Server statistics span more than shipments or processor counts. They include the electricity used by servers and supporting data-center systems, the rise of AI infrastructure, rack density, outage experience, downtime costs and the market’s changing value.
The figures below distinguish observed estimates, surveys and scenario forecasts, while keeping geography and measurement periods explicit.
Key Server Statistics
The most broadly useful server statistics include:
- 415 TWh of electricity was consumed by global data centres in 2024, according to the IEA estimate.
- Data centres represented about 1.5% of global electricity consumption in 2024, using the IEA’s global estimate.
- The United States accounted for 45% of global data-center electricity use in 2024, compared with 25% for China and 15% for Europe.
- Global data-center electricity consumption grew about 12% annually from 2017 to 2024, an average rate across the period.
- Global data-center electricity demand is forecast at about 945 TWh in 2030, in the IEA Base Case.
- Accelerated-server electricity consumption is forecast to grow 30% annually through 2030, while conventional-server electricity is forecast to grow 9% annually globally.
- U.S. data-center electricity use rose from 58 TWh in 2014 to 176 TWh in 2023, based on DOE/LBNL modeled estimates.
- U.S. data centres used about 4.4% of national electricity in 2023, including servers, storage, networking and infrastructure.
- U.S. data-center electricity use is forecast at 325–580 TWh in 2028, reflecting scenario uncertainty.
- U.S. average national PUE improved from 1.55 in 2018 to 1.45 in 2024, where PUE compares total facility energy with IT-equipment energy.
- The average typical rack density was 8 kW in the 2024 Uptime survey, or 7.1 kW after excluding 11 high-density outlier sites.
- Twenty-one percent of surveyed operators reported a highest rack density of 20 kW or more in 2024, a derived sum of rounded categories.
- Fifty-three percent of Uptime survey operators reported an outage during the prior three years in 2024, down from 78% in 2020.
- Power caused 54% of primary impactful-outage causes in the 2024 Uptime survey, ahead of cooling, network and IT failures.
- Fifty-four percent of respondents said their most recent significant outage cost more than $100,000 in 2024, including direct, opportunity and reputation costs.
- Global server shipments declined 19.4% to 12 million units in 2023, according to IDC.
- The global server market grew 10.5% to $136 billion in 2023, while average selling price rose 37.1% to $11,376.
- AI servers represented approximately 23% of the global server market in 2023, and IDC forecasts AI-server revenue of $49.1 billion by 2027.
Contents
- Key Server Statistics
- Global Server and Data-Center Energy Statistics
- AI Server Energy Trends and Growth
- U.S. Server and Data-Center Electricity Data
- Server Rack Density and Efficiency Measurements
- Server Outages, Reliability and Downtime Costs
- Server Market Scale and Regional Trends
Global Server and Data-Center Energy Statistics
Data-center electricity is broader than server-only electricity: it includes servers alongside storage, networking, cooling and other infrastructure. The IEA estimates that global data centres consumed about 415 TWh in 2024, equal to about 1.5% of global electricity consumption.
Regional concentration was substantial in the same year:
- The United States accounted for 45% of global data-center electricity use.
- China accounted for 25%.
- Europe accounted for 15%.
The IEA estimates that global data-center electricity consumption grew about 12% per year from 2017 to 2024. Its Base Case projects about 945 TWh in 2030, just under 3% of global electricity consumption, and about 1,200 TWh in 2035.
Source: Energy and AI – Executive summary. These are IEA estimates and forecasts for data centres, not a server-only census.
| Measure | Period | Result | Scope |
|---|---|---|---|
| Data-center electricity | 2024 | 415 TWh | Global estimate |
| Share of global electricity | 2024 | 1.5% | Global estimate |
| Data-center electricity | 2030 | 945 TWh | IEA Base Case forecast |
| Data-center electricity | 2035 | 1,200 TWh | IEA Base Case forecast |
AI Server Energy Trends and Growth
The IEA separates accelerated servers, which are mainly AI-driven, from conventional servers. In its 2024–2030 Base Case, accelerated-server electricity consumption is projected to grow 30% annually, compared with 9% annually for conventional servers.
The projected net increase in global data-center electricity has several components. Conventional servers account for around 20%, other IT equipment for around 10%, and cooling and other infrastructure for around 20%; these categories are not interchangeable with server-only demand.
The United States and China dominate the IEA’s regional growth outlook. From 2024 to 2030, U.S. data-center electricity demand is projected to increase by about 240 TWh, while China’s is projected to increase by about 175 TWh; together, the two countries account for nearly 80% of projected global data-center electricity growth.
Source: Energy demand from AI – Energy and AI – Analysis. The values are IEA Base Case forecasts, so actual AI adoption and efficiency may differ.
The DOE/LBNL Reference Case offers a U.S.-specific view of AI’s changing role. AI servers are forecast to account for 84% of total U.S. server energy in 2030, and 55% of total U.S. data-center energy when facility energy is included; alternative scenarios put AI servers at 53% in Consolidated Deployment and 59% in High Inference Energy.
Source: United States Data Center Energy Usage Report: 2025 Update. These are scenario results, not current observed shares.
U.S. Server and Data-Center Electricity Data
DOE/LBNL modeled estimates show U.S. data-center electricity use increasing from 58 TWh in 2014 to 176 TWh in 2023. Data centres represented about 4.4% of total U.S. electricity in 2023, but that measure includes servers, storage, networking and facility infrastructure.
The near-term outlook is wide because it depends on deployment and demand assumptions:
- U.S. data-center electricity use is projected at 325–580 TWh in 2028.
- Data centres are projected to represent 6.7%–12% of national electricity use in 2028.
- The Reference Case projects energy consumption increases of 22% from 2024 to 2025 and 29% from 2025 to 2026.
- Beyond the near term, the LBNL Reference Case assumes a 21% compound annual growth rate for U.S. data-center energy.
Source: DOE Releases New Report Evaluating Increase in Electricity Demand from Data Centers and United States Data Center Energy Usage Report: 2025 Update. Forecast ranges are not observed outcomes.
Infrastructure’s share of the U.S. total was estimated at 36% in 2018 and 31% in 2024. The decline concerns the broader infrastructure category, not server power alone.
Server Rack Density and Efficiency Measurements
Rack density shows how much IT power is concentrated in a rack, while PUE measures facility overhead: total facility energy divided by IT-equipment energy. The two measures answer different questions.
The 2024 Uptime survey reported an average typical rack density of 8 kW. Because 11 sites reported maximum densities above 50 kW, the average typical density was 7.1 kW when those high-density outliers were excluded.
| 2024 Uptime survey measure | Result | Definition or caveat |
|---|---|---|
| Average typical rack density | 8 kW per rack | Survey average |
| Typical density excluding 11 outliers | 7.1 kW per rack | Excludes high-density sites |
| Operators upgrading halls for high-performance IT | 29% | Self-reported |
| Highest density below 10 kW | 41% | n=721 for density question |
| Highest density 10–14 kW | 34% | Rounded survey figure |
| Highest density 15–19 kW | 23% | Rounded survey figure |
| Highest density 20 kW or more | 21% | Derived from rounded categories |
Source: Uptime Institute Global Data Center Survey 2024. The survey is not a census of all facilities, and the 21% figure is a derived sum of displayed rounded categories.
U.S. average national PUE improved from 1.55 in 2018 to 1.45 in 2024, with the DOE/LBNL Reference Case projecting 1.36 in 2030. Networking equipment nevertheless rose from 3.4% of U.S. data-center electricity in 2018 to 4.5% in 2024, and networking is not server electricity.
Server Outages, Reliability and Downtime Costs
Uptime’s 2024 survey found that 53% of operators reported an outage during the prior three years. The comparable share was 78% in 2020, 69% in 2021 and 60% in 2022, although changing samples mean these cross-year survey results are not a census trend.
Among operators with an impactful outage, 9% classified their most impactful event as serious or severe. The detailed distribution was 38% negligible, 38% minimal, 15% significant, 6% serious and 3% severe; the impact scale excludes “don’t know” responses.
Power was the primary cause of 54% of impactful outages, followed by cooling at 13%, network failures at 12% and IT hardware or software failures at 11%. These percentages describe primary causes in the survey, not every contributing factor.
Cost exposure was also uneven. In the survey’s cost question, which used n=91 and included direct, opportunity and reputation costs, 54% said their most recent significant outage cost more than $100,000, 20% said more than $1 million and 46% said under $100,000.
Source: Uptime Institute Global Data Center Survey 2024. Results are self-reported, rounded survey percentages.
Server Market Scale and Regional Trends
IDC’s 2023 market estimates show a split between unit volume and financial value. Global server shipments declined 19.4% to 12 million units, while the global server market grew 10.5% to $136 billion and average selling price rose 37.1% to $11,376.
| Global server market measure | 2023 result | Measurement basis |
|---|---|---|
| Shipments | 12 million units | IDC estimate; down 19.4% year over year |
| Average selling price | $11,376 | IDC estimate; up 37.1% |
| Market revenue | $136 billion | IDC vendor-revenue estimate; up 10.5% |
| AI-server share | Approximately 23% | IDC segment estimate; basis not specified in excerpt |
| AI-server revenue | $49.1 billion by 2027 | IDC forecast |
Source: An Investor’s Guide to AI Everywhere. IDC’s shipment, revenue, average-price and AI-server-share figures may use different market bases, so they should not be combined as though they measured the same population.
The market figures complement, rather than replace, energy statistics. A server shipment counts units entering the market, while electricity measures operating demand and market revenue measures vendor value; each captures a different part of server scale.
The broader regional energy outlook remains concentrated: the IEA projects about 240 TWh of additional U.S. data-center demand and 175 TWh of additional Chinese demand by 2030 from 2024 levels. Those figures concern data centres rather than server-only electricity and are Base Case forecasts.