FSR
FidelityFX Super Resolution — AMD's upscaling technology, open-source and cross-vendor. FSR 4 brings machine-learning upscaling competitive with DLSS on supported hardware.
FSR is AMD's answer to DLSS. Unlike DLSS, it runs on any modern GPU — AMD, NVIDIA, and Intel — and is open source.
Version differences
- FSR 1/2 — spatial and temporal upscaling, lower quality than DLSS.
- FSR 3 — added frame generation, comparable to DLSS 3.
- FSR 4 — ML-based, RDNA 4 only, closed the visual quality gap with DLSS 3 in most titles.
When to enable
At 4K with any modern AMD card, FSR Quality is essentially free performance. At 1440p, the visual hit is small and the fps gain is meaningful. At 1080p, FSR Quality starts to show softness, especially on text and fine textures.
Cross-compatibility
FSR works on NVIDIA cards (older RTX, GTX) where DLSS doesn't. That's its biggest practical advantage for the ~40% of gamers still on pre-RTX cards.
How to use FSR in a real comparison
FidelityFX Super Resolution — AMD's upscaling technology, open-source and cross-vendor. FSR 4 brings machine-learning upscaling competitive with DLSS on supported hardware. In practice, this is most useful as one part of a decision rather than a standalone quality badge. Compare it alongside the workload, room, ecosystem, budget, and ownership constraints that apply to you; the strongest published figure is not automatically the best outcome for every buyer.
What to check next
On vsMars, read together so the value has product-specific context. It is especially relevant in .
Avoid the one-number trap
Manufacturers can describe the same capability under different conditions. Compare like-for-like variants, check the unit and test condition where available, and use a head-to-head page to see whether a measurable difference is material for your own use.
vsMars presents structured catalog values to make trade-offs legible. The linked product and spec pages are the right place to inspect the underlying values before buying.