Thu Sep 18 11:20:00 UTC 2025: Here’s a summary and a news article rewrite of the provided text:

**Summary:**

A leaked version of AMD’s FidelityFX Super Resolution 4 (FSR 4), designed for next-gen GPUs, can be unofficially enabled on older graphics cards, including those from AMD and Intel. This is thanks to the accidental release of the full FSR 4 source code. By swapping some files and using a mod called OptiScaler, gamers can replace FSR 3 with FSR 4 in supported games. While not as good as DLSS, FSR 4 offers improved image quality compared to FSR 3 and Intel’s XeSS on older hardware, making it a potentially worthwhile upgrade for users with decent framerates to spare. Performance is “rough” but playable, and the visual quality is a noticeable improvement.

**News Article:**

**Hacky Workaround Brings AMD’s FSR 4 Upscaling to Older GPUs**

Gamers rejoice! Even if you’re not rocking the latest AMD Radeon RX 9000 series, you might still be able to experience the enhanced image quality of FSR 4, thanks to a bit of ingenuity and a fortunate mishap by AMD.

AMD’s FidelityFX Super Resolution 4 (FSR 4), designed for their upcoming RDNA 4 architecture, has been unofficially ported to a wide range of older GPUs. This unexpected development stems from AMD accidentally releasing the full source code of FSR 4, including a version compatible with the INT8 datatype, supported by most modern GPUs.

A resourceful Reddit user, /u/AthleteDependent926, has compiled the source code into a usable DLL file. This allows gamers to replace FSR 3 files in supported games with the FSR 4 version, enabling the upscaling tech on older hardware.

While the process isn’t a simple drop-in replacement, it’s made easier with the OptiScaler mod. By installing OptiScaler and swapping the appropriate DLL file, users can select FSR 4 within the mod’s interface.

“It’s a little unintuitive, but it absolutely works,” reports Tom’s Hardware. Their testing showed that while performance wasn’t flawless, FSR 4 offered a noticeable improvement in image quality compared to FSR 3 and Intel’s XeSS on both a Radeon RX 7800 XT and an integrated Radeon 8060S. “FSR 4 clearly has fewer artifacts and less aliasing,” they noted.

Keep in mind that this is a “hacky” solution and not officially supported by AMD. However, for gamers looking to squeeze extra visual fidelity out of their existing hardware, this could be a valuable, and free, upgrade. Enthusiasts and modders are being lauded for making this possibility a reality. Gamers should exercise caution when downloading files from unofficial sources.

Read More