What is the most powerful GPU right now?

As a keen observer of the cryptocurrency and finance landscape, I'm curious to know: What is the most powerful GPU currently available on the market? With the ever-increasing demand for mining cryptocurrencies and the need for high-performance graphics processing, it's essential to stay abreast of the latest developments. I understand that factors such as hashing rate, power efficiency, and cooling capabilities are crucial in determining the overall performance of a GPU. Could you elaborate on which model, based on current specifications, reigns supreme in the world of GPUs for mining and other computationally intensive tasks?