Qwen3.5 122B (10B active)

on AMD Strix Halo 128GB · llama.cpp b8171 / c17dce4f / Vulkan RADV

Oct 14, 2026

Throughput

22.6 t/s gen · 247.2 tokens/s prompt processing (prefill)Prompt processing measures input prefill speed; it does not tell you the time to first token.

Quant

UD-Q4_K_XL (GGUF)

System RAM

128 GB

Summary

User reports Qwen3.5 122B-A10B at 22.6 t/s generation and 247.2 t/s prompt processing on an AMD Strix Halo 128GB machine. Setup is llama-bench build b8171 with the Vulkan backend, UD-Q4_K_XL quant, ngl 99, and a Radeon 8060S Graphics (RADV GFX1151) device. The model is the 122B-A10B artifact at 63.65 GiB; PP512 is 512 benchmark prompt tokens and TG128 is 128 evaluation steps, so the two rates are not a same-request pair.