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16 GB cards: use 11.5G; 12.5G/13.6G OOM by default, --reserve-vram 1.5 workaround (encoder step only tested)

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  1. README.md +2 -1
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@@ -43,7 +43,8 @@ included yet.
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  - The visual tower (F16) is merged in because ComfyUI recognizes the H3 encoder by `visual.deepstack_merger_list.*` +
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  `model.layers.49.*`. Its 5-D `patch_embed` weight is stored the ComfyUI-GGUF way (flattened +
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  `comfy.gguf.orig_shape`), so current `gguf` versions read it.
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- - **Tested on a 16 GB card** (RTX 5070 Ti, ComfyUI, H3 FL2VA turbo 4-step DiT, 832×480 × 61 frames, `--disable-dynamic-vram --reserve-vram 0.15`): the **11.5G** file runs (whole clip ~45–65 s, GPU peak ≈ 15.0 GB). The **12.5G and 13.6G files ran out of memory** while loading the encoder on that card — use them on 20 GB+ cards. ComfyUI's default dynamic VRAM may let them offload on 16 GB; not tested.
 
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  ## How the sizes were spent
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  - The visual tower (F16) is merged in because ComfyUI recognizes the H3 encoder by `visual.deepstack_merger_list.*` +
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  `model.layers.49.*`. Its 5-D `patch_embed` weight is stored the ComfyUI-GGUF way (flattened +
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  `comfy.gguf.orig_shape`), so current `gguf` versions read it.
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+ - **16 GB cards → use the 11.5G file.** Tested on an RTX 5070 Ti 16 GB (ComfyUI, H3 FL2VA turbo 4-step DiT, euler + sigma shift 12/3, 1344×768 × 61 frames): full clips render with default settings, ~75 s per clip, GPU peak ≈ 15 GB.
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+ - **12.5G / 13.6G on a 16 GB card:** with ComfyUI's default settings the encoder runs out of memory (`torch.OutOfMemoryError`, no video). Starting ComfyUI with `--reserve-vram 1.5` makes it keep part of the encoder in system RAM: the encoding step then passes (first prompt 12 s / 19 s, later ones ~4 s), but a full clip with that setting was **not** tested — the DiT may then be pushed to offload too. On 20 GB+ cards they load normally.
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  ## How the sizes were spent
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