Stable Diffusion 3 Medium on NVIDIA GeForce RTX 4090
NVIDIA GeForce RTX 4090 runs Stable Diffusion 3 Medium excellently at FP16. This is a strong pairing.
Model Size
2B
Device VRAM
24 GB
Bandwidth
1008 GB/s
Quantizations Tested
1
Performance by Quantization
Each row shows Stable Diffusion 3 Medium performance at a different quality level on NVIDIA GeForce RTX 4090.
| Quantization | Speed | TTFT | Fits in VRAM | Rating | Confidence |
|---|---|---|---|---|---|
| FP16 | — | — | ✓ Yes | Excellent | estimated |
Notes
FP16
Full FP16 SD3 Medium. ~8-12 seconds per image. Best quality local image gen.
About Stable Diffusion 3 Medium
Stable Diffusion 3 Medium (2B) is a image gen model. Stability AI's SD3 medium model for high-quality image generation.
View all Stable Diffusion 3 Medium hardware options →About NVIDIA GeForce RTX 4090
NVIDIA GeForce RTX 4090 has 24 GB at 1008 GB/s. Street price: $1,799.
See all models NVIDIA GeForce RTX 4090 can run →Builds with NVIDIA GeForce RTX 4090
Source: SD3 performance reports (2026-03-01)
Data last updated: 2026-03-15