FSR 4 modded to run on RDNA 2 GPUs improves image quality by “leaps and bounds,” but carries 10% performance penalty — AMD’s leaked source code turns into modding frenzy

Last month, AMD accidentally made FSR 4 open-source by publishing the entire source code on GitHub, as part of its FidelitySDK. That pushed modders to quickly reverse-engineer how to run FSR 4 on previously incompatible hardware, but the hacks were limited to Linux. That changed just last week when u/AthleteDependent926 on Reddit figured out how to make it work on Windows — we saw a 12-20% decrease in potential performance with it, and today new findings on older RDNA GPUs corroborate our…