The Complete Wiki to AMD FidelityFX Super Resolution 4 (FSR 4)

🎮 The Complete Wiki to AMD FidelityFX Super Resolution 4 (FSR 4)

What is FSR 4?

AMD FidelityFX Super Resolution 4 is AMD's machine learning powered upscaling technology, designed to reconstruct high resolution, high quality images from lower resolution rendered frames. It marked AMD's shift away from purely mathematical upscaling toward a neural network based approach, closing a long standing quality gap with Nvidia's DLSS.

FSR 4 marks a significant leap forward from its predecessor, FSR 3, by integrating machine learning techniques into its upscaling process, achieving substantial improvements in image fidelity and sharpening finer details with remarkable precision.

How is FSR 4 different from FSR 3?

The core difference is the underlying method. FSR 3 relied on analytical, non ML upscaling algorithms, while FSR 4 uses a neural network trained on high quality ground truth game data, generated using AMD's own Instinct GPUs. That training process is what allows FSR 4 to reduce ghosting on moving objects and eliminate artifacts around disoccluded surfaces (areas newly revealed as something moves), problems that were consistently visible in FSR 3 output.

Which GPUs support FSR 4?

FSR 4 launched exclusively for AMD's RDNA 4 architecture, specifically the Radeon RX 9000 series GPUs, since only that architecture includes the AI acceleration hardware needed to run the neural upscaling model.

• RDNA 4 (RX 9000 series): Full native FSR 4 support since launch
• RDNA 3 (RX 7000 series): FSR Upscaling 4.1 support began rolling out starting July 2026
• RDNA 3.5 and RDNA 2 (RX 6000 series, integrated GPUs like the Radeon 680M/890M): Support falls back to analytical FSR 3 style upscaling, with full RDNA 2 rollout targeted for early 2027

This staggered rollout addressed real criticism AMD faced, since Nvidia's DLSS had continued supporting older GeForce hardware while RDNA 3 and RDNA 2 owners were initially left without any ML based upscaling path at all.

What is FSR Redstone?

FSR Redstone is the umbrella suite AMD introduced alongside FSR 4, bundling several ML powered technologies together rather than shipping upscaling as a single standalone feature.

🖼️ 1. FSR Upscaling → Reconstructs high quality frames from lower res input
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🎞️ 2. FSR Frame Generation → Predicts and inserts new frames for higher FPS
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💡 3. FSR Ray Regeneration → Restores full ray traced detail from sparse samples
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🌐 4. FSR Radiance Caching → Predicts real time global illumination lighting

Under this suite, "FidelityFX Super Resolution 4" as a name has effectively been folded into the broader "FSR Upscaling" branding, with Redstone representing the full technology stack rather than upscaling alone.

How many games support FSR 4?

Game support has scaled dramatically since launch. FSR 4 supported around 30 titles at launch alongside the RX 9000 series, and that number crossed 300 supported games by 2026, with the sharpest jump, from 85 to 200 titles, occurring in the final quarter of 2026 alone.

How do I enable FSR 4 on my GPU?

FSR 4 isn't automatically active by default on supported RDNA 4 hardware. It needs to be turned on at the driver level first.

⚙️ 1. Open AMD Software → Navigate to the Gaming Graphics menu
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✅ 2. Enable FidelityFX Super Resolution 4 → Toggle the feature on for supported titles
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🎮 3. Launch a supported game → Confirm FSR is enabled in the in game graphics settings
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🔍 4. Check status via overlay → The AMD Software overlay confirms if FSR 4 is Active

This process uses AMD's "Upgradeable FSR API," which allows FSR 4 to activate in games that were originally built only with FSR 3.1 support, without requiring a separate game patch.

Is FSR 4 coming to consoles?

Yes. Sony and AMD have been collaborating under a joint initiative called Project Amethyst, aimed at bringing FSR 4 style upscaling to the PlayStation 5 Pro to boost its graphical output using the same machine learning approach developed for PC.

FAQ

Does FSR 4 work on Nvidia or Intel GPUs?
No. FSR 4 is built specifically around AMD's own RDNA 4 hardware acceleration, and its ML based path is exclusive to AMD graphics cards.

Is FSR 4 better than DLSS?
Independent testing generally shows FSR 4 closing much of the previous quality gap with Nvidia's DLSS, though exact comparisons vary by game and specific DLSS version being compared against.

Will FSR 4.1 fully match native FSR 4 quality on older GPUs?
RDNA 3 and RDNA 2 support relies on scaled versions of the technology with analytical fallbacks, so while quality improves significantly over FSR 3.1, it's optimized around RDNA 4's dedicated AI hardware, meaning results may not be fully identical across generations.

✅ Final Takeaway

FSR 4 represents AMD's most significant upscaling shift to date, moving from analytical math to genuine machine learning, and the expansion from 30 to over 300 supported games in a single year shows how fast that transition has scaled. With backward compatibility now extending to RDNA 3 and RDNA 2 hardware, and console integration underway through Project Amethyst, FSR 4 has moved well past its RX 9000 series origins into becoming AMD's core upscaling standard going forward.

For full technical documentation and driver level details, see AMD's official FSR Upscaling page on GPUOpen and TweakTown's coverage of FSR 4's 300+ game milestone.