{
  "schema_version": 1,
  "name": "Quarkpad paired GPU load-log comparison",
  "updated_at": "2026-08-17",
  "status": "OWNER COMPARISON RECORD - NOT SHOP PROOF",
  "scope": "Browser-local comparison of two fixed Quarkpad NVIDIA GPU load logs from the same one to eight devices.",
  "dependency": "/data/gpu-load-log-standard.json",
  "required_matches": [
    "same exact GPU set and PCI bus IDs",
    "same physical slots and case",
    "same workload and power setting",
    "same airflow direction",
    "both runs watched without a stop flag",
    "both runs pass the 20-minute, final-five-minute, and 80-percent load gates"
  ],
  "comparison_limits": {
    "maximum_ambient_difference_c": 3,
    "maximum_observed_power_difference_w": 5,
    "maximum_observed_power_difference_percent": 5,
    "maximum_utilization_difference_percentage_points": 5
  },
  "outcomes": [
    {
      "key": "incomplete",
      "meaning": "A fixed log or required comparison fact is missing or invalid."
    },
    {
      "key": "recheck",
      "meaning": "Both runs do not meet every pairing, duration, ambient, load, or observed-power gate, so no difference is calculated."
    },
    {
      "key": "stop",
      "meaning": "The owner saw a slowdown, fan, cable, airflow, or rising-temperature problem in at least one run."
    },
    {
      "key": "owner_compared",
      "meaning": "The two owner logs meet the minimum pairing gates. The result is not verified shop evidence."
    }
  ],
  "calculations": [
    "per-device change in final five-minute temperature rise above entered ambient",
    "change in hottest-device rise above ambient",
    "change in steady temperature spread across logged devices",
    "change in total steady board power",
    "change in lowest steady utilization"
  ],
  "limitations": [
    "Both files are read in the browser and are not uploaded.",
    "No difference is shown when any comparison gate fails.",
    "A negative temperature-rise change means Run B was lower relative to the entered ambient during these two owner runs. It does not prove the cooling setup caused the difference.",
    "The basic NVIDIA log does not capture every hotspot, memory temperature, event, or physical fault.",
    "PCI bus ID identifies a device in the system, not its physical cooling position.",
    "Only matched shop-controlled runs may advance the Quarkpad thermal proof status."
  ],
  "sources": [
    "https://docs.nvidia.com/deploy/nvidia-smi/index.html",
    "https://www.reddit.com/r/LocalLLaMA/comments/1uvcjd0/i_benchmarked_15_ewaste_gpus_with_modern_workloads/",
    "https://www.reddit.com/r/LocalLLaMA/comments/1qhg2jp/3090_saga_repaste_sli_usage_drivers_practical/"
  ]
}