PUN 4 at Hinjewadi is listed by Nxtra by Airtel at 24 MW of IT power across 2,500 racks — 9.6 kW a rack, PUE below 1.55. One building holding nearly half of the operator’s 49.5 MW in Pune. It is also the anomaly in the cluster: the three buildings around it average under 4.3 kW a cabinet and this one is built for nearly ten. That gap is the clearest evidence in this registry of a colocation operator changing specification on the same site.
1At a glance
2Two tiers in one park
A cluster is only as useful as the differences inside it. Pune has four buildings and two specifications.
| Building | Racks | kW a rack | What it can host |
|---|---|---|---|
| PUN 4 | 2,500 | 9.6 | contained air for general compute, and rear-door or direct-to-chip cooling at the top end |
| PUN 2 | 4,000 | 4.25 | general enterprise workloads, no accelerated compute |
| PUN 3 | 1,000 | 4.0 | general enterprise workloads |
| PUN 1 | 1,250 | 3.6 | general enterprise workloads, legacy layouts |
9.6 kW a cabinet does not make a building AI-ready by itself — the operator’s Mahape halls run at 11.5, its newest Chennai hall at 5.0, and its published ceiling for liquid-cooled racks is 130 kW. But 9.6 is more than twice 4.25, and that difference decides which Pune building a customer with a rack full of accelerators calls first.
The arithmetic that matters for the estate: 24 MW on 2,500 racks is 48% of Pune’s power on 29% of its cabinets. Power, not floor space, is the scarce input in Indian colocation, and this building consumes it at the rate a modern tenant needs.
Not total megawatts. Kilowatts per rack, in the hall they will actually be in.
On this one site the answer ranges from 3.6 to 9.6 — a 2.7× spread inside a single industrial park.
3Where the cluster ends
Four cards total 49.5 MW across 8,750 racks. That is the Pune cluster as it exists, and it is what this registry counts. What a reader will also find, in the same searches, is a campus that would change the number entirely.
| Item | MW | Racks | Status |
|---|---|---|---|
| PUN 4 — this building | 24 | 2,500 | listed |
| PUN 2, PUN 3, PUN 1 | 25.5 | 6,250 | listed |
| Pune cluster counted here | 49.5 | 8,750 | operator cards |
| “Pune III” as disclosed in 2021 | 110 | 12,500 | development, no construction evidence |
| “Pune III” as a directory lists it now | 40 | not stated | planned for late 2026 |
If the 110 MW campus is real, Pune reaches about 160 MW and becomes Nxtra’s largest cluster by a wide margin. If the 40 MW version is the live plan, the city roughly doubles. If neither is built, Pune stays at fifty megawatts. Three outcomes, one name, and no public document choosing between them.
Gridvik keeps 49.5 MW in the count and treats both larger figures as announcements. This is the discipline the whole registry runs on: a number enters the total when a named operator puts it on a facility page or in a filing, and not before.
4Pune against the market
| Measure | Value | Note |
|---|---|---|
| This operator’s Pune cards | 49.5 MW | four buildings, one company |
| A widely cited market estimate for Pune | 32 MW, about 5% national share | smaller than one operator’s cards — the estimate is stale, or counts live load only |
| Other operators in the city | a new entrant toward 60 MW, a hyperscaler on 16.4 acres, two incumbents | land and announcements, not live capacity |
| Pune’s share of Nxtra’s national headline | about 17% of 300 MW | second largest cluster after Mumbai |
The second row is the one to hold onto. A commonly cited figure puts the whole of Pune at 32 MW. One operator’s four buildings in that city already total 49.5 MW. Either the market estimate counts only live load while the cards count designed capacity — likely, and a distinction worth money — or the estimate is years old.
Both readings point at the same product: a registry that separates designed from live at the facility level. Every published India market number blurs the two, and the blur is where the pricing errors live.
5Timeline
- A memorandum with Maharashtra’s industrial development corporation covers new campuses in Mumbai and Pune
- A $673 million programme describes Pune as an existing facility and a separate 110 MW campus in development
- The operator lists PUN 4 at 24 MW across 2,500 racks with a declared PUE below 1.55
- Airtel raises $1 billion for Nxtra at about $3.1 billion, targeting 1 GW from roughly 300 MW
- No commissioning date or current load for PUN 4, and no public evidence either way on the 110 MW campus
6Procurement
7Limits and open questions
8Sources
Sources: Nxtra Pune data centre page, Nxtra by Airtel site, Data Center Dynamics Infra on the Nxtra expansion programme, DataCenterMap Pune listings, Baxtel Pune listings, ocolo Pune listings, publicly available India data centre market summaries, Airtel releases.