spark/phases/phase-02-deep-research.md

Phase 2: Deep Research — Reviews, Official Docs, Community Data

Date: 2026-02-14 Goal: Fill gaps from Phase 1 by integrating official NVIDIA documentation, independent reviews, and community findings

What Was Done

1. Attempted to access Dell Owner's Manual PDF — blocked by 403 on Dell support site and manuals.plus
2. Found and ingested NVIDIA DGX Spark User Guide (HTML version at docs.nvidia.com) — the authoritative hardware/software reference
3. Ingested Jeff Geerling's review — power measurements, benchmarks, thermal analysis, networking throughput
4. Ingested ServeTheHome review — power draw by workload, noise levels, LLM benchmarks, port layout details
5. Ingested Tom's Hardware review — overall verdict, rating (4/5)
6. Ingested NVIDIA Developer Forums — SSD replacement details (M.2 2242 form factor confirmed)
7. Ingested ServeTheHome firmware article — Dell vs NVIDIA firmware signing, update procedures

Sources Added

• NVIDIA DGX Spark User Guide: Hardware Overview (docs.nvidia.com/dgx/dgx-spark/hardware.html)
• NVIDIA DGX Spark User Guide: System Overview (docs.nvidia.com/dgx/dgx-spark/system-overview.html)
• NVIDIA DGX Spark User Guide: First Boot (docs.nvidia.com/dgx/dgx-spark/first-boot.html)
• NVIDIA DGX Spark User Guide: UEFI Settings (docs.nvidia.com/dgx/dgx-spark/uefi-settings.html)
• NVIDIA DGX Spark User Guide: Spark Stacking (docs.nvidia.com/dgx/dgx-spark/spark-clustering.html)
• NVIDIA DGX Spark User Guide: Software (docs.nvidia.com/dgx/dgx-spark/software.html)
• Jeff Geerling: "Dell's version of the DGX Spark fixes pain points" (jeffgeerling.com)
• ServeTheHome: "NVIDIA DGX Spark Review" (servethehome.com) — pages 1 and 4
• ServeTheHome: "NVIDIA DGX Spark and Dell Partner GB10 Firmware" (servethehome.com)
• Tom's Hardware: "Nvidia DGX Spark review" (tomshardware.com)
• NVIDIA Developer Forums: "Exchange internal SSD" thread (forums.developer.nvidia.com)
• Storage Review teardown (referenced in forums)

Key Findings

Resolved 18 open questions:

• SSD is user-replaceable FRU (M.2 2242 PCIe Gen5)
• Memory: 256-bit, 16 channels
• Docker + NVIDIA Container Runtime pre-installed
• Environmental: 5-30°C, 10-90% humidity, up to 3,000m altitude
• Noise: < 40 dB at 1-1.5m
• Cooling: Dual-fan + dense heatsink, front-to-back airflow
• Firmware: apt + fwupdmgr (Dell uses different signed firmware from NVIDIA)
• PXE boot supported via UEFI
• First boot: 10-step wizard fully documented
• Stacking: Specific QSFP DAC cables documented, MPI + NCCL v2.28.3, ethernet-only
• Stacking is 2-node distributed cluster (NOT single logical device)
• QSFP ports usable for general 200GbE networking
• Benchmark data: Llama 3.2 3B ~100 tok/s, GPT-OSS-120B ~14.5 tok/s
• Dell design prevents thermal throttling (better than DGX Spark reference)
• Power draw profiled across all workload types
• HDMI display compatibility issue documented
• 2-year support guarantee
• Dell PSU is 280W vs DGX Spark 240W

New data added:

• RT Cores (4th gen), NVENC, NVDEC specs
• FP64 HPL benchmark: ~675 GFLOPS
• Gaming performance (Cyberpunk, Doom Eternal via FEX/Proton)
• USB ports are USB 3.2 Gen 2x2
• QSFP connected via x4 PCIe Gen 5
• Regulatory model: D21U / D21U001
• DGX Spark weight (1.2kg) vs Dell (1.31kg) differentiated
• UEFI menu structure documented
• Software stack: NVIDIA Sync, DGX Dashboard, AI Enterprise, NGC confirmed
• Stacking cable part numbers (Amphenol, Luxshare)
• Stacking IP configuration (192.168.100.10/11)

What Changed

All 12 context files updated. open-questions.md rebuilt with 18 resolved items.

Remaining Gaps

• Dell Owner's Manual PDF still not ingested (403 from all sources — needs manual download)
• DGX Spark UEFI Manual (separate document, not yet found online)
• Exact TFLOPS for FP8/FP16/FP32 still inferred
• No Llama 3.3 70B specific tokens/sec benchmark
• No fine-tuning benchmarks
• No image generation benchmarks