Microsoft Dublin DB3
Microsoft Azure · Grange Castle
- IT live
- 90 MW
- Remaining
- 30 MW
- $ / kW·mo
- $147
- White space
- 511k ft²
Inventory
75% occupiedPower
120 MWcampus
30 MW to commission · 90 MW in use
White space
682k ft²total
170k ft² free · 511k ft² occupied
63k m² · 16k m² free
Remaining power is campus IT not yet commissioned — captive capacity, not third-party colo.
Power
About 30 MW of the utility feed is cooling, conversion, and house load.
Power cost
$147/kW·mo
17.4¢ industrial · 20.2¢ after PUE 1.16
- Per MW·year
- $1.8M
- This site · 90 MW
- $159M/yr
- 12 kW rack
- $1,768/mo
5.4× the cheapest market (Iceland Landsvirkjun). Same IT load there is $130M/yr less.
Ireland industrial · utility tariff × PUE, not colo list price.
- Redundancy
- N+1
- Opened
- 2009
- Renewable match
- 80%
- Rack density
- 12 kW
- PUE
- 1.161.00 ideal · 1.60 typical
- Power source
- EirGrid plus PPAs.
Cooling
Plant
Free air
Liquid
Not deployed
Rack density
12 kW
H100-eq
—
WUE
0.27 L/kWh
fleet avg · 2025 · 213k m³/yr at 90 MW
Operator fleet average applied to this hall — not a site meter. Microsoft FY2025 water intensity disclosure.
Air economization at Grange Castle. Newer Irish AI halls are liquid-ready; this building is free-air.
Network carriers
6On-net and metro carriers typically present at this location, including internet exchanges. Not a full circuit inventory.
Clouds
1Native regions and typical Direct Connect / ExpressRoute / Interconnect on-ramps at this campus. Availability varies by hall.
Location
Dublin, Leinster, Ireland
Grange Castle Business Park, Dublin
53.305°, -6.448° · Europe
Tenants / users
Azure, OpenAI inference (partial)
Notes
Microsoft's long-running Dublin campus. Irish grid constraints cap further expansion.
Compiled from public filings, operator pages, and reporting. Not an official operator specification.