The power supply maker lists Radeon RX 7000 Series in their Wattage Calculator. It shows Radeon RX 7900 XT, RX 7800 XT and RX 7700 XT.
Taken from Videocardz … Seasonic’s wattage calculator which is used to estimate PC power requirements now lists AMD’s unreleased graphics cards from Radeon RX 7000 series, as discovered by SkyJuice. This information could theoretically be based on real information supplied by AMD before the release, but it is more likely to be a placeholder based solely on the company’s predictions.
However, just assuming that this data is based on correct information, the RX 7900XT would require 750W power supply if only GPU was used and 850W with 8-core Ryzen CPU. The RX 7800XT has the same requirements, while the RX 7700 XT would need 100W less power.
Those targets are about the same as the current generation, further suggesting that someone has simply copy-paste’ed SKUs from the previous series.
Source: Videocardz, Seasonic via SkyJuice