NAVER Gak Sejong Data Center: NAVER AI Specs
Status: Active Operation / Phased Expansion | Location: 824 Haengbok-daero, Jipyeon-dong, Sejong Special Self-Governing City 30141, South Korea
Project Overview
NAVER Gak Sejong is a 270 MW flagship hyperscale artificial intelligence data center developed by NAVER Corporation in Sejong, South Korea, representing a major investment in the country’s next-generation digital infrastructure. Spanning approximately 294,000 m², the campus is designed to support the rapidly expanding computational requirements of artificial intelligence, cloud computing, and high-performance computing workloads. The facility is purpose-built to support NAVER’s HyperCLOVA X generative AI models, enabling large-scale model training, inference, and other advanced AI applications that require substantial computing capacity and specialized infrastructure. In addition to AI workloads, the campus supports NAVER’s broader cloud operations and high-performance supercomputing requirements, creating an integrated environment capable of handling diverse enterprise and digital services. A major component of the development is its extensive storage infrastructure, with a reported capacity of approximately 65 exabytes, enabling the facility to manage enormous volumes of data generated by AI models, cloud applications, and digital platforms. The campus’s large physical footprint and high power capacity allow NAVER to deploy dense computing systems at significant scale while maintaining room for operational flexibility and future growth. Its development in Sejong further strengthens the city’s position as an emerging hub for advanced technology and digital infrastructure in South Korea. By combining hyperscale computing capacity, massive storage infrastructure, AI-optimized systems, and cloud capabilities, NAVER Gak Sejong demonstrates the evolution of data centers from conventional server facilities into sophisticated AI infrastructure platforms. The project is expected to play an important role in supporting NAVER’s generative AI ecosystem and its growing portfolio of cloud, search, and digital services.
Quick Facts
| Field | Value |
|---|
| Project Name | NAVER Gak Sejong Data Center: NAVER AI Specs |
| Location | 824 Haengbok-daero, Jipyeon-dong, Sejong Special Self-Governing City 30141, South Korea |
| Status | Active Operation / Phased Expansion |
| Commissioning | November 2023 Phase 1 Delivery (Multi-Phase Buildout) |
| Total IT Load | ~200.0 MW Planned Total Critical IT Load |
| Total Capacity | 294,000 m² (3.16M sq ft) total campus area accommodating up to 600,000 server units |
| Tier Level | Tier III / Tier IV Equivalent Fault-Tolerant Hyperscale AI Architecture |
| Project Type | Purpose-Built Sovereign AI Supercomputing Cloud, Hyperscale Data Center & Storage Megacampus |
City Profile
| Header | Details |
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| City Name | Sejong-si |
| Population | ~410,000 (2025 estimate) |
| Urban Agglomeration | ~430,000 |
| City GDP | ~USD 18 billion (estimated) |
| Per Capita Income | ~USD 43,000–45,000 |
| City Tier | Tier 2 (South Korea) |
| Key Strengths | Administrative capital of South Korea; concentration of government ministries and public institutions; planned smart city development; modern infrastructure; high quality of life; strong public-sector employment; innovation and sustainability initiatives |
Companies Involved
| Header | Details |
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| Developer / Operator | NAVER Corporation |
| Strategic Infrastructure Partner | Hyundai E&C (General Construction), Sejong Special Self-Governing City, KEPCO |
| Construction Contractor | Hyundai E&C (Hyundai Engineering & Construction) |
| MEP Engineering | NAVER Data Center Design Team & Specialized Critical Engineering Partners |
| Network Connectivity | Carrier-neutral facility featuring path-diverse subterranean fiber vaults, dedicated Meet-Me-Rooms (MMRs), and high-capacity dark fiber links connecting directly to NAVER's Gak Chuncheon data center and Seoul connectivity hubs. |
| Power Infrastructure | Direct 154 kV high-voltage dual transmission grid tie-in from KEPCO substations, backed by static 2N / N+1 UPS systems and on-site emergency backup generators. |
Technical Specifications
| Header | Details |
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| Power Capacity | ~270 MVA Dedicated Substation Grid Capacity |
| UPS Redundancy | Concurrently Maintainable Tier III 2N / N+1 Static UPS Systems |
| Cooling System | NAMU III (NAVER Air Membrane Unit) indirect free cooling, direct air/liquid hybrid cooling systems, and cold-air containment utilizing natural winds from the Geum River. |
| Connectivity | Sub-millisecond optical dark fiber interconnects establishing high-speed trunk lines across South Korea's national digital backbone. |
| PUE Target | < 1.12 Annualized Operational Design PUE |
| Energy Mix | High-efficiency KEPCO grid power supplemented by on-site solar PV installations, waste-heat reuse systems, and green power procurement. |
Milestones
| Header | Details |
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| Announcement | October 2019 |
| Construction Start | April 2021 |
| Phase 1 Go-Live | November 2023 |
| Full Buildout | Multi-Phase Expansion Delivery Through 2028+ |
Investment Details
| Header | Details |
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| Total Investment | ~₩700,000,000,000 KRW (~$520,000,000 USD Phase 1 Initial Investment; Masterplan Capital Expenditure higher) |
| Funding | Corporate Capital Expenditure (NAVER Corporation) |