https://wccftech.com/intel-wants-to-standardize-the-more-power-efficient-atx12vo-power-connector-for-alder-lake-s-motherboards/

24-pin Power Connector vs. ATX12VO Power Connector (Source: PCWorld)

Almost all motherboards use the classic 24-pin configuration, but Intel wants to make a change for the 12th generation Alder Lake platform. Intel wants to make the ATX12VO power connector the standard on the Alder Lake-S motherboards. In an anonymous tip to Videocardz, a slip outlining the adoption of the ATX12VO power connector for motherboard and power supplies was sent to them.