DeepSeek V4 Flash 284B (13B active)

User reports DeepSeek-V4-Flash at 13.61 t/s generation and 338.41 t/s prompt eval on 2 x RTX PRO 4000 with 48 GiB VRAM and 160 GiB system RAM. Setup is llama.cpp with an MXFP4/Q8_0 GGUF (about 146 GiB) at 32768 context, using --fit on and --no-mmap. A llama-batched-bench sweep from 8K to 1M context shows prompt throughput falling from 448.57 t/s to 65.97 t/s and generation from 19.20 t/s to 6.56 t/s; without hc-ops the same sweep was slower (322.50 t/s prompt, 14.62 t/s generation at 8K). KLD against the base logits is 0.422277 mean for the Q2 quant and 0.115089 for the Q4 quant.