DeepSeek V4 Flash 284B (13B active)

User reports DeepSeek-V4-Flash at 15.4 tok/s decode and 142.30 tok/s prefill at 2,048 tokens of context on a Ryzen AI Max+ PRO 395 (Strix Halo) with 128 GB unified memory. Setup is the ds4 engine with an IQ2XXS-w2Q2K-AProjQ8-SExpQ8-OutQ8 GGUF (81 GB), 32,768-token context, ROCm 7.1.1; decode falls 12% from 2K to 32K while prefill stays flat. A second model, Qwen3.8-Flash-Next UD-IQ4_XS (88 GB) under Strata 0.1.40, decodes at 39.0 to 40.9 tok/s and prefills a 6,786-token prompt at 343 to 367 tok/s, dropping to 30.4 tok/s each with two requests in parallel. The same engine measured 8.7 tok/s while another model's worker held 41 GiB of VRAM and 23 GB of RAM, against 39.0 tok/s on an exclusive box.