documentation for your power supply.