Alleged NVIDIA GeForce RTX 4090 Ti FE Cooler Design Breaks Cover And It's A Beast
The cooler design in these renders is based on the GeForce RTX 3090 cooler with modifications inspired by the leaked images from China. Essentially, it's the GeForce RTX 3090's cooler extended to 3.25 slots. Such a thing sounds impractically heavy to us, and would essentially require a stand in any tower case, but it does sound like quite a potent GPU cooler.
Alternatively, the leaked images could be completely fake. MLiD discusses that possibility as well as the likelihood of an entirely different cooler being used for the final retail product in his video, which you can view on YouTube.