llamaperf

Qwen3.8 27B Swift-1.5-Uncensored-Dynamic

on Strix Halo 64GB · llama.cpp · 102,400 ctx

Oct 3, 2026
Throughput
22.6 t/s gen · 63.6 tokens/s prompt processing (prefill)Prompt processing measures input prefill speed; it does not tell you the time to first token.
Quant
Q5_K_M (GGUF)
KV cache
f16
Flash Attention
on
System RAM
64 GB

Summary

User reports Qwen3.8-27B at 22.65 t/s generation and 63.57 t/s prefill on a Strix Halo 395 with 64GB. Setup is llama.cpp (Vulkan build) with a Q5_K_M GGUF and f16 KV cache, 102400 context, MTP speculative decoding with draft acceptance 0.68425. User asks for advice on the best Windows-based setup to reach 20+ tok/s on this model.