Stable Diffusion XL 1.0 on NVIDIA GeForce RTX 4090
Yes — RTX 4090 runs Stable Diffusion XL 1.0 excellently at FP16. 24 GB VRAM with plenty of headroom.
Model Size
6.6B
Device VRAM
24 GB
Bandwidth
1008 GB/s
Quantization
FP16
Performance by Quantization
OwnRig currently has one published compatibility entry for Stable Diffusion XL 1.0 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 | benchmarked |
Notes
FP16
~3-5 seconds per 1024x1024 image at 30 steps. Massive headroom for LoRA stacking and higher resolutions.
About Stable Diffusion XL 1.0
Stable Diffusion XL 1.0 (6.6B) is a image gen model. The standard for local image generation. 1024x1024 base resolution. Massive LoRA/checkpoint ecosystem. Runs well on 8GB+ VRAM. VRAM usage varies by resolution and batch size; 6.5GB is for single 1024x1024 generation.
View all Stable Diffusion XL 1.0 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: SD WebUI benchmarks (2026-01-15)
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.