Skip to main content PC Gamer THE GLOBAL AUTHORITY ON PC GAMES Search PC Gamer View Profile Movies & TV Gaming Industry PC Gaming Show Newsletter Signup Community Guidelines Affiliate Links Meet the team About PC Gamer PC Gamer Magazine Subscription Why subscribe? Subscribe to the world's #1 PC gaming mag Try a single issue or save on a subscription Issues delivered straight to your door or device From£35.99Subscribe now Gamescom 2025 Essential Hardware Battlefield 6 PC Gamer quizzes! Recommended reading Graphics Cards AMD's tiny FSR 3 update aims to improve upscaling quality but also lays the foundation for adding Redstone AI tech to games Graphics Cards OptiScaler has been updated to theoretically support AMD's FSR 4 in all games with upscaling that don't use Vulkan or anti-cheat—which is nice, but why the heck doesn't AMD do this? Graphics Cards AMD offers an update on Project Amethyst, a Sony collaboration that's already 'delivered smarter, more efficient solutions like Super Resolution in FSR 4' Graphics Cards The latest version of Intel's XeSS 2 now lets other GPUs run its AI-based frame generation system, throwing RTX 30-series owners a Team Blue-shaped bone Graphics Cards It's only taken six months but at long last, AMD's Adrenaline driver has FSR 4 support for Cyberpunk 2077 Graphics Cards 'MSI Afterburner is a bit PowerColor Afterburner now' as the dev had to buy another manufacturer's GPU to build support for AMD's RDNA 4 graphics cards into the next beta Graphics Cards One lucky Redditor has managed to snag themselves a mythical AMD Radeon GeForce RTX RX 9070 XT. Yes, you read that right Graphics Cards AMD accidentally released the source code for FSR 4 before swapping back to the normal SDK, and a glimpse at the libraries suggests it might support older graphics cards in the near future Andy Edser 21 August 2025 Butterfingers, perhaps? When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. (Image credit: AMD Gaming) Look, we've all made mistakes. One New Year's Eve, I accidentally drunk-texted a relative instead of an ex, and let me tell you, I'm still living that one down. AMD doesn't appear to be immune to the odd 'whoopsie daisy' either, as it appears it's accidentally released the source code for FSR 4 on GitHub before switching it to the regular SDK, and it's made for some interesting reading. Videocardz managed to grab a screenshot of some of the file directories, which appears to show libraries for INT8 shaders, suggesting that it was originally designed for (or perhaps, will be supported in future by) older graphics cards. It's difficult to know for sure, but what we do know is that releasing the code was a mistake, as AMD has since replaced it with the normal SDK release. Keen-eyed redditors also noticed the error, delving through the codebase and finding clauses for swapping to INT8 shaders instead of using the FP8 versions supported by the new AI accelerators found on RX 9000-series RDNA 4 cards. Related Articles AMD's tiny FSR 3 update aims to improve upscaling quality but also lays the foundation for adding Redstone AI tech to games OptiScaler has been updated to theoretically support AMD's FSR 4 in all games with upscaling that don't use Vulkan or anti-cheat—which is nice, but why the heck doesn't AMD do this? AMD offers an update on Project Amethyst, a Sony collaboration that's already 'delivered smarter, more efficient solutions like Super Resolution in FSR 4' FSR 4 is the first machine learning-based version of AMD's upscaling tech, replacing the compute-based versions of old, and thereby requires dedicated hardware in the new cards in order to deliver better image quality, less ghosting, and improved temporal stability over previous iterations. That being said, it's possible that AMD has been busy behind the scenes optimising a version for older GPUs, which would be good news for those of you running something like the still-performant RX 7800 XT. Or, it could simply be the case that FSR 4 was at some point being tested on older hardware, before the addition of updated AI-crunching additions to the new cards made it something of a moot point. Regardless, I doubt AMD is happy about the mix-up, as either way it's a peek behind the curtain at features that once were, or a glimpse into the future at support that might be. (Image credit: AMD) The eventual AMD FidelityFX SDK 2.0.0 we've ended up with, though, has a list of fixes for updated effects over previous versions, and of course, FSR 4 itself, now at version 4.0.2. We're still awaiting the release of the biggest update since FSR 4's announcement, codenamed Redstone. It's said to add Neural Radiance Caching to enhance the prediction of indirect lighting, along with machine learning-enhanced ray regeneration, and a whole new model for its frame generation tech, which will hopefully bring it closer in parity to Nvidia's Frame Generation tech in image quality. The biggest gaming news, reviews and hardware deals Keep up to date with the most important stories and the best deals, as picked by the PC Gamer team. Contact me with news and offers from other Future brandsReceive email from us on behalf of our trusted partners or sponsorsBy submitting your information you agree to the Terms & Conditions and Privacy Policy and are aged 16 or over. And who knows, perhaps there'll be a big announcement about expanding GPU support, too? It's not something I was expecting before this recent leak, but now I'd say it was more likely than ever, at the very least. And let's collectively pour one out for whoever accidentally committed the source code. That's a bad Wednesday afternoon, I reckon. Best graphics card 2025All our current recommendations 👉Check out our full guide👈 1. Best overall: AMD Radeon RX 9070 2. Best value: AMD Radeon RX 9060 XT 16 GB 3. Best budget: Intel Arc B570 4. Best mid-range: Nvidia GeForce RTX 5070 Ti 5. Best high-end: Nvidia GeForce RTX 5090 Hardware Writer Andy built his first gaming PC at the tender age of 12, when IDE cables were a thing and high resolution wasn't—and he hasn't stopped since. Now working as a hardware writer for PC Gamer, Andy's been jumping around the world attending product launches and trade shows, all the while reviewing every bit of PC hardware he can get his hands on. You name it, if it's interesting hardware he'll write words about it, with opinions and everything. You must confirm your public display name before commenting Please logout and then login again, you will then be prompted to enter your display name. AMD's tiny FSR 3 update aims to improve upscaling quality but also lays the foundation for adding Redstone AI tech to games OptiScaler has been updated to theoretically support AMD's FSR 4 in all games with upscaling that don't use Vulkan or anti-cheat—which is nice, but why the heck doesn't AMD do this? AMD offers an update on Project Amethyst, a Sony collaboration that's already 'delivered smarter, more efficient solutions like Super Resolution in FSR 4' The latest version of Intel's XeSS 2 now lets other GPUs run its AI-based frame generation system, throwing RTX 30-series owners a Team Blue-shaped bone It's only taken six months but at long last, AMD's Adrenaline driver has FSR 4 support for Cyberpunk 2077 'MSI Afterburner is a bit PowerColor Afterburner now' as the dev had to buy another manufacturer's GPU to build support for AMD's RDNA 4 graphics cards into the next beta Latest in Graphics Cards Call that ideal GPU physique? Nah, the 800 W 30th anniversary Asus ROG Matrix RTX 5090 is ideal GPU physique Can't afford the $7,000 gold-plated Asus RTX 5090? How about the downright reasonable $2,589 RTX 5080 Core version? Nvidia DLSS Override is getting a global toggle, allowing you to easily force Multi Frame Gen and transformer upscaling across all regular FG and DLSS games Nvidia announces the 'biggest launch in GeForce Now RTX history': RTX 5080 performance, local-style installs, better game streaming quality, and more Valve says Steam's performance monitor should now report GPU utilisation more accurately than Task Manager in the latest beta, and as a nerd, this pleases me in ways I can't describe Nvidia's RTX Hair feature looks set to give the cast of Indiana Jones and the Great Circle some fabulously luscious locks Latest in News 18 protesters arrested: Microsoft claims 'vandalism and property damage,' protesters claim 'genocide powered by Microsoft technology' The ROG Xbox Ally borrows a heck of a lot from the Steam Deck, proving that the old gated console concept is a thing of the past 'This is the Ally 2, 100%': Asus says the ROG Xbox Ally is a bona fide successor to the first two handhelds, but the originals will still get new Xbox features The roguelike Prince of Persia platformer is now out of early access and feature complete, though it may get more content if it 'gets popular' Goodbye Jason Voorhees, hello Michael Myers: Friday the 13th developer and publisher return with a new multiplayer survival horror game based on Halloween Randy Pitchford says Borderlands 4 is worth $200, but he wishes 'they'd give it away' HARDWARE BUYING GUIDES LATEST GAME REVIEWS Best PCIe 5.0 SSD for gaming in 2025: the only Gen 5 drives I will allow in my PC Best graphics cards in 2025: I've tested pretty much every AMD and Nvidia GPU of the past 20 years and these are today's top cards Best gaming laptop in 2025: I've put the best of this new generation head-to-head and we have a winner Best gaming chair in 2025: I've tested a ton of gaming chairs and these are the seats I'd suggest for any PC gamer Best Steam Deck accessories in Australia for 2025: Our favorite docks, powerbanks and gamepads MSI MPG CoreLiquid P13 360 review Asus ROG Falcata Alienware 18 Area-51 (2025) review LG Ultragear 45GX950A gaming monitor review Sword of the Sea review PC Gamer is part of Future plc, an international media group and leading digital publisher. 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