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
Digital Realty IAD	Digital Realty	Ashburn, VA, USA	Mixed	100	1.38
Digital Realty CLT	Digital Realty	Charlotte, NC, USA	Mixed	60	1.36
Digital Realty DFW	Digital Realty	Dallas, TX, USA	Mixed	85	1.34
Digital Realty AMS17	Digital Realty	Amsterdam, Netherlands	Mixed	40	1.28
Digital Realty FRA15	Digital Realty	Frankfurt, Germany	Mixed	80	1.30
Digital Realty ASHBURN24	Digital Realty	Ashburn, VA, USA	—	47	1.32
Digital Realty ASHBURN28 South	Digital Realty	Ashburn, VA, USA	H200	41	1.29
Digital Realty ASHBURN58 West	Digital Realty	Ashburn, VA, USA	—	34	1.21

Digital Realty NEW38 Annex

Company → Datacenter → GPU → Customer → Industry