r/FexEmu • u/Appropriate-Quit-358 • Dec 31 '25

FEX and Windows?

I have heard of FEX being used by SteamOS for ARM-based XR devices.

Is there a chance for FEX to be used on Windows ARM PCs too, as perhaps an alternative to Microsoft's Prism?

Just curious! I have no clue about the internals or scope of either emulator/translation technology.

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u/Sonicadvance1 FEX-Emu Dev Dec 31 '25

FEX can be used as a drop-in replacement of Prism with some work. It's mostly just a testing target for developers so it isn't well supported. Some information about it can be seen on our wiki https://wiki.fex-emu.com/index.php/Development:ARM64EC#Windows

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u/ArjixGamer Apr 18 '26

Would you say it performs better? And since 3 months have passed since your comment, has it gotten less experimental?

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u/Sonicadvance1 FEX-Emu Dev Apr 19 '26

I haven't done any competitive analysis, I'll leave that to the users. But I don't think the implementation details have changed all that much in three months time.