Valve Ships Proton 11 Beta 3 With FEX 2605 Upgrade for ARM64 Steam Frame
Updated
Updated · GamingOnLinux · May 13
Valve Ships Proton 11 Beta 3 With FEX 2605 Upgrade for ARM64 Steam Frame
1 articles · Updated · GamingOnLinux · May 13
Summary
Proton 11.0-1 Beta 3 updates FEX to version 2605, giving Valve’s Windows-game compatibility stack a fresh ARM64 Linux boost ahead of Steam Frame.
FEX 2605 adds performance gains for 32-bit and 64-bit games, fixes a controller-related crash, and advances support for Qualcomm’s Snapdragon X2 Elite.
Valve also folded the Beta 3 changes into Proton Experimental, widening early access to the update beyond the standalone Proton 11 beta branch.
The release matters because FEX, alongside Proton and Lepton, is central to running x86 Windows games on the upcoming SteamOS-based Steam Frame hardware.
The update follows other Steam Frame signals, including Unreal Engine 5.8’s experimental support and Qualcomm and Steamworks documentation aimed at developers.