Intel Arc B70 GPU successfully runs local LLMs on legacy HP Z640 workstation after BIOS configuration fixes

User upgraded HP Z640 workstation from Titan X Pascal to Intel Arc B70 GPU for local LLM inference

Required extensive BIOS tweaking and monitor connection during boot to resolve initialization issues

Successfully runs Qwen3.6-35B-A3B-UD-Q4_K_XL.gguf model via llama.cpp with ~130k context window

SYCL backend outperforms Vulkan backend for this setup; vllm and other runtimes failed to work

User running Ubuntu 26.04 (beta) on dual Xeon E5-V4 system with 100GB RAM