MiniMax H3 video gen on 8GB RX 6600: 5s clip in 10 minutes with ComfyUI tweaks
posojekh · reddit · 2026-11-02
A Reddit user ran MiniMax H3 video generation on an RX 6600 with just 8GB of RAM via ComfyUI: default workflow with swapped models, a Taomate H3 3-step Turbo LoRA, ClipProj for the text encoder, and a tweaked launch script. A 5-second 512x768 video generated in about 10 minutes.
Setup: CachyOS, Ryzen 7500F, RX 6600, 8GB DDR5, Python 3.12 with ROCm 7.2 nightly torch. The author shared the workflow JSON, LoRA and ClipProj links, plus a startup script with key tricks: setting vm.overcommitmemory=1 so the kernel accepts the 21GB model mmap, ulimit -s unlimited, MIOpen FAST mode, and a systemd-run memory scope to keep systemd-oomd from killing the terminal — alongside ComfyUI flags like dynamic VRAM, fast-disk, and cache-none.
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