Going by Corsair, it is the socket on the GPU and PSU that was updated to 12V2x6.
https://www.corsair.com/uk/en/explo...units/evolving-standards-12vhpwr-and-12v-2x6/
Corsair has their cable listed as a 12v2x6 (not sure i can link to it).
You could get a Cablemod cable with 3 x PSU connectors if that makes you feel better/safer.
It looks better than the Corsair and think the wires are thicker.
My basket at OcUK:
Total: £28.94 (includes delivery: £3.99)
Do you mean this one which was linked previously? If this solves my problems and has no flaws to potentially blow up my house then it's probably the option I will take.

Corsair PCIe 5.0 12VHPWR Type-4 PSU Power Cable (CP-8920284)
Order Corsair PCIe 5.0 12VHPWR Type-4 PSU Power Cable (CP-8920284) now online and benefit from fast delivery.
