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Minimax H3 Latent Upscaler suffers extreme slowdowns in StableDiffusion

By PulseAugur Editorial · [1 sources] ·

Users of the Minimax H3 Latent Upscaler, a tool for StableDiffusion, are reporting significant performance degradation when queuing multiple generations. The initial generation runs at normal speeds, but subsequent generations experience extreme slowdowns, with the upscaler taking over 1000 seconds per step. The issue appears to affect the initialization and execution of the upscaler's three steps after the first generation is completed. AI

IMPACT Potential usability issues for StableDiffusion users employing the Minimax H3 Latent Upscaler for multi-generation tasks.

RANK_REASON User-reported performance issue with a specific tool within the StableDiffusion ecosystem.

Read on r/StableDiffusion →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Minimax H3 Latent Upscaler suffers extreme slowdowns in StableDiffusion

How we ranked this

Signal score
7 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
User-reported performance issue with a specific tool within the StableDiffusion ecosystem.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, infra
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. r/StableDiffusion TIER_2 English(EN) · /u/WhiteKnight225 ·

    Minimax H3 Latent Upscaler becomes extremely slow when queueing multiple generations — anyone else?

    <!-- SC_OFF --><div class="md"><p>Hi guys,</p> <p>I've been testing the Minimax H3 latent upscaler for the past few days, and I'm running into a strange issue when I queue multiple generations.</p> <p>The first generation runs smoothly: the model loads, the steps complete, and th…

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