Workflow Goal:
Provide a clean reference implementation for MiniMax H3 based text-to-video generation.
This workflow focuses on simplicity, reproducibility, and education rather than including every available feature or optimizations. It reflects a tested baseline for producing high-quality videos from a prompt. Treat it as a starting point and adapt the prompt and LoRA stack for your preferred artistic direction.
IMPORTANT NOTE:
Validated using an NVIDIA RTX 2080 (8 GB VRAM) with 64 GB System RAM.
Low VRAM does not mean low hardware requirements.
MiniMax H3 Text-to-Video is computationally intensive. Even when GPU VRAM is managed efficiently, higher resolutions and longer videos can require substantial system RAM for memory paging and intermediate data.
## Model
- MiniMax H3 INT8 quantized diffusion model
https://civarchive.com/models/2830065/minimax-h3-int8int4-convrot
- Qwen3-VL 32B NF4/AWQ text encoder
- H3 Video VAE FP16
https://huggingface.co/Comfy-Org/MiniMax-H3/resolve/main/vae/minimax_h3_video_vae_fp16.safetensors
- H3 Audio VAE FP32
https://huggingface.co/Comfy-Org/MiniMax-H3/resolve/main/vae/minimax_h3_audio_vae_fp32.safetensors
- MiniMax H3 Turbo LoRA
https://civarchive.com/api/download/models/3206543?fileId=3088145
## Tested Configuration
- GPU: NVIDIA RTX 2080 8 GB
- System RAM: 64 GB
- Resolution: 768 × 512
- Duration: 5 seconds
- CFG: 1.0
- Sampler: res_multistep
- Scheduler: simple
## Steps
4 steps + Turbo LoRA
- Primary configuration.
- Good visual quality, motion, effects and audio.
- Very fast relative to the base model.
- Slight slow-motion feel may occur at the beginning of some clips.
## Optimization
- No hardware-specific attention optimizations used.
- No SageAttention.
- No other VRAM/speed optimization nodes or launch parameters required.
- Reference workflow intentionally uses the standard H3/ComfyUI execution path.
## Credits
- MiniMax H3: MiniMax
- H3 ComfyUI implementation / model work: Kijai
- Turbo LoRA: LightX2V
- INT8 quantization: see model source linked above
- Workflow reference: MiniMax H3 community/reference workflow