---
title: "FSR4 | OptiScaler glossary"
description: "AMD's newer ML upscaling generation, reachable in OptiScaler only on supported output/GPU/driver/game combinations."
canonical: https://optiscaler.ink/glossary/fsr4
updated: 2026-10-18
---

# FSR4

AMD's newer ML upscaling generation, reachable in OptiScaler only on supported output/GPU/driver/game combinations.

## Facts (2026-10-18)

- **Version:** OptiScaler 0.9.4 (reference build, July 2026)
- **APIs:** DirectX 11, DirectX 12, Vulkan
- **Upscalers:** DLSS, FSR and XeSS inputs/outputs where compatible
- **Frame generation:** Experimental OptiFG (DirectX 12)
- **Overlay:** Insert key
- **Install:** ZIP extracted next to the main game executable
- **Platform:** Windows; Linux via Proton/Wine varies
- **Site:** Independent guide — not the official project site

## Definition: FSR4

AMD's newer ML upscaling generation, reachable in OptiScaler only on supported output/GPU/driver/game combinations.

Unsupported combinations fall back to another path, so verify the active mode instead of trusting the menu selection.

## Where it matters

Start in the [guides](https://optiscaler.ink/guides) for the workflow, or go straight to [Download](https://optiscaler.ink/download) and test one game at a time with a backup in place.

## FAQ

### What does FSR4 mean for OptiScaler?

AMD's newer ML upscaling generation, reachable in OptiScaler only on supported output/GPU/driver/game combinations. Unsupported combinations fall back to another path, so verify the active mode instead of trusting the menu selection.

## Related

- [OptiScaler terms: OptiFG, proxy DLL, input and output](https://optiscaler.ink/glossary)
- [OptiScaler guides: install, FSR4, Linux, performance and safety](https://optiscaler.ink/guides)
- [Input upscaler](https://optiscaler.ink/glossary/input-upscaler)
- [Output upscaler](https://optiscaler.ink/glossary/output-upscaler)
- [OptiFG](https://optiscaler.ink/glossary/optifg)

## Download

ZIP next to the game executable: [Download OptiScaler](https://optiscaler.ink/download)

Markdown mirror: https://optiscaler.ink/glossary/fsr4.md