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by throwawaywindev 1706 days ago
I believe they compared it to a ~100W mobile RTX 3080, not a desktop one. And the mobile part can go up to ~160W on gaming laptops like Legion 7 that have better cooling than the MSI one they compared to.

They have a huge advantage in performance/watt but not in raw performance. And I wonder how much of that advantage is architecture vs. manufacturing process node.

4 comments

I am very confused by these claims on M1's GPU performance. I build a WebXR app at work that runs at 120hz on the Quest 2, 90hz on my Pixel 5, and 90hz on my Window 10 desktop with an RTX 2080 with the Samsung Odyssey+ and a 4K display at the same time. And these are just the native refresh rates, you can't run any faster with the way VR rendering is done in the browser. But on my M1 Mac Mini, I get 20hz on a single, 4K screen.

My app doesn't do a lot. It displays high resolution photospheres, performs some teleconferencing, and renders spatialized audio. And like I said, it screams on Snapdragon 865-class hardware.

What sort of WebXR app? Game or productivity app?
Productivity. It's a social VR experience for teaching foreign language. It's part of our existing class structure, so there isn't really much to do if you aren't scheduled to meet with a teacher.
The MSI laptop in question lets the GPU use up to 165W. See eg. AnandTech's review of that MSI laptop, which measured 290W at the wall while gaming: https://www.anandtech.com/show/16928/the-msi-ge76-raider-rev... (IIRC, it originally shipped with a 155W limit for the GPU, but that got bumped up by a firmware update.)
The performance right now is interesting, but the performance trajectory as they evolve their GPUs over the coming generations will be even more interesting to follow.

Who knows, maybe they'll evolve solutions that will challenge desktop GPUs, as they have done with the CPUs.

A "100W mobile RTX 3080" is basically not using the GPU at all. At that power draw, you can't do anything meaningful. So I guess the takeaway is "if you starve a dedicated GPU, then the M1 Max gets within 90%!"