This is an ATX3.1 PC power supply unit, an error has probably crept into our specifications.

Thank you for pointing this out, we will have the error corrected and ATX3.1 entered.

The Corsair RM850x includes the following cables: a 20+4 PIN ATX power connector, two 4+4-pin 12V connectors, three 6+2-pin PCI Express connectors, eight 15-pin SATA connectors, three 4-pin Molex connectors, and one 16 Pin PCIe 5.0 connector. These cables are designed to provide broad compatibility with modern graphics cards and motherboards. The PSU is fully modular, allowing you to connect only the necessary cables.

Hello gogobidouille, I don't think your cable (Corsair Premium Cable 12+4 pins-12VHPWR-600-W for PCIe Gen 5 with single jacket) from your digitech link is compatible with this power supply and your AMD 7900 XT graphics card. Normally, the end marked "Type4" should be connected to the power supply and not to your graphics card, even if the 12+4 pin at the other end does exist on the Corsair RM850 v. 2024 power supply. However, I can tell you that if you buy this Corsair RM850x v. 2024 modular power supply, there are 2 cables with 8 pins on each side (the graphics card side is even a 6+2, which increases compatibility with other less powerful graphics cards).