Running MiniMax H3 Locally on RTX 3080 Ti Crashes with CUDA Illegal Memory Access
Xanth1Man · reddit · 2026-08-09
A developer using an RTX 3080 Ti (12GB) reported consistent crashes when attempting to run the MiniMax H3 model locally via ComfyUI. Tasks including t2v and i2v all fail with the error: CUDA error: an illegal memory access was encountered.
Despite extensive troubleshooting efforts—such as lowering sampling steps, integrating SageAttention and EasyCache for optimization, and updating GPU drivers—the issue persists. The post includes the full ComfyUI error log, seeking community assistance to resolve the memory access conflict.
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