In a surprising twist for the world of PC gaming, Valve’s latest iteration of SteamOS is showing measurable performance advantages over Windows 11 on the Lenovo Legion Go S handheld gaming PC. Nearly a decade after early Linux-based SteamOS builds fell behind Windows in benchmark tests, Valve’s refined SteamOS 3.7 now appears to be edging out Microsoft’s long-standing gaming platform, at least in this new portable hardware battleground.
A Tale of Two Operating Systems
Back in the mid-2010s, Valve’s attempt to shift gaming from Windows to Linux via the Steam Machines and SteamOS 1.0 was hampered by poor game compatibility and disappointing performance. Games ported to Linux often ran significantly slower than on Windows, despite using the same hardware.
Fast forward to 2025, and the scenario looks dramatically different.
The Lenovo Legion Go S, a powerful gaming handheld launched with dual OS compatibility, has emerged as a litmus test for the modern SteamOS. When benchmarked by Ars Technica, SteamOS 3.7 consistently outperformed Windows 11 across a variety of demanding titles, a signal that Valve’s investment in Linux gaming via Proton, Vulkan, and their own Steam Deck hardware is finally paying dividends.
Benchmarking the Battlefield
The test conducted by Ars Technica involved five popular 3D titles released within the last five years. These games were tested at both medium and high graphics settings, using built-in benchmarking tools for consistency.
SteamOS ran these games on the Legion Go S with noticeably higher frame rates compared to Windows 11, sometimes by margins of up to 15–20%. Key improvements were seen in loading times, shader compilation stutter reduction, and general smoothness in gameplay.
After installing Windows 11 and loading the same games via Steam, testers updated all drivers using Lenovo’s support platform. Despite this, the Windows version lagged a reversal of what was once considered an immutable performance hierarchy.
Valve’s Quiet Triumph
SteamOS’s recent performance bump isn’t just a win for open-source enthusiasts; it’s a major milestone for Valve, whose commitment to Linux gaming has often been questioned. With technologies like Proton (a compatibility layer that allows Windows games to run on Linux), Vulkan APIs, and continued support from AMD, SteamOS has matured into a legitimate contender in the gaming OS space.
What makes this even more significant is that Valve’s OS is now optimized not just for its own Steam Deck but also third-party hardware like the Legion Go S, the first AMD-based handheld outside Valve’s ecosystem to officially support SteamOS.
What This Means for Gamers
For PC gamers who have long defaulted to Windows, this may mark a turning point. SteamOS offers faster boot times, less OS bloat, tighter Steam integration, and now, better performance in some cases. On battery-powered handhelds where efficiency matters, these gains are even more impactful.
While Windows still holds advantages in game compatibility (especially for older or niche titles) and third-party software support, Valve’s Linux gaming future no longer looks like a side project. It’s quickly becoming a viable and perhaps superior gaming platform.
Looking Ahead
The real test will be whether more manufacturers follow Lenovo’s lead and embrace SteamOS as a first-class citizen on gaming hardware. If this trend continues, we could witness the beginning of a serious shift away from Microsoft’s gaming monopoly on PC, one handheld at a time.
