Extensions/MiniMax H3 Sol-Attn (ROCm)
ComfyUI Extension

MiniMax H3 Sol-Attn (ROCm)

Validated MiniMax H3 long-sequence Sol-Attn patch for AMD ROCm with conservative accepted-block routing.

By DrBearJew·Created about a month ago·Updated about a month ago· 2
DrBearJew/ComfyUI-SolAttn_triton
Nodes3
On cloudLocal install
Categorysol_attn/minimax_h3, sol_attn
Stars2
Updatedabout a month ago

Nodes (3)

MiniMax H3 Long-Sequence Attention (Experimental)

The speed is real, but you have to opt in

sol_attn/minimax_h3
Sol-Attn Block Probe

Find the blocks that hate being sparsified

sol_attn
Patch Sol-Attn

Skip most of attention and barely notice

sol_attn
Readme

MiniMax H3 Sol-Attn for AMD ROCm

DBJ's conservative, opt-in long-sequence Sol-Attn patch for native ComfyUI MiniMax H3 on AMD ROCm.

ComfyUI Registry

comfy node install minimax-h3-sol-attn-rocm

What this release does

MiniMaxH3FastPatch follows ComfyUI's ModelAttentionBackend, leaving Comfy Kitchen attention as the dense backend and fallback. It activates only on eligible MiniMax H3 self-attention calls of at least 12,288 tokens.

Validated policy:

  • 90% estimated attention-mass route coverage
  • 50% minimum exact-block floor
  • exact conditioning, reference, and target-audio rows
  • INT8 QK/PV attention arithmetic
  • dense fallback on unsupported or malformed calls

The patch is approximate and disabled unless the user explicitly enables it.

Validated environment: Linux, ComfyUI 0.32.0, comfy-kitchen 0.2.31, and RX 7900 XTX/gfx1100. Other GPUs and ComfyUI versions are unvalidated.

Placement and LoRA

MiniMaxH3INT8FastLoader
  → LoraLoaderBypassModelOnly (optional)
  → ModelAttentionBackend (comfy kitchen attention)
  → MiniMaxH3FastPatch
  → MiniMaxH3BlockCacheT8 (optional)
  → MiniMaxH3SigmaShift
  → scheduler / guider / sampler

A fixed-strength bypass LoRA is compatible because Sol-Attn sees the resulting current-call Q/K/V tensors. Match the LoRA variant and its 4-step or 8-step schedule to the FL2VA or Ref2VA base.

Companion packages

Provenance and license boundary

This release is derived from kijai/ComfyUI-SolAttn_triton, pinned at 0e334dc981cfe3b0ed926ee13ad43f64914b7f5b. See H3_COMMUNITY_R01.md for frozen release details.

The upstream repository does not currently declare a software license. This fork does not add or imply one.