Intel Arc handhelds running SteamOS have been leaving performance on the table, and a pair of community projects may have just picked it up. In a new video on the ETA PRIME channel, ETA Prime gets Intel's XeSS upscaler running on the chip's dedicated XMX engines inside SteamOS, plus XeSS Frame Generation, on an MSI Claw 8 EX. His numbers are big. The method is unofficial. Both things matter.
Why XeSS was stuck in second gear
XeSS has two ways to run. Tom's Hardware explains that it can use DP4a instructions to run its neural networks as a fallback path where Intel's XMX cores aren't available, while on Intel Arc GPUs, XMX delivers better efficiency and performance thanks to dedicated matrix acceleration. Think of XMX as the purpose-built lane and DP4a as the general-traffic lane that gets you there slower.
According to ETA Prime's video description, Intel Arc handhelds on Linux and SteamOS have been stuck running XeSS in that DP4a fallback mode on the standard GPU cores, with no access to XeSS Frame Gen at all. He walks through why that held Arc back before getting into the fix.
What he actually did
The fix is two community projects, both linked in his description: a patched driver from an XeSS-on-Linux GitHub repository, and ClawDeck, a Decky plugin for SteamOS. ETA Prime sets up ClawDeck, which his chapter list says also handles TDP and a 30 to 120Hz VRR fix, then turns on XeSS on XMX, Frame Gen and Xe Low Latency per game.
The test machine is the MSI Claw 8 EX with Intel's Arc G3 Extreme and Arc B390 integrated graphics, running at 30W TDP, per the description.
The numbers he got
The headline result is Cyberpunk 2077. ETA Prime's chapter for it lists 48fps in DP4a mode, 56fps with XeSS on the XMX engines, and 113fps with Frame Generation switched on. That last jump is frame generation doing the heavy lifting, so it's smoothness rather than raw responsiveness: generated frames aren't the same as the game actually running faster underneath.
He also runs Forza Horizon 6, comparing FSR 3 Performance against XeSS Balanced on XMX, The Witcher 3 at 1080p Ultra with 2x Frame Gen, and Hogwarts Legacy at 1200p Medium, where his chapter title claims 100-plus fps with 3x XeSS Frame Gen. Last up is Marvel's Spider-Man 2, pitting the game's built-in FSR 3.1.4 against XeSS on XMX.
All of those figures are ETA Prime's, from one handheld and one driver build. Treat them as a strong signal, not a guarantee for your setup.
Before you try it yourself
This is a community workaround, not an Intel or Valve release. You're installing a patched driver and a third-party plugin from GitHub, so the usual rules apply: know how to roll back, expect updates to break things, and don't do it on a device you can't afford to have misbehave for an afternoon.
The comment section, as of six hours after upload, is mostly hyped, with plenty of people asking the obvious follow-ups: does it work on older Arc handhelds, on desktop Arc cards, or in Windows? A few want to know how bad frame generation latency feels, and one or two reckon other upscaling mods are less of a faff. Those are fair questions the video doesn't fully settle.
Still, the bigger point lands. The hardware in these handhelds was always capable of more than SteamOS was letting it do, and the community has found a way to open that lane up. If Intel or Valve make it official, Arc handhelds get a lot more interesting as SteamOS machines. Until then, it's a promising experiment for tinkerers who know what they're getting into.
From the creators
Watch the video
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