Qwen3.8 125B (6B active) Flash-Next

User reports Qwen3.8 Flash-Next at 16.5 t/s generation and 350 t/s prompt processing on an RTX 4080 16GB with 64GB system RAM, at 131k context. Setup is llama.cpp built from a pr-mtp-fix branch with the Unsloth MTP head as the draft model, AtomicChat AD-4.27bpw Q4_K_M target weights, and a Q8 KV cache. The --spec-draft-cpu-moe flag keeps draft experts in RAM so the target's hot experts fit in the 16GB of VRAM. An IQ4_XS quant was also tested and reached about 10 t/s.