Tess-4-27B-ROCmFPX-GGUF

⚠️ 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).

Derivative of Tess-4-27B, quantized to AMD-native ROCmFPX formats (fork-only) tuned for Strix Halo (gfx1151).

Base Model

This is a derivative of Tess-4-27B. All credit for the base model architecture and weights goes to the original authors. The base model's license applies to this derivative.

ROCmFPX (AMD-native, fork-only)

These GGUFs use AMD-native quantization schemes from the experimental ciru-ai/ROCmFPX llama.cpp fork, tuned for and benchmarked on AMD Strix Halo (Radeon 8060S iGPU, gfx1151, unified memory):

  • ROCmFP3/4/6/8 tensor types with straight and "agent" presets (agent presets keep tool-calling / JSON-structured output reliable at low bit-widths)
  • Files load only on the fork -- build it from source; it is an experimental upstream research build, so pin a commit that works

GGUF Files

File Size Quant
Tess-4-27B-Q3_0_ROCMFPX.gguf 15.1 GB ROCmFP3 (fork-only)
Tess-4-27B-Q3_0_ROCMFPX_AGENT.gguf 19.5 GB ROCmFP3 (fork-only), agent preset
Tess-4-27B-Q4_0_ROCMFP4.gguf 17.7 GB ROCmFP4 (fork-only)
Tess-4-27B-Q4_0_ROCMFP4_COHERENT.gguf 15.7 GB ROCmFP4 (fork-only), coherent preset
Tess-4-27B-Q6_0_ROCMFPX.gguf 22.5 GB ROCmFP6 (fork-only)
Tess-4-27B-Q6_0_ROCMFPX_AGENT.gguf 25.3 GB ROCmFP6 (fork-only), agent preset
Tess-4-27B-Q8_0_ROCMFPX.gguf 28.2 GB ROCmFP8 (fork-only)
Tess-4-27B-Q8_0_ROCMFPX_AGENT.gguf 28.7 GB ROCmFP8 (fork-only), agent preset

Usage

Requires a from-source build of the ROCmFPX fork (stock llama.cpp, LM Studio, and Ollama cannot load these files):

# Interactive chat
llama-cli -m Tess-4-27B-Q3_0_ROCMFPX.gguf -c 8192 -cnv

# Server mode
llama-server -m Tess-4-27B-Q3_0_ROCMFPX.gguf -c 8192 --port 8080 -ngl 99 -fa on

Serving: MTP Speculative Decoding

This model includes MTP ("nextn") draft tensors, enabling self-speculative decoding -- measured ~1.6-1.9x faster generation with a ~95% first-token accept rate (no separate draft model needed; it drafts from itself):

llama-server -m Tess-4-27B-Q3_0_ROCMFPX.gguf -c 8192 --port 8080 --host 127.0.0.1 -ngl 99 -md Tess-4-27B-Q3_0_ROCMFPX.gguf --spec-type draft-mtp -ctk q8_0 -ctv q8_0 -fa on

Memory cost: MTP needs its own draft context alongside the main context, so serving with it uses roughly 2x the model's memory compared to serving without -md/--spec-type draft-mtp.

Caveats

  • The base model's license (apache-2.0) applies to all derivative files
  • Fork-only files: stock llama.cpp, LM Studio, and Ollama cannot load these -- build ciru-ai/ROCmFPX from source
  • Quantization reduces precision -- verify outputs for your specific use case

Limitations

  • Quantized models may exhibit subtle differences from the full-precision fine-tune
  • This model inherits any limitations and biases present in the base model

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