Best GPU for Stable Diffusion in 2026
For local image generation, VRAM matters more than raw speed. 8GB runs SD 1.5 fine; 12GB unlocks SDXL comfortably; 16GB+ makes big batches and video models painless. Here's the value pick at every budget.
How much VRAM Stable Diffusion needs
VRAM BY WORKLOAD
The value picks
Budget: RTX 3060 12GB — the community darling. 12GB for cheap means SDXL runs without fuss.
Sweet spot: RTX 4070 Super — much faster generations, still 12GB, great daily driver.
High-end: RTX 4090 24GB — fastest consumer option, headroom for video and huge batches.
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NVIDIA vs AMD for image gen
Honestly: NVIDIA is still the smoother path for Stable Diffusion — most tools assume CUDA. AMD works but expect more setup. If image generation is your main goal, an NVIDIA card saves headaches.
Also see: Best Budget GPUs for Local AI and What Can a 12GB GPU Run?