Undisclosed · Kempas, Johor, Malaysia

DayOne Kempas

590MW

The power of 480,000 US homes.

Drawing power since Jan 2026.

Capital cost
$16.0B
Chips
B300
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Power over time

facility power · 7 milestones
Every milestone
  1. 11 Nov 2023 — Land clearing begins.
  2. 15 Sep 2025 — In this video at 6:28, some fans can be seen in motion for Building 3. However, we think it's unlikely that any buildings are at fully operational capacity yet. Buildings 1-4 are roofed. Building 5-6 shells are underway.
  3. 22 Jan 2026 112 MW Buildings 3 and 4 are operational. This is based on construction looking complete, and DayOne reporting 390 MW "in service" across both Nusajaya and Kempas campuses as of Jan 30. Subtracting our Nusajaya estimates (69.5 MW excluded in Phase 1 + 240.3 MW AI) implies ~80 MW in service at KTP, consistent with roughly 2 buildings per our ~49.6 MW per-building estimate, but not at full capacity. Buildings 1 and 2 look complete with rooftop cooling equipment installed (32 units each, in 2 strips of 16). The units are almost all single-fan cells; Building 2 has one strip of 16 single-fan cells and one darker bank of 16 long multi-fan air-cooled (slat) units - this suggests an cell-to-air-cooled power equivalence that informs our power estimates. The smaller Building 9 (west of Building 1, half fit-out: 16 cells) also has its cooling installed. Building 5 has rooftop equipment partially installed; Building 6 is roofed; Buildings 7-8 shells are still underway.
  4. 1 Jun 2026 313 MW Buildings 1-4 and the smaller Building 9 assumed fully operational: cooling equipment was installed by Jan 2026 (Building 9 on the same timeline as Building 1) and the implied KTP in-service figure (~80 MW) shows them ramping in early 2026, so we allow ~3 more months to reach full capacity. Rooftop equipment texture is visible campus-wide.
  5. 10 Aug 2026 313 MW Buildings 5-6 look complete and parking lot activity suggests they are nearly operational. Building 7-8 nearing completion with some construction equipment still in their vicinity.
  6. 1 Sep 2026 452 MW Buildings 5-6 assumed operational. These buildings were roofed between Sep and Dec 2025 and equipment fit-out was underway in Jan 2026; applying the default roof-to-operational delay plus ramp time approximates their operability to this date.
  7. 1 Oct 2026 590 MW Buildings 7-8 assumed operational. These buildings were roofed by March 2026 and by August 2026 their cooling and backup power equipment looked complete. With an additional two months of commissioning after August we approximate their operability to this date.

Coal made 43% of the power in Malaysia

share of generation · Jun 2025 to May 2026

Malaysia World

  1. Gas 34%
  2. Coal 43%
  3. Other fossil 1%
  4. Nuclear 0%
  5. Wind 0%
  6. Solar 2%
  7. Hydro 17%
  8. Bio & other 3%

Fossil 78% (+1 pt on a year earlier) · nuclear 0% · renewables 22% · 637 g CO2e per kWh, life cycle · Jun 2025 to May 2026. Generation for all of Malaysia, without imports; the data does not show which grid feeds the site. Every country behind an AI site.

Sources

selected by Epoch AI
  1. News of Phase 2 operation
  2. Archived DayOne website - "120 MW in operation" in Johor
  3. Archived DayOne website - 390 MW "in service" in Johor
  4. Financial Times report that Alibaba and ByteDance are training AI models in southeast Asia

Data: Epoch AI, “AI data centers”, CC BY 4.0, retrieved 22 Oct 2026. Facility power adds cooling and other overhead to the IT power the servers draw. Placed at the centre of Kempas. Grid: Ember, “Monthly Electricity Data and Yearly Electricity Data”, CC BY 4.0, retrieved 11 Oct 2026; shares computed here. All sources.