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

STACK EMEA

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

Datacenter Portfolio

[AI Summary]

STACK EMEA runs 45 indexed datacenters across 14 countries, totaling 730 MW of IT capacity. The portfolio spans colocation tiers and deploys B200, MI300X, H100, A100, H200, L40S.

Facilities

730 MW

Total IT

Countries

GPU SKUs

[Facilities · 45]

Facility	Operator	Location	GPU	MW	PUE
STACK EMEA LONDON3 South	STACK EMEA	London, United Kingdom	—	44	1.31
STACK EMEA LONDON33 South	STACK EMEA	London, United Kingdom	—	9	1.44
STACK EMEA LONDON42 Park	STACK EMEA	London, United Kingdom	—	8	1.33
STACK EMEA LONDON44 Annex	STACK EMEA	London, United Kingdom	—	35	1.28
STACK EMEA LONDON114 North	STACK EMEA	London, United Kingdom	B200	26	1.53
STACK EMEA FRANKFURT22 Annex	STACK EMEA	Frankfurt, Germany	—	20	1.51
STACK EMEA FRANKFURT67 Park	STACK EMEA	Frankfurt, Germany	—	24	1.52
STACK EMEA AMSTERDAM7 Campus	STACK EMEA	Amsterdam, Netherlands	—	29	1.25
STACK EMEA AMSTERDAM26 East	STACK EMEA	Amsterdam, Netherlands	—	38	1.34
STACK EMEA AMSTERDAM89 West	STACK EMEA	Amsterdam, Netherlands	—	40	1.25
STACK EMEA PARIS5 Campus	STACK EMEA	Paris, France	—	35	1.34
STACK EMEA PARIS9 Annex	STACK EMEA	Paris, France	MI300X	26	1.25
STACK EMEA PARIS53 Campus	STACK EMEA	Paris, France	B200	16	1.50
STACK EMEA PARIS55 North	STACK EMEA	Paris, France	—	4	1.37
STACK EMEA PARIS57 Park	STACK EMEA	Paris, France	—	11	1.46
STACK EMEA PARIS72 South	STACK EMEA	Paris, France	—	19	1.51
STACK EMEA PARIS76 North	STACK EMEA	Paris, France	—	17	1.49
STACK EMEA PARIS81 South	STACK EMEA	Paris, France	—	14	1.46
STACK EMEA PARIS85 Annex	STACK EMEA	Paris, France	—	35	1.30
STACK EMEA MARSEILLE19 South	STACK EMEA	Marseille, France	H100	14	1.21
STACK EMEA DUBLIN32 North	STACK EMEA	Dublin, Ireland	A100	24	1.33
STACK EMEA MADRID10 North	STACK EMEA	Madrid, Spain	—	12	1.49
STACK EMEA MILAN22 South	STACK EMEA	Milan, Italy	—	18	1.27
STACK EMEA MILAN31 Central	STACK EMEA	Milan, Italy	A100	10	1.44
STACK EMEA MILAN33 East	STACK EMEA	Milan, Italy	—	20	1.29
STACK EMEA MILAN35 Campus	STACK EMEA	Milan, Italy	H200	26	1.33
STACK EMEA MILAN39 Central	STACK EMEA	Milan, Italy	—	19	1.30
STACK EMEA ROME1 West	STACK EMEA	Rome, Italy	—	12	1.21
STACK EMEA ROME5 Park	STACK EMEA	Rome, Italy	—	5	1.45
STACK EMEA ZURICH24 South	STACK EMEA	Zurich, Switzerland	H200	8	1.46
STACK EMEA STOCKHOLM5 Campus	STACK EMEA	Stockholm, Sweden	—	9	1.28
STACK EMEA OSLO8 Annex	STACK EMEA	Oslo, Norway	A100	9	1.46
STACK EMEA HELSINKI2 Annex	STACK EMEA	Helsinki, Finland	—	16	1.25
STACK EMEA SOFIA11 North	STACK EMEA	Sofia, Bulgaria	L40S	4	1.26
STACK EMEA ATHENS3 Annex	STACK EMEA	Athens, Greece	—	6	1.45
STACK EMEA ATHENS7	STACK EMEA	Athens, Greece	B200	14	1.25
STACK EMEA ATHENS9 Central	STACK EMEA	Athens, Greece	—	6	1.47
STACK EMEA BERLIN30	STACK EMEA	Berlin, Germany	—	2	1.36
STACK EMEA MUNICH12 West	STACK EMEA	Munich, Germany	—	7	1.46
STACK EMEA MUNICH20 South	STACK EMEA	Munich, Germany	—	17	1.29
STACK EMEA HAMBURG2 South	STACK EMEA	Hamburg, Germany	—	4	1.40
STACK EMEA HAMBURG10 West	STACK EMEA	Hamburg, Germany	—	2	1.38
STACK EMEA REYKJAVIK1 South	STACK EMEA	Reykjavik, Iceland	H100	5	1.42
STACK EMEA REYKJAVIK5 West	STACK EMEA	Reykjavik, Iceland	B200	9	1.51
STACK EMEA REYKJAVIK9 South	STACK EMEA	Reykjavik, Iceland	A100	2	1.37

[FAQ]

How many datacenters does STACK EMEA operate?

45 indexed facilities totaling 730 MW across 14 countries.

Which GPUs does STACK EMEA deploy?

B200, MI300X, H100, A100, H200, L40S

In which countries does STACK EMEA operate?

Bulgaria, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Netherlands, Norway, Spain, 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.