Nobody has yet mentioned the elephant in the room, namely that this connector isn't part of the ATX specification. The whole point of that spec is to guarantee that if you buy an "ATX PSU", you know exactly what type of connectors you can expect it to come with. This throws all of that out the window, now you'll have "ATX+12-pin PSU"s. Which consequently means anyone can start adding whatever goddamn connector type they think the industry will support, you end up with a plethora of connectors outside the spec, and choosing (and marketing) a PSU becomes a nightmare.
tl;dr vendors randomly adding arbitrary power connectors is a bad thing for everyone concerned, which is one of the primary reasons the ATX specification exists.
As such, unilaterally introducing a new power connector outside the ATX spec would be an extremely foolish move by NVIDIA. Even if they feel that the current 6- and 8-pin connectors are suboptimal, if they want to replace or augment those connectors then they must do so via the standard. Anything else is Apple levels of hubris that will only end poorly.
This is not even getting into the possibility of Intel revoking ATX certification for Ampere GPUs and any PSUs that decide to include this connector - because Intel would be entirely within its right to do so.
As such, I see the possibility of this connector being introduced with Ampere as low. Much more likely is that NVIDIA is prepping it for inclusion into an upcoming revision of the ATX specification, and obviously that will entail sending it out to PSU manufacturers in order to get their feedback, hence the leaks.
Alderpere?
