Valve’s Steam Frame is doing something bigger than putting Steam inside a new virtual reality headset. It is giving SteamOS a serious ARM64 foundation and creating a path for traditional PC games to run on the same processor architecture widely used in phones, tablets and increasingly laptops.

The Steam Frame uses Qualcomm’s Snapdragon 8 Gen 3, an ARM64 system-on-chip, while running Valve’s Linux-based SteamOS. That creates an immediate compatibility problem: much of the existing PC game catalog was compiled for x86 or x86-64 processors rather than ARM. Valve’s answer combines Linux, Proton and another open-source compatibility technology called FEX.

What FEX does

FEX is an open-source binary translation layer designed to run x86 and x86-64 software on ARM64 hardware. Instead of requiring every existing PC game to be rebuilt for ARM, FEX translates processor instructions while forwarding calls to native system libraries where possible. Valve’s Steamworks documentation says it also uses code caching to reduce in-game stuttering.

For Windows games, Proton remains part of the stack. Proton translates Windows software interfaces for Linux, while FEX addresses the processor-architecture mismatch. Valve also supports native ARM64 Linux software and uses another compatibility layer, Lepton, for Android applications.

SteamOS is moving beyond x86

This matters well beyond one headset. Steam Deck helped establish Linux gaming on x86-64 hardware. Steam Frame demonstrates that Valve’s operating system and compatibility stack can also target ARM64 while preserving access to a large existing software library.

Linaro says its engineers worked with Valve on Linux kernel and U-Boot bootloader improvements for the platform, including device drivers, system-on-chip enablement, power management and upstream kernel work. Upstream support is especially important because it reduces dependence on long-lived private patches and makes the underlying Linux work easier for the wider open-source ecosystem to maintain.

The development also connects with BitcoinVersus.tech’s continuing coverage of Qualcomm opening Snapdragon X2 to Linux developers. Both efforts show Linux gaining deeper support across modern ARM computing platforms, from laptops to standalone gaming hardware.

Why ARM compatibility matters

ARM processors have traditionally dominated mobile computing, where power efficiency is critical. Bringing established PC software libraries onto ARM hardware without requiring developers to maintain completely separate versions could widen the hardware choices available to Linux users and game developers.

There are still limits. Binary translation adds complexity, and compatibility or performance can vary from game to game. Valve’s documentation therefore distinguishes between native ARM64 applications, Windows software running through Proton, x86 software translated through FEX and Android software running through Lepton.

The important shift is architectural: SteamOS is no longer tied exclusively to the processor architecture that defined the traditional PC. Steam Frame is providing Valve with a shipping ARM64 platform on which Linux, open-source drivers and compatibility layers can mature together.