If you can’t wait for AMD or game developers to bring the latest FSR 4 to your favourite games, there may be a work around. Modders have built a solution to swap any of the Nvidia and Intel upscalers for AMD’s and vice versa. You simply select the upscaler your GPU handles the best, and voila, you have the latest features.
OptiScaler is a tool that lets you replace upscalers in games that already support Nvidia’s DLSS 2, AMD’s FSR 2, and Intel’s XeSS. But unlike other modding tools which simply swap the games DLL files, OptiScaler takes game and API inputs before translating them into the desired upscaler type/version. This allows it to also inject frame generation and latency reducing technologies. In other words, you could bring FSR 4 to games that support DLSS or XeSS.
That said, you will unfortunately still need an RDNA 4 GPU for FSR 4 due to its AI acceleration requirements – tough luck for me, I guess. Also, due to how FSR 2 and FSR 3 support custom interfaces, game support will depend on developer implementation. Currently OptiScaler can be used with DirectX 11, DirectX 12, and Vulkan APIs, each offering different sets of upscaler options. You can find more details on OptiScaler’s GitHub page.
OptiScaler basically solves one of FSR 4 limitations, i.e. the requirement for FSR 3.1 game compatibility. This brings the Radeon 9000 GPUs closer to their RTX 50 Series counterparts in terms of upscaling features, though game stability may vary due to its unofficial nature. Overall, it’s worth a shot for those extra frames, although I’d avoid swapping upscalers in online games just in case the file modification kicks up a fuss with anti-cheat measures.
Like other upscaler swappers, the in-game settings will continue reporting the original version of FSR, DLSS, and XeSS even after upgrading it to FSR 4, DLSS 4, etc. Yes, OptiScaler also works the other way around allowing you to swap FSR for DLSS or DLSS for XeSS. But your mileage may vary depending on how each game is built. You can even inject FSR frame generation on titles that have DLSS frame generation.
BNCH bench on YouTube has shared a short video showcasing the visual differences obtained after swapping to FSR 4. We can clearly see how the grass in particular is more stable with no shimmering. Same on places where light interacts with aliased fences: FSR 4 is clearly superior. Lastly, hair looks much better with minimal aliasing during movement.
The YouTuber noticed between 4.5% and 7.5% performance hit by moving to FSR 4 on a Radeon RX 9070 XT, which is perfectly fine given the visual improvements. Note, however, that all tested scenes were stationary without any explosions or other intense/demanding effects. If you fancy giving it a try, High Yield on X has a step-by-step guide on how to do so.
Here is the list of games known to work with Optiscaler:
- Amid Evil
- Atomic Heart (tested on DLSS Input)
- Avowed (tested on DLSS input)
- Baldur’s Gate 3 (tested on DLSS input, need to use DX11 .exe.)
- Black Myth: Wukong
- Cyberpunk 2077 (Need to use FSR or XeSS inputs, Crashes on Windows 10)
- Deep Rock Galactic (tested on DLSS Input)
- Dragon’s Dogma II (set FGType=nofg)
- Final Fantasy VII Rebirth (tested on DLSS Input)
- Ghost of Tsushima (tested on FSR3 input)
- Hitman: World of Assassination (Use DLSS or XeSS)
- Horizon Zero Dawn Remastered
- Jusant (DLSS inputs)
- Kingdom Come: Deliverance II
- Lies of P (tested on DLSS input)
- Like A Dragon: Infinite Wealth (Use DLSS)
- Postal 4
- Red Dead Redemption 2 (use DX12)
- Senua’s Saga: Hellblade 2 (tested on DLSS input)
- Silent Hill 2 Remake (tested on DLSS inputs)
- Shadow of the Tomb Raider (tested on DLSS inputs)
- The Outer Worlds Spacer Choice Edition
- Tiny Tina’s Wonderlands
- Tokyo Xtreme Racer (tested on DLSS inputs)
- Uncharted: Legacy of Thieves Collection (tested on DLSS inputs)
- The Witcher 3 Next Gen (tested on XeSS inputs)
FSR 4 news doesn’t stop here. The improvement brought by FSR 4’s AI capabilities has tempted even Sony. Apparently, upcoming PlayStation 5 Pro games will switch from the brand’s PSSR (PlayStation Spectral Super Resolution) to AMD’s FSR 4 in 2026, which should further improve the console’s upscaling quality.
This has at least two implications. First, since PS5 Pro doesn’t house an RDNA 4 GPU, it means that FSR 4 can be brought down to older Radeon GPUs on PC. Secondly, having console support could help developer adoption, which would end up on the PC version of these games, and possibly other games developed by the same teams. Great times ahead for AMD users.
