But we don't know what Apple is comparing.
In the picture titled "GPU performance vs. power", that is "relative performance" with lower power consumption, so it doesn't say anything about literal performance.
Then there's this:
> In addition, the GPU delivers performance comparable to a high-end GPU in a compact pro PC laptop while consuming up to 40 percent less power, and performance similar to that of the highest-end GPU in the largest PC laptops while using up to 100 watts less power.[2]
Where that 2 points to:
> ... Discrete PC laptop graphics performance data from testing Lenovo Legion 5 (82JW0012US). High-end discrete PC laptop graphics performance data from testing MSI GE76 Raider (11UH-053). PC compact pro laptop performance data from testing Razer Blade 15 Advanced (RZ09-0409CE53-R3U1). Performance tests are conducted using specific computer systems and reflect the approximate performance of MacBook Pro.
82JW0012US on Amazon has a 3050Ti in it
11UH-053 has a 3080 in it
RZ09-0409CE53-R3U1 has a 3080 in it
(edit: formatting)
Certainly there are tasks they can do to skew that one way or another.
Mobile 3080 specs https://www.techpowerup.com/gpu-specs/geforce-rtx-3080-max-q...
fewer teraflops but higher gigatexels, gigapixels
That seems closer to the power consumption they had on their comparison chart.
It's why when Intel moved from the GMA to Intel HD (i.e. "can just about render a desktop" to "can play indie games"), it took years before games even reliably worked on Intel GPUs, never mind performed. Of course once they did it pretty much killed off the budget GPU market.
Even at the high end consumer market, it's why you often find AMD GPUs outperforming cost equivalent nVidia cards for compute use but then falling flat in games.
Apple has the advantage that the big game engines like Unity/Unreal etc. have been targeting their hardware for the mobile support for the last while, so they have arguably a bit of a head start relative to Intel's entry, but I have to imagine they have a catch up to do before they run high end PC games comparably. Probably will run the entire iOS catalogue in 120hz though.