The GeForce RTX 20 Super lineup was made public on July 2, 2019, while the first RTX 30-series graphics cards got announced in early September 2020.
The reference RTX 4090 is also rumored to come with a whopping 600W TGP (or more?), while some third-party cards might include two 16-pin power connectors, allowing enthusiasts to push the power limit even higher for overclocking.