AMD on FSR 4 for RDNA 3 and Older GPUs: “No Updates to Share at This Time.”
AMD’s FSR 4: A Future of Upscaling for All Radeon GPUs?
AMD’s FidelityFX Super Resolution 4 (FSR 4) has arrived, promising improved image quality and performance in games. However, its rollout hasn’t been universal across the AMD Radeon GPU family. While fully supported on the latest RDNA 4 architecture, the question remains: will older GPUs get to experience the benefits of FSR 4?
The RDNA Architecture Divide
The current situation stems from AMD’s architectural choices. RDNA 4 GPUs boast support for 8-bit floating point instructions, specifically Wave Matrix Multiply Accumulate in FP8 format. Older RDNA 3 and RDNA 2 generations lack this hardware capability. This difference is a key factor in AMD’s product segmentation, reserving advanced features like ray regeneration and radiance caching – part of the “Redstone” suite – exclusively for the Radeon RX 9000 series.
INT8: A Potential Path for Older GPUs
Despite the hardware limitations, a path forward exists for older Radeon GPUs. These GPUs can utilize 8-bit integer (INT8) data formats, and the Radeon RX 7000 series fully supports them. Interestingly, AMD accidentally leaked FSR 4 INT8 code on its GPUOpen platform, revealing that implementing FSR 4 on older hardware is technically possible.
Testing by ComputerBase demonstrated that this leaked FSR 4 INT8 library offers a compelling balance between native image quality and the performance of FSR 3.1. In 4K with Ultra settings in Cyberpunk 2077, using an RX 7900 XTX, FSR 4 delivered 11% faster performance than native resolution, though it was 16% slower than FSR 3.1.
Why the Hold-Up? Performance and Product Strategy
The existence of a functional INT8-based FSR 4 raises the question: why hasn’t AMD officially released it for older GPUs? Performance is likely a significant factor. The 16% performance difference compared to FSR 3.1 suggests that the INT8 implementation isn’t as efficient. However, product separation – maintaining a clear distinction between generations – also plays a role. AMD already segregates features, reserving the most advanced technologies for its newest hardware.
Did you know? AMD’s initial FSR 3.1 fallback for older GPUs demonstrates a willingness to provide some level of upscaling technology across its product lines, even if it’s not the latest and greatest.
The Leaked Code and Community Efforts
The leaked code has spurred community efforts to backport FSR 4 to older GPUs. TechPowerUp forums have seen discussions among RX 7000 series owners experimenting with the leaked implementation. This demonstrates a strong user desire for access to the latest upscaling technology, regardless of their GPU generation.
Future Outlook: Will AMD Budge?
While AMD currently has “no updates to share” regarding official FSR 4 support for older GPUs, the existence of the INT8 version and the ongoing community efforts suggest that a release is not entirely off the table. The decision will likely hinge on balancing performance considerations with its product strategy. If AMD can optimize the INT8 implementation to deliver acceptable performance, it may choose to extend FSR 4 support to a wider range of GPUs.
FAQ
Q: What is FSR 4?
A: AMD’s FidelityFX Super Resolution 4 is the latest upscaling technology designed to improve performance and image quality in games.
Q: Which GPUs currently support FSR 4?
A: Officially, FSR 4 is supported on GPUs based on the RDNA 4 architecture (Radeon RX 9000 series).
Q: Can older Radeon GPUs run FSR 4?
A: A leaked INT8 version of FSR 4 has been tested on RDNA 2 and RDNA 3 GPUs, but official support is currently unavailable.
Q: What is INT8?
A: INT8 refers to 8-bit integer data format, which older Radeon GPUs can process as an alternative to the FP8 format used by RDNA 4.
Q: Where can I find more information about FSR?
A: Visit the official AMD GPUOpen website: https://gpuopen.com/amd-fsr-upscaling/
Pro Tip: Keep an eye on community forums like TechPowerUp for updates on unofficial FSR 4 implementations and user experiences.
Stay tuned for further developments as AMD continues to evaluate the potential of bringing FSR 4 to a broader range of Radeon GPUs. What are your thoughts on AMD’s approach? Share your opinions in the comments below!