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An Xbox Series X can now run PlayStation 5 games, but there's a catch

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An Xbox Series X can now run PlayStation 5 games, but there's a catch

What is the PS5X Emulator for Xbox Series X and how does it work?

In a YouTube video that went live on September 8, developer Devran Cosmo Uenal booted the PlayStation 5 version of Quake II on an Xbox Series X and played it with an Xbox controller. But the game was running through PS5X, Uenal's Xbox port of the open-source PS5 emulator KytyPS5, and he has gotten three more PS5 games working alongside it.

The fact that he's managed to get PS5 games running on an Xbox at all is super cool, but there's a catch: PS5X only works in the console's official Developer Mode, where Microsoft's documentation caps games at 5GB of memory. That unfortunately rules out the majority of current-gen games, and there's no public download for anyone else to try yet.

Sony and Microsoft built their current consoles around closely matched AMD hardware. Both of them have eight Zen 2 CPU cores, RDNA 2 graphics and 16GB of GDDR6 memory, and PS5 games are compiled for the same x86-64 processor architecture that PCs use. That means the KytyPS5 emulator can run their code on the host CPU instead of recreating the PS5's hardware in software. Its developer calls it a compatibility layer and, practically, it behaves more like a translator, converting what a PS5 game asks for into something a PC can understand.

KytyPS5 translates the PS5's graphics commands and recompiles its shaders for Vulkan. 3 graphics card on PC, but Xbox Developer Mode only supports DirectX 11 and DirectX 12.


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