llamaperf

Qwen3 8B

on AMD RX 6700 XT · llama.cpp

Tone: positiveAMD hardware
Oct 9, 2026
Throughput
61.0 t/s gen · 851.0 tokens/s prompt processing (prefill)Prompt processing measures input prefill speed; it does not tell you the time to first token.
Quant
Q4_K_M (GGUF)
KV cache
f16
VRAM reported
12 GB

Summary

User reports Qwen3-8B Q4_K_M at 61 t/s generation and 851 t/s prompt on an RX 6700 XT 12 GB. Setup is the bundled llama.cpp (0.85.5) with the AMD Flash Attention kernel, KV cache f16, measured with pp512 / tg128. The project's headline claim is that the same card goes from 0.6-2.6 t/s under stock llama.cpp to ~61 t/s with ToshLLM. The page also lists Qwen3.6-35B-A3B Q4_K_S at 475 t/s prompt / 29 t/s generation with --n-cpu-moe 24, and community rows including a 122B-A10B MoE across four W6800X GPUs at 226 t/s prompt / 26 t/s generation.