AMD continues to avoid clear answers on why FSR 4 remains locked to RDNA 4 GPUs, even as users with RDNA 2 and RDNA 3 cards keep asking for support and testing unofficial workarounds that already prove it can run on older hardware.
The situation has dragged on for over a year since FSR 4 launched with Radeon RX 9000 series, and the lack of communication now raises more questions than the restriction itself.
Former FSR Head Responds Without Explaining
Colin Riley, who previously led FSR development, reacted when someone asked about this limitation.
He posted a meme saying he would be in “big trouble” if he spoke, which strongly suggests he knows the reason behind AMD’s decision but cannot share it publicly, and that alone adds weight to the idea that this is not a technical limitation.
AMD has never confirmed plans for an INT8 version of FSR 4 for RDNA 2 or RDNA 3, even though files and tests show compatibility exists, and this silence continues despite repeated questions from users.
Workarounds Show FSR 4 Already Works
Users have already found ways to run FSR 4 on RX 6000 and RX 7000 GPUs using third-party tools like Optiscaler, and the results show clear improvements over FSR 3.1 with sharper visuals, better clarity, and reduced ghosting.
In several cases, FSR 4 Balanced mode performs better than FSR 3.1 Quality mode, which highlights how much performance and image quality AMD leaves unused on older GPUs.
Reports also confirm that FSR 4.1 works on RDNA 3 with tweaks, delivering results similar to RDNA 4 cards, yet AMD still limits official support to newer hardware, leaving millions of users waiting without a clear explanation.
