Optiscaler delivers improved FSR 4 version for AMD RDNA 2 GPU users
The Optiscaler community has done what AMD couldn’t: bring FSR 4 to RDNA 2
The Optiscaler Community has come together to create an improved version of AMD’s leaked FSR 4 INT8 version. With this new version, FSR 4.0.2b, users of RDNA 2 graphics cards can now use AMD’s improved upscaler with significantly less ghosting. Furthermore, this version now works on AMD’s newest RDNA 2 GPU drivers.
Right now, AMD’s FSR 4 technology is exclusive to the company’s Radeon RDNA 4 graphics cards. These GPUs use hardware-accelerated FP8 math to perform their AI upscaling. This hardware acceleration is not available on older Radeon GPU architectures. That said, AMD’s leaked INT8 version of FSR 4 could work on older GPUs, with gamers successfully testing it on RDNA 3 and RDNA 2 GPUs. While these leaked upscaler versions aren’t as good as AMD’s RDNA 4/FP8 veriant, they deliver much higher levels of image quality than FSR 3.
Optiscaler is better at supporting older AMD hardware than AMD themselves…
With their new 4.0.2b version of FSR 4’s INT8 version, the Optiscaler community has given RDNA 2 GPU owners a welcome upgrade. When asked about FSR 4’s INT8 version, AMD’s official statement is that they have “no updates to share at this time.” That statement was from February 2026.
While Nvidia had delivered its newest DLSS 4.5 upscaler to all of its RTX series GPUs (which date back to 2018), AMD has refused to bring FSR 4 to anything predating its 2025 RDNA 4 graphics architecture. This has caused anger among longtime AMD fans, as users of AMD’s relatively recent RDNA 2 and RDNA 3 graphics architectures have been left behind.
(Source – Optiscaler Discord)
AMD, just do it already…
When the INT8 version of FSR 4 leaked, the cat was out of the bag. AMD has proved that FSR 4 support is possible for its RDNA 2 and RDNA 3 graphics cards. The only thing stopping official FSR 4 support is AMD, and their refusal to finalise their INT 8 version and release it.
Yes, the leaked INT8 version of FSR 4 is inferior to its RDNA 4/FP8 version. Regardless, it delivers much better results than FSR 2/3, which makes it a worthwhile upgrade. Optiscaler has even improved AMD’s INT8 version, highlighting that AMD could do the same.
At this point, it feels like AMD is unnecessarily burning away the goodwill that gamers have for the Radeon brand. AMD can fix this by bringing FSR 4 to RDNA 2/3 GPUs. It doesn’t need to be as good or performant as FSR 4 on RDNA 4 GPUs; it just needs to work. Nvidia’s older RTX GPUs run their newest DLSS models much slower than their newer GPUs, but that hasn’t stopped Nvidia from giving gamers the option to use it. AMD can do the same, and gamers would love them for it.
You can join the discussion on Optiscaler delivering an improved version of FSR 4 to AMD RDNA 2 GPU users on the OC3D Forums.
