If you’re an owner of a Radeon RX 9000 Series GPU, you may have noticed a new driver update for your graphics card on AMD’s Adrenalin app. That’s because the company has released FSR Redstone, a suite of AI upscaling technologies that complement the existing FSR 4 tech. And like FSR 4, it only supports RDNA 4 cards.
FSR is AMD’s answer to the video game upscaling race, competing directly with Nvidia’s DLSS and Intel’s XeSS. First announced at Computex 2025, FSR Redstone doesn’t necessarily replace FSR 4 (we’ll get to that in a bit), but it does expand its feature set with three new technologies centred around machine learning:
- FSR Radiance Caching: A system that, in real time, learns how light is transmitted in a scene and predicts how it will travel;
- FSR Ray Regeneration: A denoiser that fixes a current problem with ray tracing – a high amount of noise on surfaces with ray traced lighting – by analysing low-sample frames and cleaning them in real time; and
- FSR Frame Generation (ML): This is pitched as an upgrade to Frame-Gen technologies present on existing FSR standards, utilising a neural network that takes two consecutive frames and generates intermediate frames between them to compensate for motion-related effects like ghosting.
Alongside these three new features is FSR Upscaling (ML), which is what FSR 4 has been re-branded to following Redstone’s launch.
AMD is touting some pretty ambitious performance gains with FSR Redstone. This includes a quadruple the frames in games like Call of Duty: Black Ops 7 and Cyberpunk 2077, and three times as much in F1 25, when you’re playing on a Radeon RX 9070 XT.
Purported performance gains from FSR Redstone. Take note, though, games tested utilised only FSR Frame Generation (and Ray Regeneration for Black Ops 7).





