H3 OOM Issues on RTX 4070 12GB Despite VRAM Clearing

Bananasutra · reddit · 2026-08-20

User experiences severe OOM errors running H3 workflows on an RTX 4070 12GB. Even low-res tasks (360p 2s) crash, while 360p 3s can take over an hour. Troubleshooting steps like restarting, updating drivers, and using the 'VRAM Debug' node (which reported freeing 10GB) failed to resolve the issue. Other workflows like Wan run perfectly fine. The user is seeking causes or 12GB-optimized H3 workflows.

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