Nvidia has announced the 4090, 4080 16GB, and 4080 12GB. The 4080 12GB should actually be called the 4070 since it has less ram and cores then the 4080 16GB.
Ether way the new 4000 series, at least for the 3 that have been paper launched, will need ATX 3.0 power supplies as they require 12 pin + 4 data pins With 4 data lines it allows the PSU and GPU to communicate and know how much power needs to be delivered. Without those lines, it can only provide 450W. Also note that the plug from the PSU has a life cycle of around 30 plug and unplugs before it should be replaced.
So even with a 1000 watt PSU that you have a 4000 series card would only be able to pull 450w because you dont have the 4 data pins. While data sheets are saying the 4080 12GB is only a 285w card, as long as it stays cool and there is power available the card will boost well past that number.
Its like intel saying that your cpu 12700kf is 190w but during boost hits around 280w. Only time will tell what these cards will actually pull in wattage numbers