Benchmarking the new b9200 update optimizing Qwen

The author benchmarks the new b9200 release of llama‑cpp with the Qwen 3.6 27B‑IQ4_NL.gguf model on an RTX 3090 and Ryzen 7 5700G. The b9200 build fixes the memory‑traffic overhead that previously copied full logits for every token during prompt processing. Default MTP flags (--spec‑draft‑n‑max 6, --spec‑draft‑p‑min 0.75) caused poor performance for agentic loops, with prompt speeds around 560 t/s and token generation 17 t/s. By limiting to a single parallel slot, dropping the lookahead to 3, and removing the p‑min threshold, the optimized launch command boosts prompt processing to ~611 t/s and peak token generation to 27.44 t/s. Draft acceptance rates rise from 22‑26 % to ~70‑77 %. The new launch flags include --spec‑type draft‑mtp, --spec‑draft‑n‑max 3, --ctx‑size 65536, --parallel 1, --flash‑attn on, --cache‑type‑k q8_0, and --cache‑type‑v q8_0. The author notes that an undervolted RTX 3090 can still reach nearly 30 t/s on a dense 27B model when the VRAM bus is unclogged. The update is especially beneficial for strict, multi‑turn agentic workflows.