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

u/Extension-Bid-639 2026-09-04 UTC

A user reports improving Qwen3.8-Flash-Next decode speed from 25–29 t/s to 37–41 t/s on a dual RTX 3090 + DDR4 system by combining UD-Q4_K_XL quantization, expert cache, and