Yes, I assumed they would disable some CPU cores and clock lower if they used the Magnus CPU SOC for handhelds. Regardless, AT4 is pretty much for Laptops and Handhelds.
PS6 Canis has four Zen 6C CPU cores.
Xbox Ally X with the Z2X AI has 8 Zen 5 or Zen 5C cores. It has a 50 TOPS NPU. It's not that far off from the Magnus CPU. If Sony can disable a CPU core in the Orion, MS could probably disable at least one of the Zen 6 cores in Magnus if they were to use on handhelds.
I think MS will recommend Asus to make device slightly bigger for next gen handhelds, by doing 8" screen, so they have better room for cooling. Kepler stated that the handhelds would be using 28 Watts at least vs 15 Watts Canis.
GPD Win 5 shoved a 45-65 watt Laptop chip in their handheld. But that relies on external battery. Had they simply made device bigger, they likely could've kept both.
Also, not sure if Magnus has a Pluton security chip, probably does, that is probably what will ensure Console library BC and FC on devices with Magnus.
You should read this thread from beginning.
Don't care for power kings as like the past Xboxes were and look where it got them. BoM alone forces MS hand to either heavily subsidize or price it hundreds of dollars more, both are really bad for HW troubled Microsoft.
AND hell yeah secret sauce will most definitely help here, the more specialized PS6 is the more it will punch above what's on paper specs, like PS5 but even better because Sony is half defining AMD's roadmap here beyond the proprietary solutions it will include in the system.
PS5 was similarly weaker on paper in many aspects against Series X but it ain't just...
"I don't see how PS6 can match Magnus, it has fewer CPU cores, lower CPU frequency, fewer CUs, fewer ROPs,
lower GPU frequency, less cache and memory bandwidth. It's not a huge difference but Magnus should have better performance in 100% of games unlike this gen where it's more of a 50/50."
It's going to be a Console, NOT PC. The Xbox PC is a different form factor. So don't expect it to be simply a PC with XFSE. It will still look and function like a console even if it runs full windows.
The Xbox OS shell and Console UI/UX, running GDKX optimized Console games. The PC games are in addition to that. It's about PC/Console Convergence, not replacement of the Console form factor.
Easy route is to simply run Xbox OS as a subsystem of the full windows running underneath. The windows would be explorer less so expect no Desktop mode or File System Access on the Console.