What is an AI datacenter?

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.

Which datacenter has the most GPUs?

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.

What is the largest AI cluster?

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.

Which GPU cloud is cheapest for H100?

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.

How is Datacenter.computer different from a datacenter directory?

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.

[DC.COMPUTER] Layer 5 · Colocation

IONOS

Every indexed IONOS datacenter — facility-level capacity, GPU fleet, and country coverage.

Datacenter Portfolio

[AI Summary]

IONOS runs 46 indexed datacenters across 16 countries, totaling 768 MW of IT capacity. The portfolio spans colocation tiers and deploys MI300X, H100, B200, H200, A100, L40S.

Facilities

768 MW

Total IT

Countries

GPU SKUs

[Facilities · 46]

Facility	Operator	Location	GPU	MW	PUE
IONOS LONDON21 South	IONOS	London, United Kingdom	—	20	1.52
IONOS LONDON22 Annex	IONOS	London, United Kingdom	—	44	1.32
IONOS LONDON95 Campus	IONOS	London, United Kingdom	—	35	1.25
IONOS LONDON98 East	IONOS	London, United Kingdom	—	37	1.21
IONOS FRANKFURT12	IONOS	Frankfurt, Germany	MI300X	10	1.43
IONOS FRANKFURT18	IONOS	Frankfurt, Germany	—	39	1.29
IONOS FRANKFURT20 South	IONOS	Frankfurt, Germany	H100	7	1.42
IONOS FRANKFURT82	IONOS	Frankfurt, Germany	—	46	1.39
IONOS FRANKFURT84 Campus	IONOS	Frankfurt, Germany	—	17	1.46
IONOS AMSTERDAM16 Campus	IONOS	Amsterdam, Netherlands	—	16	1.52
IONOS AMSTERDAM29 East	IONOS	Amsterdam, Netherlands	—	19	1.52
IONOS AMSTERDAM30 West	IONOS	Amsterdam, Netherlands	—	39	1.32
IONOS PARIS21 Park	IONOS	Paris, France	MI300X	4	1.39
IONOS PARIS22 East	IONOS	Paris, France	—	20	1.52
IONOS PARIS26 Campus	IONOS	Paris, France	—	6	1.38
IONOS PARIS27	IONOS	Paris, France	—	16	1.47
IONOS PARIS29 West	IONOS	Paris, France	B200	23	1.40
IONOS DUBLIN5	IONOS	Dublin, Ireland	—	14	1.22
IONOS DUBLIN10 North	IONOS	Dublin, Ireland	—	17	1.22
IONOS MILAN1 East	IONOS	Milan, Italy	H200	5	1.53
IONOS MILAN4 West	IONOS	Milan, Italy	—	15	1.26
IONOS MILAN5 South	IONOS	Milan, Italy	—	15	1.22
IONOS ZURICH1 South	IONOS	Zurich, Switzerland	—	14	1.21
IONOS ZURICH3 East	IONOS	Zurich, Switzerland	—	16	1.22
IONOS ZURICH4 South	IONOS	Zurich, Switzerland	—	19	1.29
IONOS ZURICH7 South	IONOS	Zurich, Switzerland	—	21	1.32
IONOS ZURICH9 Annex	IONOS	Zurich, Switzerland	A100	6	1.42
IONOS ZURICH10 Campus	IONOS	Zurich, Switzerland	—	8	1.45
IONOS BRUSSELS4 West	IONOS	Brussels, Belgium	—	8	1.46
IONOS BRUSSELS6 Annex	IONOS	Brussels, Belgium	—	4	1.42
IONOS BRUSSELS8 East	IONOS	Brussels, Belgium	—	17	1.49
IONOS BRUSSELS10 Annex	IONOS	Brussels, Belgium	—	22	1.36
IONOS STOCKHOLM28 South	IONOS	Stockholm, Sweden	H200	5	1.43
IONOS OSLO16 East	IONOS	Oslo, Norway	—	9	1.47
IONOS WARSAW22 Campus	IONOS	Warsaw, Poland	MI300X	18	1.28
IONOS WARSAW24 South	IONOS	Warsaw, Poland	—	14	1.35
IONOS PRAGUE15 South	IONOS	Prague, Czechia	—	8	1.51
IONOS LISBON4 Campus	IONOS	Lisbon, Portugal	MI300X	16	1.30
IONOS LISBON7	IONOS	Lisbon, Portugal	—	6	1.45
IONOS BERLIN17 Campus	IONOS	Berlin, Germany	—	17	1.23
IONOS BERLIN18 East	IONOS	Berlin, Germany	L40S	11	1.52
IONOS ROTTERDAM13 Park	IONOS	Rotterdam, Netherlands	—	18	1.31
IONOS ROTTERDAM14	IONOS	Rotterdam, Netherlands	—	5	1.45
IONOS VILNIUS2 Campus	IONOS	Vilnius, Lithuania	—	18	1.37
IONOS BELGRADE4 Campus	IONOS	Belgrade, Serbia	—	15	1.31
IONOS LUXEMBOURG3 East	IONOS	Luxembourg, Luxembourg	MI300X	9	1.52

[FAQ]

How many datacenters does IONOS operate?

46 indexed facilities totaling 768 MW across 16 countries.

Which GPUs does IONOS deploy?

MI300X, H100, B200, H200, A100, L40S

In which countries does IONOS operate?

Belgium, Czechia, France, Germany, Ireland, Italy, Lithuania, Luxembourg, Netherlands, Norway, Poland, Portugal, Serbia, Sweden, Switzerland, United Kingdom

[Knowledge Graph]

Company → Datacenter → GPU → Customer → Industry

Every entity on this site is cross-linked. Follow the graph from operators down to specific facilities, GPU clusters, customers, and sectoral context.