AMD accidentally uploaded the code for its FSR 4 upgrade technology to GitHub. This leak suggests that a lighter version of the technology may also be supported on older Radeon graphics cards.

FSR 4 technology may be coming to older cards

As previously reported, AMD had only made FSR 4 compatible with newer graphics cards. However, this leak suggests that this may change. The leaked code reveals a lighter, INT8-based version of FSR 4 that will run on Radeon RX 7000 series cards and older.

FSR 4 offers improvements such as smoother texture rendering, less blur, and reduced ghosting at 1440p and 4K resolutions. These improvements bring AMD’s RX 9000 series graphics cards closer to DLSS 3 in terms of image quality.

The leaked lighter version is planned to run on RDNA 2 and RDNA 3 architectures. However, it is currently unknown whether this version has been abandoned in development or will be released in the future.

The performance of the slimmed-down version is not expected to be on par with FSR 4.0. However, modding studies, particularly on the RX7000 series, indicate that FSR 4, despite requiring more processing power, provides better visuals than FSR 3 and surpasses native resolution.

Meanwhile, AMD recently announced FidelityFX SDK 2.0. This developer kit will simplify FSR integration, allowing game developers to add FSR 4 support directly to their games.

FSR 4 can currently be manually enabled in games that support FSR 3.1. However, with the drivers coming with SDK 2.0, both upscaling and frame generation support will be more natively integrated into games. This is all that is currently known about FSR 4. An official statement from AMD is awaited.