“Worldwide data center electricity consumption will grow 26% in 2026, reaching 565 terawatt hours, up from 447TWh in 2025; AI-optimized servers will account for 31% of data center power consumption in 2026 and their power consumption will surpass that of conventional servers in 2027.”

Gartner also forecast worldwide data center power demand rising 27% in 2026 to roughly 132GW and reaching about 290GW by 2030; full-year 2026 consumption data is not yet available.