Designing AI data centers to blend seamlessly into their surroundings.

Most people pass by the massive electrical substations that power their neighborhoods without giving them a second thought. For decades, the same could be said of data centers, those inconspicuous warehouses quietly powering the world’s technology. But as artificial intelligence and cloud computing have surged to the forefront, these once-unremarkable buildings have become a focal point of public conversation - drawing scrutiny for their energy and water use, noise, and local impact.

Sean James has witnessed this evolution firsthand. Now a distinguished engineer in energy systems at Nvidia, James previously spent 25 years at Microsoft, designing and building data centers. In the early years of his career, if he told someone he built data centers, the response was often a blank stare. “And only in the last five years did people know what one even was,” he recalls. Now, he is routinely asked about their resource demands and environmental effects.

The technology behind data centers, James argues, should be mature enough to fade back into the background, just like the utilities they rely on. In a notebook from 2015, he had scribbled one of his top career goals: "disappear the data center." The concept, inspired by Mark Weiser's observation that "the most profound technologies are those that disappear," frames James's mission - not to hide data centers, but to make them as unremarkable as water mains or substations.

For decades, data center innovators quietly pursued this goal, driving improvements in reliability and efficiency. New cooling methods, such as evaporative cooling, replaced energy-hungry chillers, while server companies relaxed temperature requirements to simplify climate control. Power usage effectiveness (PUE) - a key metric of data center efficiency - fell from as high as 3 to 5 in the 1990s to today’s average of 1.2 to 1.5, according to James. Waste, too, has shrunk, with reusable packaging replacing piles of foam.

Despite these gains, today’s data centers have not yet truly vanished from public notice, James admits. Many generate noise, traffic, and other disruptions that make them unwanted neighbors. Data center load fluctuations are now sizable enough to warrant high-level alerts from the North American Electric Reliability Corporation (NERC), which issued a rare Level 3 alert this May after more than 1,000 megawatts of data center load dropped off the grid in seconds. Such shifts can destabilize the electrical grid, even while onsite batteries keep servers running seamlessly.

Still, the sector continues to evolve. Nvidia recently announced a data center design that operates coolant at up to 113 degrees Fahrenheit - a temperature so high that in most climates, heat can be expelled without traditional water-intensive cooling towers, bringing water usage at the site down to zero. The industry is also looking to become a grid asset, flexing capacity in response to grid stress and replacing diesel generators with batteries and fuel cells.

For James and others in the field, criticism of data centers is a critical feedback loop that drives further innovation. They want data centers to one day return to the background, efficiently and sustainably supporting society just as other essential infrastructure does. As James and his peers continue pushing for lower resource use, improved safety, and smarter integration with existing utilities, their ultimate objective is to make the presence of data centers so unremarkable that hardly anyone notices them at all.