# Nvidia DGX Spark encrypted firmware slows Linux inference to 35% of Windows speed

Digest AI · Hardware & Compute · published 2026-11-01T00:00:00Z

Canonical: https://digestai.news/story/nvidia-dgx-spark-encrypted-firmware-slows-linux-inference-to-35-of-win

## Summary

A detailed test of the MSI Prestige N16 Flip AI Plus laptop, part of Nvidia's RTX Spark platform, shows that native Linux inference runs at roughly 35% of Windows performance when the laptop is plugged in. The cause is an encrypted firmware power table managed by a Windows-only component called the Nvidia Platform Controllers and Framework, which balances power between CPU and GPU. Linux cannot decrypt this table, so the GPU clock locks around 780 MHz instead of the 2.2 GHz seen on Windows. Unplugged, Linux performance matches Windows. WSL works as a practical workaround because it uses the Windows driver stack. A fix requires Nvidia to port the power management logic to its Linux driver. The laptop also reserves 96GB of unified memory for the GPU by default, adjustable only from Windows.

## Key points

- GPU clock locked to ~780 MHz on Linux when plugged in vs ~2.2 GHz on Windows
- Root cause: encrypted firmware power table only Windows can decrypt

## Why it matters

Developers buying RTX Spark laptops for Linux-first AI tooling lose most GPU performance on wall power unless they use WSL or wait for a Nvidia driver fix.

## Sources

1. [Nvidia DGX Spark encrypted firmware slows inference speed to 35% on Linux](https://mindstudio.ai/blog/linux-nvidia-rtx-spark-laptop) (mindstudio.ai, 2026-11-01)

Part of the developing story: [Intel's LLM Scaling Saga with vLLM Advances](https://digestai.news/thread/intel-releases-llm-scaler-vllm-pv-1-5) (4 stories)

## Cite

Digest AI, "Nvidia DGX Spark encrypted firmware slows Linux inference to 35% of Windows speed", 1 November 2026, https://digestai.news/story/nvidia-dgx-spark-encrypted-firmware-slows-linux-inference-to-35-of-win

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