Gemma 4-E4B / Vulkan RADV native PP512/TG128

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

Oct 13, 2026

Throughput

59.0 t/s gen · 1828.0 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

System RAM

128 GB

Summary

User reports Gemma-4-E4B at 59 t/s generation and 1828 t/s prompt processing on an AMD Strix Halo 128GB system with a single Radeon 8060S iGPU. Setup is llama.cpp with UD-Q4_K_XL, full offload, batch 2048 and flash attention, using the RADV Vulkan backend. The figures are separate pp512 and tg128 microbenchmarks, not one end-to-end request; the AMDVLK backend gave 491 t/s prompt and 57 t/s generation.