DeepSeek-V4-Flash-0731 · affinity container · 2.875 bpw experts

A quantised container of deepseek-ai/DeepSeek-V4-Flash-0731 for the affinity inference engine, which runs DeepSeek-V4-Flash on one or two AMD RDNA4 GPUs (gfx1201, e.g. Radeon AI PRO R9700).

This is not a GGUF, safetensors or vLLM checkpoint. It loads only in affinity (upstream, or the fork at neuromaniacMD/affinity, branch v4-fixes, which is what these numbers were measured on).

It saves you the 149 GB checkpoint download and the ~2.5 h quantise. The container was produced by upstream's own aff-quantize (commit a48b72e), exactly as upstream's README describes, so it loads in upstream's engine too.

Files

Reassemble and verify:

hf download neuromaniacmd/DeepSeek-V4-Flash-0731-affinity-2.875bpw --local-dir .
cat model-0731.aff.part-* > model-0731.aff && rm model-0731.aff.part-*
sha256sum -c SHA256SUMS --ignore-missing

You also need the tokenizer from the original repo: hf download deepseek-ai/DeepSeek-V4-Flash-0731 tokenizer.json --local-dir DeepSeek-V4-Flash-0731.

How it was made

• Source: deepseek-ai/DeepSeek-V4-Flash-0731 (HF commit 7872f01b1d), every shard's sha256 checked against the Hub.
• Only the routed experts are quantised: 2.875 bpw with affinity's codebook quant (2 variants x 1,024 entries), imatrix-weighted. Dense weights stay in the checkpoint's FP8 and the embedding/head in bf16.
• Imatrix: imatrix/imatrix-v4-flash.dat from teamblobfish/DeepSeek-V4-Flash-GGUF, the one upstream's README uses. It was computed on the original V4-Flash; 0731 has the same architecture.

aff-quantize --src DeepSeek-V4-Flash-0731 --out model-0731.aff --imatrix imatrix-v4-flash.dat --threads 24
aff-quantize --src DeepSeek-V4-Flash-0731 --out model-0731.dspark.aff --dspark --codebook model-0731.aff

Run (two cards, OpenAI-compatible server)

Build the engine with the fork's docker/Dockerfile (AMD TheRock ROCm 7.14; the host needs no ROCm):

docker run --rm --device=/dev/kfd --device=/dev/dri --security-opt label=disable --network host \
  --ipc host --ulimit memlock=-1:-1 --shm-size 16g -e HIP_VISIBLE_DEVICES=0,1 \
  -v /path/to/models:/aff affinity:v4-fixes \
    -m /aff/model-0731.aff --tokenizer /aff/DeepSeek-V4-Flash-0731/tokenizer.json \
    --gpus 2 --host-pool-mib 56000 --dspark on --kv-size 262144 --kv-commit 262144 \
    --ui plain --host 127.0.0.1 --port 8080

The engine loads <model>.dspark.aff from next to the main container automatically. Needs ~64 GB of host RAM for the non-resident experts (56 GB pinned pool here). Thinking is on by default. The server raises a request's max_tokens to at least 256,000 so reasoning is never cut off; pass --max-tokens-floor 0 if clients must be able to cap output.

Measured (two R9700s, 32 GiB each, 2026-09-23)

Sampling: use the model card's (temperature 1.0, top_p 1.0; the server's default when a request sends none is 1.0 / 0.95). At temperature 0.6 this quant falls into reasoning loops (runs to the token cap at >90 % draft acceptance).

Credits and license

Model by DeepSeek (MIT). Engine by Yoshi Exeler (StillDeadcode/affinity, MIT). Imatrix by teamblobfish. This container is distributed under the same MIT license as the model (LICENSE).