Modders run AMD’s FSR 4.1.2 Lite on Intel Arc at near-XeSS speed
An OptiScaler community modification lets AMD’s FSR 4.1.2 Lite run on Intel Arc GPUs using their XMX matrix cores; neither AMD nor Intel officially supports the setup. In community tests cited by VideoCardz, the modded upscaler took 0.59 ms on an Arc B580, close to XeSS at 0.58 ms, while an Arc A770 test in The Witcher 3 recorded 101.5 FPS against XeSS’s 101.1 FPS.
Bottom line — The experimental XMX mod gives Intel Arc users another upscaling option, but game compatibility and image-quality claims remain unverified.
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VideoCardz reports that the B580 comparison used Clair Obscur: Expedition 33 at 1080p with the Balanced preset.
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On the A770, VideoCardz reports upscaling times of 0.75 ms for FSR 4.1.2 Lite and 0.84 ms for XeSS.
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The full FSR 4.1.2 model took 0.85 ms on the B580, compared with 0.59 ms for Lite, according to VideoCardz.
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VideoCardz says users need OptiScaler and modified FSR files; the XMX implementation currently focuses on DirectX 12.
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Hardware Busters notes that compatibility is patchy and reports crashes in Crimson Desert.
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VideoCardz cautions that claims of better image quality are subjective, with no standardised comparisons establishing an advantage.