MOSS-Image character LoRA trained on RX 7900 XT 20GB in 3.5 hours on native Windows
iBorgSimmer · reddit · 2026-10-28
A detailed AMD/Windows success report: a Redditor trained a MOSS-Image character LoRA in Fizgig (ROCm build) on a Radeon RX 7900 XT 20GB, then validated it in ComfyUI. Using 18 curated images, rank/alpha 32/32, AdamW at 1e-4, and 70 epochs (1,260 steps), the run took 3h35m with peak GPU memory of 17.5 GiB, yielding a 149MB safetensors file. The character's face holds across portrait, full-body and varied-outfit scenes, with ChatGPT/Codex assisting throughout the workflow.
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