llamaperf

Qwen3.8 27B

on Intel Arc Pro B70 · llama.cpp

Intel hardware
Oct 7, 2026
Throughput
16.7 t/s gen · 1047.0 tokens/s prompt processing (prefill)Prompt processing measures input prefill speed; it does not tell you the time to first token.
Quant
UD-Q8_K_L (GGUF)

Summary

User reports Qwen3.8-27B-UD-Q8_K_L at 16.66 t/s generation and 1046.98 t/s prompt processing on an Intel Arc Pro B70 GPU. Setup is llama.cpp with the SYCL backend, FP16 build, flash attention off, single GPU, on Windows 11 with a Ryzen 9 5950X host. With flash attention on the same setup gives 16.63 t/s generation and 572.10 t/s prompt processing; FP32 builds give 16.64 t/s and 335.62 t/s without FA, and 16.60 t/s and 300.36 t/s with FA.