Gemma 4-26B-A4B / Vulkan RADV native PP512/TG128

User reports Gemma-4-26B-A4B at 47.7 t/s generation and 1303 t/s prompt processing on an AMD Strix Halo 128GB system with a single Radeon 8060S iGPU. Setup is llama.cpp via RADV with Q8_0, full offload (ngl 999), batch 2048 and flash attention, using the 120 GB soft GPU-memory cap. The figures are separate llama-bench pp512 and tg128 microbenchmarks, not one end-to-end request; repetition count, spread and context allocation are not published.