Amphenol has confirmed that a new GPU power connector standard is on its way, replacing conventional 8-pin and 12-pin ones. The 12VHPWR will be capable of delivering up to 600 W to next-generation GPUs too, possibly starting with the NVIDIA GeForce RTX 3090 Ti.
https://www.notebookcheck.net/Next-generation-AMD-and-NVIDIA-GPUs-may-adopt-a-PCIe-5-0-power-connector-for-up-to-600-W-TDPs.571295.0.html