Question 1

What is an AI datacenter?

Accepted Answer

An AI datacenter is a facility purpose-built or retrofitted for GPU and accelerator workloads — typically at rack densities above 30 kW, with liquid-cooling readiness and high-bandwidth fabric (InfiniBand NDR, NVLink, or Spectrum-X). At least 40% of IT load runs AI training or inference on GPUs such as NVIDIA H100, H200, B200, or GB200 NVL72.

Question 2

Which datacenter has the most GPUs?

Accepted Answer

As of 2026, xAI Colossus in Memphis, Tennessee holds the title of the world's largest single-site GPU deployment, with more than 200,000 NVIDIA H100 and H200 GPUs in one InfiniBand domain. Meta Hyperion (Louisiana) and OpenAI Stargate Abilene (Texas) are scaling toward gigawatt-class deployments that will overtake it within the next 18 months.

Question 3

What is the largest AI cluster?

Accepted Answer

xAI Colossus is the largest contiguous AI training cluster in 2026, exceeding 200,000 NVIDIA H100/H200 GPUs on a single InfiniBand NDR 400G fabric. Meta's Hyperion build and OpenAI's Stargate program are constructing multi-site fabrics that will exceed one million accelerators across coupled campuses by 2027.

Question 4

Which GPU cloud is cheapest for H100?

Accepted Answer

On-demand: Together AI ($1.75/hr) and Voltage Park ($1.89/hr) lead. Reserved 1-year: Voltage Park ($1.20/hr) and Crusoe ($1.39/hr) are typically lowest. AWS p5 sits at the top of the price stack at ~$4.10/hr on-demand.

Question 5

How is Datacenter.computer different from a datacenter directory?

Accepted Answer

Datacenter.computer is an agent-readable intelligence layer, not a directory. It normalizes pricing, capacity, power, fabric, and latency across 240+ facilities and 40+ operators into a single queryable graph for AI agents, traders, and procurement teams.

Facility	Operator	Location	GPU	MW	PUE
Global Switch BUCHAREST1 South	Global Switch	Bucharest, Romania	B200	15	1.28
Data4 BUCHAREST2 Annex	Data4	Bucharest, Romania	—	7	1.48
OVHcloud BUCHAREST3 West	OVHcloud	Bucharest, Romania	H200	9	1.49
Hetzner BUCHAREST4 Park	Hetzner	Bucharest, Romania	—	17	1.31
Global Switch BUCHAREST5 South	Global Switch	Bucharest, Romania	—	19	1.36
Hetzner BUCHAREST6 East	Hetzner	Bucharest, Romania	H200	11	1.54
Global Switch BUCHAREST7	Global Switch	Bucharest, Romania	A100	11	1.52
Telefonica BUCHAREST8 Annex	Telefonica	Bucharest, Romania	—	19	1.31
Global Switch BUCHAREST9 Central	Global Switch	Bucharest, Romania	—	9	1.49
Hetzner BUCHAREST10 Annex	Hetzner	Bucharest, Romania	L40S	8	1.47
atNorth BUCHAREST11 Park	atNorth	Bucharest, Romania	—	4	1.40
atNorth BUCHAREST12 Annex	atNorth	Bucharest, Romania	—	9	1.51
Telehouse BUCHAREST13 East	Telehouse	Bucharest, Romania	—	10	1.55
Scaleway BUCHAREST14 Park	Scaleway	Bucharest, Romania	A100	15	1.23
atNorth BUCHAREST15 Campus	atNorth	Bucharest, Romania	H100	11	1.52
Itconic BUCHAREST16 Campus	Itconic	Bucharest, Romania	—	20	1.47

AI Datacenters in

Company → Datacenter → GPU → Customer → Industry