Valve's New Proton 11 ARM Beta Gets Hollow Knight: Silksong Running Past 100 FPS on the Ayn Odin 2 Portal

Key Takeaways

• Proton 11 beta adds FEX‑2604 for ARM64EC translation
• Hollow Knight: Silksong runs >100 FPS on Ayn Odin 2 Portal
• Rocknix Linux enables native Steam on Snapdragon‑based handhelds
• Valve’s move hints at future ARM‑based Steam hardware like Steam Frame
• Anti‑cheat and stability remain challenges on ARM translation layer

Pulse Analysis

Valve’s Proton 11 beta marks a pivotal shift for Linux gaming by bundling the open‑source FEX‑2604 layer, which translates x86 instructions to ARM64EC binaries. This integration removes a major technical barrier that has long confined Windows‑only titles to x86 hardware, allowing developers and enthusiasts to experiment with ARM‑based platforms without rewriting code. The beta’s release on GitHub also invites community contributions, accelerating compatibility testing across the sprawling Steam library and setting a foundation for future official ARM support.

The performance showcase on the Ayn Odin 2 Portal illustrates the practical impact of this software advance. Running on a Snapdragon 8 Gen 2 processor—retailing for roughly $433—the handheld delivered over 100 FPS in Hollow Knight: Silksong on its 120 Hz screen, while Half‑Life 2 topped 120 FPS and Cuphead hovered in the 60‑70 FPS range. Rocknix, a Linux distro tailored for retro‑gaming handhelds, provided the native ARM Steam client, turning the device into a true portable PC gaming machine. Similar tests on the Ayaneo Pocket S2 and Konkr Pocket Fit confirmed the stack’s scalability, though microSD‑based installations revealed slower download speeds, highlighting early‑stage usability considerations.

Strategically, Valve’s quiet rollout hints at a broader ambition to diversify the Steam ecosystem beyond the x86‑centric Deck. Industry chatter links the ARM effort to the rumored Steam Frame VR headset, expected to leverage Qualcomm’s upcoming Snapdragon 8 Gen 3. While anti‑cheat integration and occasional crashes—such as The Witcher 3 failing to relaunch—remain hurdles, the demonstrated frame rates suggest a viable path for cost‑effective, high‑performance ARM handhelds. As developers and hardware makers adopt the Proton‑FEX stack, the market could see a surge in ARM‑based Steam devices, reshaping the competitive landscape for portable gaming and expanding Valve’s reach into emerging form factors.