Zuzu
Member
Summary 1 by Krisp AI Summariser (& a couple of small edits by me)
Introduction to FSR 4
- FSR 4 represents AMD's first public venture into machine-learned graphics for consumers, aiming to replace FSR 3.
- Currently, only RDNA 4 GPUs are compatible with FSR 4, excluding earlier AMD GPUs and Nvidia or Intel GPUs.
- AMD emphasizes the INT 8 performance with sparsity, showcasing an RX 970 XT achieving 779 TOPS compared to Nvidia's RTX 390 and RTX 490 with 640 and 1321.2 TOPS respectively.
- The theoretical performance of RDNA 4 GPUs suggests significant machine learning capabilities, which are essential for handling the demanding workload of FSR 4.
Performance Comparison: FSR 3 vs FSR 4
- Initial tests indicate that FSR 4 underperforms FSR 3 by approximately 8% in average performance during a benchmark of the Ratchet and Clank opening cut scene on an RX 970 XT at 4K performance mode.
- The performance gap raises important questions about whether the image quality improvements of FSR 4 justify the performance trade-off.
- FSR 4 is expected to address the significant image quality gaps that exist between AMD and Nvidia GPUs.
Image Quality Improvements in FSR 4
- FSR 4 effectively resolves many of the image quality issues present in FSR 3, particularly with particle effects that previously exhibited ghosting.
- In Horizon Forbidden West, FSR 3's handling of waterfall effects resulted in ghosting across frames, while FSR 4 eliminates this issue, presenting a more dynamic and visually appealing waterfall.
- Transparency effects, such as those seen in water or glass, benefit from FSR 4's capabilities, showcasing improved detail and clarity compared to FSR 3.
- The enhancement in image quality is evident in the increased surface detail of objects with low relative motion, resulting in sharper textures and more defined images.
Anti-Aliasing and Motion Clarity
- FSR 4 introduces superior anti-aliasing techniques, significantly reducing pixelation artifacts compared to FSR 3.
- The stability of detail during motion is improved, leading to less pixel crawl and a more polished visual experience.
- In motion tests, FSR 4 demonstrates a marked improvement over FSR 3, showcasing clearer and more stable imagery in dynamic scenes.
- The transition from FSR 3 to FSR 4 results in a noticeable reduction of disclusion fizzle and pixelated edges, which were significant issues in previous versions.
Comparative Analysis with DLSS
- When comparing FSR 4 to Nvidia's DLSS CNN model, FSR 4 shows advantages in image stability and anti-aliasing, particularly in static or low-motion scenarios.
- FSR 4 achieves similar sharpness to DLSS's older CNN model, but it surpasses it in stability, reducing flickering and stair-stepping on moving edges.
- However, when compared to DLSS's Transformer model, FSR 4 falls short in detail resolution and edge stability, indicating areas for improvement.
- In terms of performance, FSR 4 performs approximately 20% worse than the DLSS CNN model, but it maintains competitive image quality.
Final Thoughts on FSR 4
- Despite being technically behind in image reconstruction, AMD has made significant strides with FSR 4, providing users with a compelling alternative to FSR 3.
- FSR 4 not only offers improved image quality but also positions AMD GPUs as viable options for gamers seeking high-quality graphics.
- The advancements in FSR 4 suggest a promising future for AMD's image reconstruction technology, with potential for further evolution akin to Nvidia's DLSS.
- Overall, FSR 4 represents a noteworthy development in AMD's graphics technology, enhancing the gaming experience significantly.
Summary 2 by Claude Language model (via GizAI website)
- FSR 4 Overview:
- AMD's first public machine-learned graphics tech.
- Aims to replace FSR 3.
- Initially supports only RDNA 4 GPUs.
- Technology & Performance:
- Leverages int8 performance with sparsity.
- RX 970 XT: 779 TOPS.
- RTX 3090: ~640 int8 TOPS (with sparsity).
- RTX 4090: 1,321.2 TOPS (with sparsity).
- PS5 Pro: ~300 TOPS (presumably with sparsity).
- RDNA 4 GPU boasts impressive ML performance.
- FSR 4 is performance intensive.
- RX 970 XT @ 4K, FSR 4 ~8% slower than FSR 3 (parity settings).
- Benchmark: Ratchet & Clank opening cut scene.
- Image Quality Improvements:
- FSR 4 addresses FSR 3's image quality issues.
- Particle effects: FSR 3 ghosting eliminated in FSR 4.
- Transparencies: FSR 4 improves water surface detail.
- Low relative motion objects: FSR 4 boosts surface detail, contrast.
- Anti-aliasing: FSR 4 reduces pixelization artifacts, improves stability.
- Complex motion: FSR 4 resolves issues of disclusion fizzle in FSR 3.
- FSR 4 vs. DLSS:
- FSR 4 exceeds DLSS CNN (older model) in some static image quality aspects.
- FSR 4 has better image stability (less aliasing) than DLSS CNN.
- DLSS Transformer model resolves more detail than FSR 4.
- DLSS Transformer shows less aliasing than FSR 4.
- FSR 4 detail/anti-aliasing between DLSS CNN and Transformer models.
- FSR 4 better than DLSS CNN in motion.
- DLSS Transformer sometimes adds unwanted striations.
- Performance Comparison (GPUs):
- FSR 4 ~20% worse performance than DLSS CNN (RTX 3070 Ti vs RX 970 XT).
- Image quality similar between FSR 4 and DLSS CNN.
- RX 970 XT only 5% slower than RTX 3070 Ti (DLSS Transformer).
- FSR 4 has image quality concessions vs. DLSS Transformer.
- Pricing and Final Takeaways:
- AMD GPU ($150 cheaper MSRP).
- AMD technically behind in image reconstruction.
- FSR 4 huge advancement, great image quality on AMD GPUs.
- FSR 4 obliterates FSR 3.
- FSR 4 better than older DLSS in key areas.
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