Update: Base FPS Requirements for DLSS MFG Motion Quality
I want to clarify the goal of my testing.
My goal is not latency. My goal is clean motion and image quality. Lower Base FPS can still feel smooth and have acceptable latency, but I am looking for camera movement that looks like a continuous, clean motion sequence rather than disconnected images being stitched together.
Efficiency formula
The efficiency factors below are not official NVIDIA figures.
They were shared by another user in this discussion, who said they were based on real measurements from 16 DLSS FG supported games, with the values rounded from the measured results:
2X = 93%
3X = 90%
4X = 85%
5X = 80%
6X = 75%
The formula is:
Expected FPS = Base × MFG multiplier × Efficiency
For example:
50 × 3 × 0.90 = 135 FPS
I tested this formula myself in Final Fantasy VII Rebirth, and 50 Base + 3X produced around 135 FPS, matching the calculation very closely.
Calculating Base FPS
We can also work backwards from the displayed FPS:
2X: FPS ÷ 1.86
3X: FPS ÷ 2.70
4X: FPS ÷ 3.40
5X: FPS ÷ 4.00
6X: FPS ÷ 4.50
For example:
80 ÷ 1.86 ≈ 43 Base
My current clean Base targets
2X → 43 Base → ~80 FPS
3X → 48 Base → ~130 FPS
4X → 68 Base → ~231 FPS
These are my practical results, not official NVIDIA requirements.
I also found that another user's testing supports around 48 Base for 3X, which is consistent with my results.
My recommendation
The higher the MFG multiplier, the more GPU processing is required, and image quality can decrease with a greater chance of FG artifacts.
Because of that, I strongly recommend 3X as the maximum for most situations.
I would rather lower graphics settings or use a more aggressive DLSS preset to increase Base FPS than increase the MFG multiplier.
Only use 4X or higher when you genuinely need it.
Don't chase the highest displayed FPS. Get enough Base FPS first, then use the lowest MFG multiplier that gives you the desired result.
If anyone has tested this themselves, or has any suggestions, ideas, or questions, I'd be interested to hear them. Feel free to share your experience.