Stable Diffusion 3.5 Large on NVIDIA GeForce RTX 4070 Super
Yes — RTX 4070 Super handles Stable Diffusion 3.5 Large well at Q8_0 — ~8s first response. Solid daily-driver performance on 12 GB VRAM.
Model Size
8.1B
Device VRAM
12 GB
Bandwidth
504 GB/s
Quantization
Q8_0
Performance by Quantization
OwnRig currently has one published compatibility entry for Stable Diffusion 3.5 Large on NVIDIA GeForce RTX 4070 Super at Q8_0. This is the best supported pairing we can stand behind today.
| Quantization | Speed | TTFT | Fits in VRAM | Rating | Confidence |
|---|---|---|---|---|---|
| Q8_0 | – | 8000ms | ✓ Yes | Good | estimated |
Notes
Q8_0
FP16 at 12.5GB doesn't fit on 12GB. Q8_0 (9GB) fits. ~8s per image.
About Stable Diffusion 3.5 Large
Stable Diffusion 3.5 Large (8.1B) is a image gen model. Latest Stable Diffusion architecture with significantly improved prompt adherence, typography, and composition over SDXL. Higher VRAM requirement (12GB+ at FP16) but produces noticeably better images. The current standard for local image generation.
View all Stable Diffusion 3.5 Large hardware options →About NVIDIA GeForce RTX 4070 Super
NVIDIA GeForce RTX 4070 Super has 12 GB at 504 GB/s. Street price: $599.
See all models NVIDIA GeForce RTX 4070 Super can run →Builds with NVIDIA GeForce RTX 4070 Super
Estimate method: Performance estimates based on model size and device bandwidth. Reference hardware source: github.com (2026-03-15)
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.