Can't believe I can create 4k videos with a crap 12gb vram card in 20 mins
A Reddit user generated a 4K AI video using only 12GB VRAM and default ComfyUI settings in under 20 minutes.
A viral Reddit post has demonstrated a significant leap in accessibility for AI video generation. Using Kijai's 'Distilled fp8 input scaled v3' model within the popular ComfyUI interface, a user generated a 4K resolution video on a consumer graphics card with only 12GB of VRAM. The entire process, from a text prompt to final output, took approximately 20 minutes using entirely default ComfyUI settings and workflows. This represents a 'zero-shot' approach, meaning the video was created in a single attempt without iterative refinement, manual quality checks, or re-dos.
The technical workflow involved generating a source video at 1080p resolution before employing NVIDIA's RTX Super Resolution technology to upscale the final output to 4K. The post acknowledges minor artifacts—like strange-looking silverware and a candle—but emphasizes the raw speed and hardware efficiency. This breakthrough suggests that high-fidelity AI video generation, once the domain of researchers with massive compute budgets, is rapidly democratizing. Professionals and creators can now experiment with near-state-of-the-art video synthesis without investing in prohibitively expensive hardware setups, potentially accelerating content creation pipelines and prototyping.
- Kijai's Distilled fp8 v3 model generated a 4K video on a 12GB VRAM GPU in 20 minutes.
- Used a zero-shot approach in ComfyUI with default settings and no quality iterations.
- Upscaled from a 1080p source to 4K using NVIDIA RTX Super Resolution technology.
Why It Matters
Democratizes high-end AI video generation, making it viable for creators and professionals with consumer-grade hardware.