I got the Corsair 12VHPWR cable to go with my Corsair AX1600i for my 4090. No issues in almost a year of continuous operation.

I love how this is pretty much the only viable upgrade option for the 3080 and it will burn your house down. 5000 series can’t come soon enough.

Could someone explain to me why was this connector necessary?

Gven the size of these cards … just add a third eight pin and call it a day? Most PSUs in the relevant range ship with six anyways…