Stable Diffusion 3.5 Large on NVIDIA GeForce RTX 4070 Super
NVIDIA GeForce RTX 4070 Super handles Stable Diffusion 3.5 Large well at Q8_0. A solid choice for this model.
Model Size
8.1B
Device VRAM
12 GB
Bandwidth
504 GB/s
Quantizations Tested
1
Performance by Quantization
Each row shows Stable Diffusion 3.5 Large performance at a different quality level on NVIDIA GeForce RTX 4070 Super.
| 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
Source: Performance estimates based on model size and device bandwidth (2026-03-15)
Data last updated: 2026-03-15