Know Your Data Center

Microsoft Project Osmium is an AI data center in Cumming, Iowa, developed or operated by Microsoft for OpenAI. Satellite imagery shows its computers drawing about 190 MW today.

Location

5855 SW Kerry St, Cumming, IA 50061Map pin is approximate (city)

Developer / owner

Microsoft

AI users / tenants

OpenAI

Electric utility / energy

Not disclosed

Water

Not disclosed

Chips

A100, H100, B200

First public record

Dec 18, 2018

Home electricity price in Iowa, August 2026

17.1¢per kWh+10.2% vs. August 2025

U.S. average: 18.2¢ (+3.4%).

Statewide context, not this project’s effect: prices move for many reasons. Source: U.S. Energy Information Administration.

Satellite estimate at full build-out

190 MW

used by the computers, by 2025

Running now (satellite)

190 MW

100% of the build-out estimate

Satellite figures are Epoch AI estimates from imagery of buildings, cooling and power equipment; about 80% fall within a factor of 1.4 of the true value.

Jun 16, 2026Satellite analysis by Epoch AI · 190 MW in use
No notable changes since October.
Oct 8, 2025Satellite analysis by Epoch AI · 190 MW in use
Site already complete.
Mar 1, 2025Satellite analysis by Epoch AI · 190 MW in use
Building 3-4 operational, no visible construction.
Jun 30, 2023Satellite analysis by Epoch AI · 95 MW in use
Building 2 is operational. Estimated based on Microsoft H100 count 2023
Jan 1, 2021Satellite analysis by Epoch AI · 48 MW in use
Building 1 and 1st building on the site are operational. Foundation work begins on Building 2
Dec 18, 2018Satellite analysis by Epoch AI · 0 MW in use
Land clearing begins on the north part of the site

No hearings, court cases, approvals or disputes are on record for this project yet.

Compute running now

155,634

H100-equivalents

Chip types (all phases)

A100, H100, B200

Capital cost now (est.)

$7.2B

$7.2B at build-out

Chip	Designer	Units	As of	Count is
A100	Nvidia	25,000	Jan 1, 2021	Estimate
H100	Nvidia	32,680	Jun 30, 2023	Estimate
B200	Nvidia	45,455	Mar 1, 2025	Estimate

Source: Epoch AI, AI data centers, CC BY 4.0

Satellite and capacity estimates via Epoch AI (CC BY 4.0)

SemiAnalysis article with IT power estimations and detailing usage by OpenAI for training GPT 3.5 newsletter.semianalysis.com
DCD Article on site expansion datacenterdynamics.com
MISO Announcement reporting power for newest buildings, likely an overestimate cdn.misoenergy.org
Microsoft article on data centers in Iowa used by OpenAI news.microsoft.com
Epoch AI calculation sheet for this site

Satellite estimates: Epoch AI, CC BY 4.0, reformatted for this page.