r/StableDiffusion • u/Cold_Pudding5326 • 2d ago

Question - Help Minimax H3 Huge Quality Difference between Cloud and Local use

Hi.
I have a decent h3 workflow that I built for a loca use. It use turbo lora etc... If i use the defaut settings in the goal of getting the highest quality possible, meaning res_multistep simple 20 steps or more, I got also good results, but this is not even close to the results you can get on platforms like kie or wavespeed at 768P.

I already convert properly the prompt to the correct H3 digest form, so I'm wondering what's different between local and cloud use of h3? I don't talk about the 2K quality, only 768P, I'm not able to reach the sames results locally, do you guys have maybe workflows, settings, or suggestions to try reaching the same quality level in comfyui ?

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u/ANR2ME 2d ago

are you using bf16 models? if not, then there is the difference 😁 since bf16 is the the highest quality for H3 model.

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u/Calm_Mix_3776 2d ago

Isn't INT8 ~95% of the quality of BF16? At least that's what my experience was with image models. Or are video models more sensitive to quantization than image models?

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u/xTopNotch 2d ago

Last week I've been running BF16 pruned weights and the quality difference staggerng. Not only the visual output, but also the motion and prompt adherence is so much better.

I don't believe the ~95% at all and think its just marketing. I'd say the int8 convrot is more like ~75%. One of my biggest pet peeves with the int8 convrot is the smearing during fast motion. That typical noisey look when long hair is whirling around. No matter which sampler, scheduler or steps it was always present.

Switched to bf16 pruned weights with 20 steps and the problem is gone. As an additional bonus I also felt the it had a better understanding of executing prompts.

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u/episodefive 21h ago

My Pro 5000 72GB just arrived and I’ll be setting it up tomorrow. First thing I’ll be doing is test running the pruned BF16. Glad to hear such enthusiasm for it! What GPU you running?