Stable Diffusion 3.5 Large on NVIDIA GeForce RTX 4090
NVIDIA GeForce RTX 4090 runs Stable Diffusion 3.5 Large excellently at FP16. This is a strong pairing.
Model Size
8.1B
Device VRAM
24 GB
Bandwidth
1008 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 4090.
| Quantization | Speed | TTFT | Fits in VRAM | Rating | Confidence |
|---|---|---|---|---|---|
| FP16 | — | 3500ms | ✓ Yes | Excellent | estimated |
Notes
FP16
1008 GB/s. ~3.5s per image. Best consumer GPU for SD 3.5 Large.
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 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: Performance estimates based on model size and device bandwidth (2026-03-15)
Data last updated: 2026-03-15