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According to a report from HardwareLuxx, AMD has not yet decided on whether its excellent FSR 4.1 upscaler will be available on the RDNA 3.5 architecture. A release for the preceding RDNA 3 is confirmed for July, with RDNA 2 support to follow early next year. At Computex, HardwareLuxx spoke to AMD's David McAfee, Corporate VP and General Manager of the Client Channel Business, reported as saying that the firm is still weighing the pros and cons of implementing it. Based on this conversation, HardwareLuxx suggests that the decision is "leaning towards no".
While overall support still needs to improve, FSR 4 and the upgraded FSR 4.1 has been a massively important step forward for AMD, delivering the kind of quality Nvidia owners have enjoyed for some time. And it's equally fair to say that Sony's offshoot work - the upgraded version of PSSR - has been equally transformative for PlayStation 5 Pro's fortunes. Currently only available for RDNA 4-based GPUs, FSR 4 uses FP8 machine learning instructions, unsupported on preceding architectures.
PS5 Pro doesn't support FP8 either, but the INT8 version of the super resolution technology proves that the same level of quality is possible, so we're really looking forward to seeing how the RDNA 3 version of FSR 4.1 will present when it arrives next month. The challenge here is that RDNA 3 cards have less ML horsepower to work with: our guess is that the delay between the upscaler's launch on RDNA 4 and older cards may come down to the need for optimisation work.
I am curious as to why RDNA 3.5 may not receive support, particularly when the powerful Strix Halo processor uses that architecture and would benefit immensely from its implementation in gaming applications. For the laptop and handheld APUs that also use RDNA 3.5, support should be an option - but the technology is challenging and the actual performance scaling benefits may be blunted, something we saw in our testing of the leaked FSR 4 INT8 DLL last year.
That "unofficial" version of FSR 4 has been integrated into Optiscaler, allowing it to work on pretty much any handheld and while the performance cost is onerous, some still choose to use it based on its level of quality. I can imagine that the people behind Optiscaler would love to integrate the new version into the code - so maybe some level of unofficial support will happen.
We'll be looking at FSR 4 on RDNA 3 as soon as we can - and as the semi-custom AMD GPU within Steam Machine is based on RDNA 3, we hope to look at the tech running on the Valve machine too.