ThinkingCap-Qwen3.6-27B — ROCmFPX × MagicQuant hybrid GGUFs (AMD-native, fork-only)

⚠️ These files do NOT load on standard llama.cpp

They use AMD-native *_ROCMFPX tensor types from the experimental ciru-ai/ROCmFPX llama.cpp fork (build from source). For files that work with stock llama.cpp / LM Studio / Ollama, use the sibling repo: lmcoleman/ThinkingCap-Qwen3.6-27B-MagicQuant-GGUF.

ROCm-optimized versions of MagicQuant-optimized quants: each file reproduces a MagicQuant evolutionary-search winner's per-tensor-group precision layout (selected by measured perplexity + KL divergence against the BF16 base) re-expressed in ROCmFPX's AMD-native tensor types via llama-quantize --tensor-type-file. Tuned for and benchmarked on AMD Strix Halo (Radeon 8060S iGPU, gfx1151, unified memory).

Vision-capable. The base is a Qwen3.5-VL vision-language model. These are the quantized text model in ROCmFPX types; pair any with the included mmproj-ThinkingCap-Qwen3.6-27B-f16.gguf (f16 vision projector, 0.86 GiB) for image input: llama-server -m <file>.gguf --mmproj mmproj-ThinkingCap-Qwen3.6-27B-f16.gguf -ngl 99 -fa on.

Files

File Size Layout source (measured PPL of the K-quant twin)
...ROCMFPX-MQ-Q4.gguf 14.64 GiB MagicQuant Q4 tier (PPL 6.8931)
...ROCMFPX-MQ-Q5.gguf 20.69 GiB MagicQuant Q5 tier (PPL 6.8270)
...ROCMFPX-MQ-Q6.gguf 23.48 GiB MagicQuant Q6 tier (PPL 6.8304)

PPL figures are the measured values of the K-quant layout each file reproduces (BF16 baseline 6.7803, wikitext-2, 100 chunks, ctx 512); the ROCmFPX re-expression was not separately PPL-measured. The embedded MTP head is preserved.

Recommended tier: MQ-Q5. Its layout source (uniform Q6_K) measured equal-or-better than the Q6 tier's hybrid (6.8270 vs 6.8304 — a 0.003 gap against ±0.107 measurement noise, i.e. a statistical tie) with better mean KL divergence, at 2.8 GiB smaller. The MQ-Q6 file's extra size buys nothing measurable here; tiers are independent size-band search winners, not supersets, so small inversions like this are expected behavior.

MTP speculative decoding

With the fork's llama-server:

llama-server -m ThinkingCap-Qwen3.6-27B-ROCMFPX-MQ-Q5.gguf \
  -md ThinkingCap-Qwen3.6-27B-ROCMFPX-MQ-Q5.gguf --spec-type draft-mtp \
  -c 8192 -ngl 99 -fa on -ctk q8_0 -ctv q8_0

Notes

  • Chat template embedded; architecture qwen35. No patching needed.
  • Experimental upstream research build. Known-good commit these files were built and validated with:
git clone https://github.com/ciru-ai/ROCmFPX && cd ROCmFPX
git checkout 221402af8574faf652b101b6afe225a3f329561f
  • Source: a Qwen3.6-27B finetune (efficient thinking, ~50% fewer thinking tokens).
  • Built with Foundry + MagicQuant: evolutionary per-group hybrid search (measured, imatrix-weighted, KL-guarded), layouts exported to ROCmFPX types per group.
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