llamaperf

Qwen3.5 35B (3B active)

on AMD Strix Halo 128GB · llama.cpp / Vulkan RADV / build unknown

AMD hardware
Oct 13, 2026
Throughput
59.8 t/s gen · 1017.0 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)
Flash Attention
on
System RAM
128 GB

Summary

User reports Qwen3.5-35B-A3B at 59.8 t/s generation and 1017 t/s prompt processing on a single Radeon 8060S iGPU in an AMD Strix Halo system with 128 GB unified memory. Setup is llama.cpp via RADV with the Unsloth UD-Q4_K_XL quant, full offload, batch 2048, flash attention and 32 threads. The figures are separate llama-bench pp512 and tg128 microbenchmarks, not one end-to-end request; the same campaign lists AMDVLK at 686.0 t/s prompt and 60.4 t/s generation.