This build is what works best on my 128 GB LPDDR5X AMD Strix Halo (Ryzen AI MAX+ 395, Radeon 8060S) under Windows 11, with llama.cpp on Vulkan. It is my daily driver for agentic work. It is unsloth's UD-Q4KXL with one change: the 48 expert down projections are IQ4NL instead of Q51, quantized from Qwen's original BF16 weights with unsloth's importance matrix. That takes the file from 111.3 GB to 102.5 GB. This repo used to hold DN4, the first version of this file, published 2026-09-05. DN4 made the same 48 tensors by requantizing unsloth's Q51 copies, and DN4B makes them from BF16. Same size, same speed, same memory, and measurably closer to the original model. DN4 is still downloadable from…