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2w ago

Modders Bring AMD FSR 4 to Older Radeon GPUs, Trading Frames for Sharper Images

Community builds from the brief source release run on Windows and Linux, with setup requiring an older driver plus roughly 10–20% losses on RDNA 2.

Make games look loads better on your old AMD Radeon GPU with this new FSR 4 mod
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FSR4 enabled on RX 6000 cards via leaked AMD files

Overview

  • Tests on a Radeon RX 6800 XT running Stellar Blade show FSR 4 improves image quality but lowers performance by about 10–20% versus FSR 3.
  • The unofficial method swaps FSR 4’s FP8 path for INT8 via custom DLLs and tools like OptiScaler to operate on RDNA 2 and RDNA 3 hardware.
  • Guides describe using AMD driver 23.9.1, after which the mod has been reported to work on both Windows and Linux.
  • Reports note visual gains across cards, including RDNA 3 where FSR 4 can trail FSR 3 in frame rates, with users also flagging issues such as ghosting on RDNA 2.
  • AMD has not announced broader official support beyond RDNA 4, and some coverage characterizes talk of future Redstone-based compatibility as speculative.