UPDATE: Qwen3.8-Flash-Next on 2x3090 + DDR4 (Part 2): 25-29 -> 37-41 t/s decode (UD-Q4_K_XL + expert cache + MTP), plus a branch you can build

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This is a follow-up to my post from yesterday (17 -> 25-29 t/s with the expert cache PR). Same box: 2x RTX 3090 on PCIe 3.0, dual Xeon E5-2696 v4, 188 GB DDR4-2133 LRDIMM, llama.cpp, full 261k context, f16 KV, all 48 expert layers in host RAM, everything else on the GPUs. Since then I switched quants, stacked MTP on top of the cache, fixed the load time, found a bug in the cache PR and found out my RAM was thermal throttling (Now i gotta buy an additional case fan lol). Numbers are all from the