Arch Linux Runs on Nvidia RTX Spark Laptop, Reports 116 GiB Unified Pool
Arch Linux ARM runs on Nvidia's RTX Spark laptop, reporting a 116 GiB unified memory pool and matching Windows in 7-Zip, though the comparison uses published Windows results and different test conditions.
Josephine Pfeiffer installed Arch Linux ARM on an ASUS ProArt P16 with Nvidia's RTX Spark, after finding official support Windows-only. The port reports 116.0 GiB as both system RAM and CUDA total from one pool, and in native ARM64 7-Zip it roughly matches published Windows results, about 5% ahead on 20-thread compression and within 1.2% on a single thread.
The CPU comparison uses published Windows figures rather than the same machine, and the HP review behind them does not state its 7-Zip version or dictionary size, so the percentages compare two laptop setups rather than isolating the operating system. Windows instead splits the pool into dedicated GPU, shared and CPU-only regions, which forces a reservation change and reboot to move capacity between CPU and GPU work.
The bits that matter
- 7-Zip medians: single-thread compression 7.221 GIPS versus 7.31 for StorageReview's HP OmniBook Ultra 16 with the same 20-core N1X (-1.2%), decompression 10.779 versus 10.87 (-0.8%); 20-thread compression 165.754 versus 157.9 (+5.0%), decompression 148.471 versus 144.5 (+2.7%). ComputerBase's Windows ProArt P16 scored 155.774 GIPS, inside the three-run range of 155.759-157.193.
- Frandroid's Windows ProArt reached 96 GiB dedicated and 109.7 GiB CUDA total including shared memory, against Linux's 116.0 GiB, about 6.3 GiB more. The stated goal is one large pool available to CPU work too, without moving the reservation slider and rebooting between workloads.
- vLLM ran Qwen3.8-Flash-Next-FP4-Local with B12X CUDA kernels, mixed quantization and FP8 KV cache: 68.2 GiB for model loading, 21.1 GiB for KV cache, and about 16 minutes before the first request. The incident-log task read 9,775 tokens and returned correct answers in 5.768 s median.
- Code-review generation reached 30.9 tokens/s median, against Frandroid's Windows ProArt at 29.4 and 31.4 tokens/s, though prompts, quants, runtimes and timing methods differ. Four concurrent reviews produced 86.6 output tokens/s combined; 150 requests over ten minutes all passed, with median response times growing under 1.6%.
- The bootable USB extends Archinstall 4.5 and includes hash-pinned build inputs, ACPI overrides dumped from the laptop, a patched hid-asus driver, an audio machine driver, and ASUS speaker firmware extracted locally. Hardware packages are signed with Pfeiffer's Arch Linux Package Maintainer key.
Discussion analysis
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Use cases for a $6K RTX Spark laptop
A $6K RTX Spark laptop faces competition from mini PCs with AMD Ryzen 495 or 395 and 96-192 GB of memory, which can be paired with a cheaper, lighter laptop over a remote connection. The flying-coding scenario weakens as in-flight connectivity improves; the power brick can trip coach power outlets, and local AI cannot run long on battery. Gaming has better options with dedicated GPUs.
Mini PCs and shared-memory inference
Mini PCs with AMD Ryzen 495 or 395 and 96-192 GB of memory offer comparable capacity for similar money, so the Nvidia machine's differentiator is a pool shared between system and GPU, as Apple does, aimed at local inference. The core design is approaching three years old, which undercuts the premium.
ARM64 efficiency versus software support
ARM64 brings more efficient power management but thinner software support than x86_64, and the AMD stack may carry overhead translating Nvidia-native instructions, a claim the commenter could not confirm. The Nvidia design shares system and GPU memory like Apple silicon, aimed at local inference.
Premium pricing questioned
The $6K price draws skepticism, with mini PCs offering comparable memory and capability for similar money. The core design is approaching three years old, and the premium Nvidia charges is seen as unjustified.
Whether Windows requires a Microsoft account
Whether Windows on these laptops requires a Microsoft account is raised as an open question, with a reply noting accounts are free to create. The objection is to tying a cloud account to a desktop operating system, which the Linux installation avoids.
Novelty and learning value
The write-up's novelty is questioned: buying and using hardware is not itself a challenge, and consumption is seen as uninspiring. The ARM64 port and hardware review may be the point of interest for others.