Uploaded August 2026 | Updated September 2026, 43 minutes ago

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Steps to install FSR 4 using Optiscaler:

1. download the latest optiscaler build from the GitHub
2. extract the contents of that to the folder with the .exe of your game
3. run setup.bat included with optiscaler
4. open optiscaler.ini
5. find "Fsr4ForceEnableInt8" and change it from "auto" to "true"
6. save the file
7. open your game, select DLSS in the options
8. load into the game so that "DLSS" is actively running
9. open the optiscaler menu by pressing "insert" on your keyboard, and select "FSR 3.x/4" in the "upscaler" drop down menu. click "change upscaler".
10. give it about 20-40 seconds to finish applying, and then it should be working after that!
10.1. verify it's working by enabling the watermark:
"Either enable the Watermark under the Upscaler selection or by setting Fsr4EnableWatermark=true in OptiScaler.ini"



github.com/optiscaler/OptiScaler/releases/tag/v0.9.4




0:00 - 9:04 Installing FSR 4.1
9:04 - 26:43 Comparing DLSS CNN vs FSR 4 vs XeSS