Earlier quoted context omitted.
i doubt it'll even initialize.
These cards can run idle (e.g. desktop 2D mode) at about 15W, so it might run just fine. Actual power draw depends on monitor resolution, number of attached displays, and refresh rate, though.
Sorry, Apple is clearly lightyears ahead. All they need to do is put out a chip with 48 of their gpu cores and they will beat the most expensive top of the line best ever performance gpu on the market… with a laptop-grade SoC.