Qwen3.8 27B

User reports NPU-assisted prefill on a Strix Halo (Ryzen AI MAX+ 395) box using a fork of Gufo, with the GPU and NPU splitting each projection. Prefill reaches 806 t/s on Qwen3.8-27B, 3,276 t/s on Qwen3.6-35B-A3B and 2,125 t/s on Qwen3.8 Flash-Next. Decode with speculative decoding (MTP, DFlash2, or an auto mode that picks per request) hits up to about 160 tok/s on code and JSON with the 35B-A3B. Quality checked against llama.cpp on CPU showed no measurable perplexity change on the 27B or 35B. The GPU fabric clock must be held at max or the GPU and NPU together can hang the machine; Linux only, gfx1151 only.