ComfyUI-INT8-Fast-ROCM-ConvRot
MiniMax H3 INT8 Fast loader for AMD ROCm; validated FL2VA and Ref2VA on RX 7900 XTX.
Nodes (8)
MiniMax H3 INT8 Fast for AMD ROCm
DBJ's validated MiniMax H3 loader for the official prequantized INT8 ConvRot FL2VA and Ref2VA diffusion models on AMD ROCm.
comfy node install minimax-h3-int8-fast-rocm
What this release does
MiniMaxH3INT8FastLoader uses ComfyUI's native MiniMax H3 model loading so the model's BF16, FP16, and FP32 precision-sensitive conditioning, AdaLN, patch, audio, and video output layers remain intact. Only the checkpoint's intended INT8 ConvRot transformer projections use the scoped ROCm fast path.
Validated models:
Validated environment: Linux, ComfyUI 0.32.0, comfy-kitchen 0.2.31, and RX 7900 XTX/gfx1100. Other GPUs and ComfyUI versions are unvalidated.
LoRA
For a quantized H3 base, place ComfyUI's LoraLoaderBypassModelOnly immediately after this loader. ComfyUI-format H3 LoRAs add their residual without rewriting the INT8 base weights.
MiniMaxH3INT8FastLoader
→ LoraLoaderBypassModelOnly (optional)
→ ModelAttentionBackend (comfy kitchen attention)
→ MiniMaxH3FastPatch (optional)
→ MiniMaxH3BlockCacheT8 (optional)
→ MiniMaxH3SigmaShift
→ scheduler / guider / sampler
Upstream Turbo LoRAs: lightx2v/Minimax-h3-Turbo. Match FL2V LoRAs with FL2VA and Ref2V LoRAs with Ref2VA, and use the LoRA's stated 4-step or 8-step schedule rather than this release's standard 20-step validation schedule.
Companion packages
Both accelerators are approximate and opt-in. The INT8 loader is the quality baseline.
Provenance
This release is derived from patientx/ComfyUI-INT8-Fast-ROCM, pinned at f8cff25e7fb1c5f873ccf46bacb06698a89d774e. See H3_COMMUNITY_R01.md for the frozen release details.