MiniMax H3 Local Tests: Performance and Optimization Across GPUs

After MiniMax H3's open-source release, Reddit saw a wave of local test posts covering GPUs from RTX 3080 to RTX PRO 6000, sharing ComfyUI optimizations. Overall, the model runs on consumer cards but with huge speed differences; quantization and acceleration nodes can significantly boost efficiency.

Confirmed

• Performance data: RTX 5080 generates 15s video in 11 min (0.4MP, 10 steps); RTX 4060Ti generates 5s 1080p in 40 min; RTX 4070 Ti SUPER generates 5s in 5 min; RTX 4090 generates 10s in 10 min; RTX PRO 6000 generates 5s 864×480 in 50s, VRAM usage 40GB.
• Optimization effects: Enabling CUDA 13 and INT8 in ComfyUI speeds up over 3x; Spectrum node on RTX 3080 significantly improves speed; INT8 quantization and NVFP4 text encoder on RTX 4090 optimize generation.
• Hardware compatibility: RTX 4070 runs locally with impressive results; RTX 5060Ti can run reference-to-video (R2V).

Unconfirmed

• Workflow details (e.g., steps, resolution) vary across tests, so direct comparisons need caution.
• RTX 5060Ti is an unreleased GPU; its performance data is for reference only.

Why it matters

As an open-source video generation model, MiniMax H3's local feasibility and optimization methods are practically valuable for creators and developers. Community tests provide performance references across hardware, helping users choose suitable configurations.

2026-08-04 ~ 2026-08-05 · 13 related posts

Full story(20 episodes)→

• Episode 1: MiniMax H3 Video Model Tests Impress with Native 2K and Commercial Quality(2026-07-30, 59 posts)
• Episode 2: MiniMax Releases Multimodal Model H3 with 2K Native Stereo Video(2026-07-30, 18 posts)
• Episode 3: MiniMax H3 Model Coming Soon with Open Weights, Video and Multimodal Capabilities Spark Buzz(2026-07-30, 7 posts)
• Episode 4: MiniMax H3 Tops Video Editing Chart, Announces Open Weights(2026-07-31, 7 posts)
• Episode 5: Topview Launches MiniMax H3 at 30% of Seedance Price(2026-07-31, 9 posts)
• Episode 6: MiniMax H3 Video Model Nears Release with ComfyUI Support(2026-08-01, 2 posts)
• Episode 7: MiniMax H3 Video Model Hands-on: 2K Quality and Impressive Multi-shot Consistency(2026-08-01, 12 posts)
• Episode 8: MiniMax Video Model Goes Viral with Stunning User Tests(2026-08-01, 61 posts)
• Episode 9: MiniMax open-sources 33B multimodal video model H3(2026-08-02, 35 posts)
• Episode 10: MiniMax H3 and FLUX3 Overcome Audio Hallucination(2026-08-02, 2 posts)
• Episode 11: MiniMax H3 Local Tests: Benchmark Results and Comparisons Across GPUs(2026-08-03, 88 posts)
• Episode 12: MiniMax H3 Video Generation Model Tests Impress Users(2026-08-03, 15 posts)
• Episode 13: MiniMax H3 Runpod Template Adds Three Video Workflows(2026-08-03, 2 posts)
• Episode 14: MiniMax Video Model Generates Educational Animations(2026-08-03, 3 posts)
• Episode 15: MiniMax Releases Prompting Guide for H3 Video Model(2026-08-03, 4 posts)
• Episode 16: MiniMax H3 Local Tests: Performance and Optimization Across GPUs(2026-08-04, 13 posts)
• Episode 17: Ostris AI Toolkit Adds MiniMax H3 LoRA Training with Contrastive Guidance Loss(2026-08-04, 7 posts)
• Episode 18: MiniMax Releases 33B Open-Weight Multimodal Model H3 with Local Deployment(2026-08-04, 10 posts)
• Episode 19: NVIDIA Sol Engine Boosts MiniMax H3 Inference Speed by 3.95x(2026-08-04, 2 posts)
• Episode 20: Same-Prompt Test: Hailuo H3 Beats Seedance 2.0 in Visual Quality(2026-08-04, 6 posts)

• Testing MiniMax H3: Running Reference-to-Video on RTX 5060Ti — whakahere · 2026-08-04
• [source] Triple MiniMax H3 Speed in ComfyUI with CUDA 13 and INT8 — AI-imagine · 2026-08-04
• RTX 3080 Benchmark: Spectrum Nodes Significantly Accelerate MiniMax H3 Video Generation — Valuable_Issue_ · 2026-08-04
• [source] Testing MiniMax H3 on RTX 5080: 15-Second Video in 11 Minutes — FreeTheClanks · 2026-08-05
• 4090 Tested: Ultimate ComfyUI Setup for High-Speed Minimax H3 Video Generation — BigWideBaker · 2026-08-05
• MiniMax H3 on RTX 4070 Ti SUPER: Generates 5-Second Video Clips in ~5 Minutes — EdenAlon · 2026-08-05
• MiniMax H3 Local Test: RTX PRO 6000 Outperforms B300 by Almost Half in Inference Time — Resident_Sympathy_60 · 2026-08-05
• [source] MiniMax H3 Local Test: 5-Second Video in 50s on 96GB RTX PRO 6000 — Practical_Low29 · 2026-08-05
• Running MiniMax H3 Locally on RTX 4070 with SageAttention Acceleration — scooglecops · 2026-08-05
• Running Minimax H3 Video Generation Locally on RTX 4070: Stunning Results — Athem · 2026-08-05
• MiniMax H3 in ComfyUI: Generates 10s Video in 10 Mins on a 4090 — wjc_5 · 2026-08-05
• Benchmarking MiniMax H3 on RTX 5090: Efficiency vs. Pixel Workload — Forward-Parsley-148 · 2026-08-05

1 near-duplicate retellings: nortonanand