NTT Bengaluru 2 in Electronic City carries 4.5 MW of critical IT load inside 7.5 MW of total facility load. Both figures are published by the operator, which means the ratio can be computed rather than assumed: 1.67. That is the only NTT building in this registry whose published halves sit above the operator’s own 1.5 house standard. NAV1A is 1.50, Mumbai 7 is 1.48, Bengaluru 4 is 1.49. This one is 1.67, and the reason is arithmetic rather than engineering: at 4.5 MW the fixed plant does not scale down. It is also one of only two additive NTT records in Karnataka. Together with Bengaluru 3 they are 16.5 MW, against a state this registry counts at 90.7 MW.
1At a glance
2The only 1.67 in the estate
NTT builds to 1.5. This building does not, and the reason is the most useful thing about it.
| Building | IT load | Facility load | Ratio |
|---|---|---|---|
| Bengaluru 2 | 4.5 MW | 7.5 MW | 1.67 |
| Bengaluru 3 | 12 MW | 20 MVA | 1.67 naive, 1.50 at 0.9 pf |
| NAV1A, Mahape | 30 MW | 45 MW | 1.50 |
| Bengaluru 4 | 67.2 MW | 100 MW | 1.49 |
| Mumbai 7 | 25.6 MW | 38 MW | 1.48 |
Four of the five land between 1.48 and 1.50. That is not a published policy; it is a design standard visible only because the operator publishes both numbers. Bengaluru 2 is 11% above it.
The plant behind 4.5 MW of rentable load is 3 MW. Behind 67.2 MW at Bengaluru 4 it is 32.8 MW — proportionally half as much. Nothing is wrong with either building. One is simply too small to amortise its own chillers.
There is a size below which overhead cannot be reduced, because chillers, pumps, switchgear and battery rooms are bought in units, not in proportion.
In this registry that floor sits somewhere between 4.5 MW at 1.67 and 12 MW at 1.50. Bengaluru 2 and Bengaluru 3 bracket it.
3Why small halls cost more per megawatt
The ratio converts into rupees, and the rupees are the reason a 4.5 MW hall can never be sold on price.
| Ratio | Facility load per MW IT | Annual energy | Annual cost |
|---|---|---|---|
| 1.49 — Bengaluru 4 | 1.49 MW | 10,442 MWh | Rs 8.4 crore |
| 1.67 — Bengaluru 2 | 1.67 MW | 11,703 MWh | Rs 9.4 crore |
| Difference | 0.18 MW | 1,261 MWh | +Rs 1.0 crore per MW per year |
At the registry’s standard Rs 8 per kWh and 80% loading, the 0.18 difference in ratio costs about Rs 1 crore a year for every megawatt of rentable IT. On this building’s 4.5 MW that is Rs 4.5 crore a year of extra electricity against what the same capacity would cost at Bengaluru 4’s ratio.
Small halls survive on location, latency and the willingness of a customer to pay for a smaller commitment. They do not survive on price per megawatt, and NTT’s own numbers say so.
4Bengaluru's two disclosure models
Karnataka is the one state in this registry where two of the largest operators can be compared on the same terms — and the comparison is unusually clean on both sides.
| Measure | STT GDC Bengaluru | NTT Bengaluru |
|---|---|---|
| Published city capacity | 23 MW | 67.2 MW planned campus |
| Records in this registry | 5 | 4 |
| Basis stated | unlabelled headline | critical IT load, every record |
| Reconciliation | 23 published against 22.6 in cards | no city aggregate to reconcile |
| Additive capacity | 0 MW | 16.5 MW |
| Newest building | Bengaluru 3 | Bengaluru 4A, live June 2026 |
STT Bengaluru was the cleanest reconciliation in the first half of this registry: 23 MW published, 22.6 MW in the underlying buildings, a difference of 0.4 MW that is rounding rather than error. That remains the standard every other portfolio is measured against.
But the four tenths of a megawatt reconcile to zero counted megawatts, because every STT Bengaluru building sits inside a portfolio aggregate. NTT publishes 16.5 MW in the same city and counts all of it, because its buildings stand alone.
Two operators, one city, and the better reconciliation is the one that contributes nothing to the total. That is the paradox at the centre of this registry, and Karnataka is where it is sharpest.
5Procurement
6Limits and open questions
- 4.5 MW is critical IT load and 7.5 MW is facility load. They must never be added together or compared with a facility-load figure from another building.
- The 1.67 ratio is the highest in NTT’s Indian estate but it is computed from two published figures of unknown vintage. If either has been updated without the other, the ratio is stale.
- No rack count, floor area, PUE or occupancy.
- The Bengaluru market comparison is not like for like: STT’s 23 MW is a city headline, NTT’s 16.5 MW is two buildings.
- The Rs 8 per kWh tariff and 80% loading are registry assumptions, not contract rates.
- What would close it. A rack count and a floor area would make this the most comparable small hall in India.
7Sources
Sources: NTT Global Data Centers Bengaluru 2 facility page, NTT DATA global data center locations index, Data Center Dynamics reporting on the Bengaluru portfolio, Datacentermap listing for GDC Bengaluru 2, and Datacenters.com facility listing.
