Intel Arc B580 on SteamOS Delivers Solid 1440p Gaming, XeSS Still Hobbled
YouTuber ETA Prime tested the Arc B580 on SteamOS and found strong game performance across multiple titles, but Intel's XMX hardware acceleration for XeSS remains unsupported by the Mesa driver.
A Penguin That Actually Runs on Blue
For a while, getting an Intel Arc GPU to behave on SteamOS required a fair amount of patience and a tolerance for experimental driver flags. That era appears to be ending. According to a new video from ETA Prime, the YouTuber widely known for his deep testing of gaming handhelds and SteamOS hardware, the Intel Arc B580 now boots on Valve’s Linux-based operating system cleanly, no special workarounds required. That is genuinely good news for anyone building or buying a SteamOS device that is not AMD-centric.
As reported by TechPowerUp, ETA Prime put the B580 through a range of games at 1440p, and the results were mostly encouraging. The card handled Cyberpunk 2077 at high settings with XeSS 2.0 in Quality mode, landing frame rates between 75 and 90 FPS. Horizon Zero Dawn Remastered at high settings with XeSS on balanced produced 62 to 73 FPS, which ETA Prime described as basically identical to Windows performance. Elden Ring ran at a very stable 60 FPS at native 1440p with maximum graphics, no upscaling needed. Fallout 4 at ultra settings hit 60 FPS with room to spare.
Forza Horizon 5 told a slightly different story. At 1440p and high settings without upscaling, the B580 managed 75 to 85 FPS with occasional dips into the 60s. ETA Prime noted that the same configuration on Windows runs in the mid-80s, which means SteamOS is leaving a bit of performance behind in that particular title. It is a gap worth watching, but not a dealbreaker for a platform still maturing its support for non-AMD hardware.
The XeSS Problem Is Real, But Specific
Here is where things get complicated. The Mesa driver that SteamOS relies on does not currently support Intel’s Xe Matrix eXtensions, the dedicated XMX hardware inside Arc GPUs that makes XeSS run the way it is supposed to. XeSS can technically execute on SteamOS, but without XMX acceleration, both image quality and performance take a hit compared to a proper Windows installation. More significantly, XeSS Multi-Frame Generation is completely disabled in this configuration.
For a GPU where XeSS is one of the headline selling points, especially as Intel continues pushing XeSS 2.0, this is a notable limitation. The good news is that it is a software problem, not a hardware one. Mesa driver development is an active, community-driven process, and Intel has been contributing more aggressively to open-source graphics stacks over the past couple of years. XMX support is not a permanent dead end; it is a gap that someone will eventually close.
In the meantime, the games that lean heavily on XeSS for performance headroom will not show their best on this platform. Titles that run well natively at target frame rates, like Elden Ring and Fallout 4, simply sidestep the issue entirely.
What This Actually Means for SteamOS
Valve has been straightforward about the fact that its own Steam Machine hardware uses AMD silicon. But the company has also been consistent about keeping SteamOS open enough for other vendors and users to do as they please with it. The B580 situation is a small but clear sign that this philosophy has real engineering effort behind it.
As TechPowerUp noted in their writeup, SteamOS has made significant progress getting GPU vendors beyond AMD running and gaming. Intel Arc cards work now, in a way that feels like a first-class experience rather than a science project. A user in the TechPowerUp comments section pointed out that Intel Arc support already extends to handheld hardware as well, noting they run SteamOS on an MSI Claw with a second-gen Lunar Lake chip.
The B580 is a capable mid-range card that punches well at 1440p. On SteamOS, most of that capability comes through intact. Getting XMX support into Mesa would take an already solid showing and make it genuinely competitive, especially for users who bought into the Arc ecosystem specifically for XeSS. Until that driver work lands, the B580 on SteamOS is a real option, just not the full version of one.
Does the Intel Arc B580 work on SteamOS without workarounds?
Yes. According to testing by YouTuber ETA Prime, the Arc B580 now boots on SteamOS without the workarounds or experimental support that were previously required.
Does XeSS work on the Arc B580 under SteamOS?
XeSS technically works, but quality and performance both suffer because the Mesa driver used by SteamOS does not support Intel's XMX hardware acceleration engines. XeSS Multi-Frame Generation is completely disabled as a result.
What frame rates did the Arc B580 achieve on SteamOS at 1440p?
In ETA Prime's testing, Cyberpunk 2077 at high settings hit 75 to 90 FPS with XeSS 2.0 Quality mode, Horizon Zero Dawn Remastered reached 62 to 73 FPS at balanced XeSS, Forza Horizon 5 at high settings hit 75 to 85 FPS with occasional dips to the 60s, and both Fallout 4 and Elden Ring ran at a stable 60 FPS with headroom remaining.
How does SteamOS performance compare to Windows on the Arc B580?
ETA Prime noted that Horizon Zero Dawn Remastered performance was basically identical between SteamOS and Windows, while Forza Horizon 5 runs in the mid-80s on Windows versus 75 to 85 FPS on SteamOS, suggesting SteamOS leaves some performance on the table in that title.