{
  "meta": {
    "key": "specpower_efficiency",
    "title": "Server Work per Watt",
    "unit": "overall ssj_ops/watt",
    "category": "Computing",
    "source": "SPECpower_ssj®2008 results",
    "sourceUrl": "https://www.spec.org/cgi-bin/osgresults?conf=power_ssj2008&op=fetch&format=csvdump&proj-BMKVERS=256&critop-BMKVERS=0&crit-BMKVERS=1.2&proj-NODES=256&critop-NODES=0&crit-NODES=1&proj-DESIGNATION=256&critop-DESIGNATION=0&crit-DESIGNATION=Server&proj-PROVISION=256",
    "verified": "2026-10-20",
    "url": "https://exponentialtracker.com/curve/specpower_efficiency",
    "csv": "https://exponentialtracker.com/data/specpower_efficiency.csv",
    "json": "https://exponentialtracker.com/data/specpower_efficiency.json",
    "retrievedFrom": "Compiled by Exponential Tracker and re-derived from the source named above. Rebuilt on every deploy, so re-fetch rather than trusting a saved copy to be current.",
    "rights": "The underlying data belongs to SPECpower_ssj®2008 results. This compilation may be reused with attribution to Exponential Tracker. No licence is claimed or implied over the source data.",
    "citation": "Exponential Tracker, \"Server Work per Watt\", exponentialtracker.com/curve/specpower_efficiency, data verified 2026-10-20. Underlying source: SPECpower_ssj®2008 results."
  },
  "data": [
    {
      "year": 2009,
      "value": 2098,
      "label": "IBM x3250 M3 (Intel Xeon X3470)"
    },
    {
      "year": 2010,
      "value": 3052
    },
    {
      "year": 2011,
      "value": 4697
    },
    {
      "year": 2012,
      "value": 6109
    },
    {
      "year": 2013,
      "value": 7336
    },
    {
      "year": 2014,
      "value": 10654,
      "label": "Fujitsu RX2540 M1: stall begins"
    },
    {
      "year": 2015,
      "value": 10700
    },
    {
      "year": 2016,
      "value": 12212
    },
    {
      "year": 2017,
      "value": 13398
    },
    {
      "year": 2018,
      "value": 13478,
      "label": "Huawei 2288H V5: last Intel lead"
    },
    {
      "year": 2019,
      "value": 20176,
      "label": "Lenovo SR655: first AMD EPYC lead"
    },
    {
      "year": 2020,
      "value": 23428
    },
    {
      "year": 2021,
      "value": 23505
    },
    {
      "year": 2022,
      "value": 30602
    },
    {
      "year": 2023,
      "value": 34597
    },
    {
      "year": 2024,
      "value": 42312,
      "label": "Lenovo SR665 V3 (EPYC 9845)"
    },
    {
      "year": 2025,
      "value": 44168
    },
    {
      "year": 2026,
      "value": 44648,
      "label": "Best published so far this year"
    }
  ]
}