Stable Diffusion 3 Medium on NVIDIA GeForce RTX 4090
Yes — RTX 4090 runs Stable Diffusion 3 Medium excellently at FP16. 24 GB VRAM with plenty of headroom.
Model Size
2B
Device VRAM
24 GB
Bandwidth
1008 GB/s
Quantization
FP16
Performance by Quantization
OwnRig currently has one published compatibility entry for Stable Diffusion 3 Medium on NVIDIA GeForce RTX 4090 at FP16. This is the best supported pairing we can stand behind today.
| 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
Estimate method: SD3 performance reports. Reference hardware source: github.com (2026-03-01)
Performance varies by driver version, inference engine, quantization method, context length, and system configuration. Figures shown are estimates based on community benchmarks and may not reflect your exact setup. Product names are trademarks of their respective owners. OwnRig is independent and not affiliated with any hardware or AI model provider.