Summary
User reports Qwen3.8-27B at about 1180 t/s prompt processing and 95 t/s decode on an M5 Ultra Studio with 96GB of RAM.
The model runs with MTP speculation and an oQ4e quant; SSD cache is disabled and the hot cache is set to 4GB with a 10% hit rate.
System RAM sits just over 50% during heavy work, and the user asks whether a larger hot cache would be reasonable.