Startup Chips Could Slash Data Center Energy Waste by 90%

Hannah Earley thinks computer chips have been doing math wrong for decades, and she's built the hardware to prove it.

The 31-year-old cofounder of Vaire Computing has designed chips that recycle energy usually thrown away as heat. Her breakthrough could transform how much power our devices and data centers consume.

Here's the problem she's solving: Every time your computer does a calculation, it erases information it doesn't need anymore. That erasure releases energy as heat, which is why your laptop gets hot and why data centers guzzle electricity just to stay cool.

Earley compares it to racing through a city and slamming the brakes at every intersection. You lose all your momentum and waste fuel accelerating again.

Her solution keeps the momentum going. Instead of erasing information, her chips retain it, making calculations reversible. The circuit can run backward and recover energy it would have lost.

The idea isn't new. Scientists proposed reversible computing over 50 years ago, but nobody could make it work with real hardware. Earley completely rethought the technology from scratch.

She designed a microscopic chip component called a resonator that stores recovered energy for later reuse. "It's really a glorified pendulum," she says.

Last year, Vaire announced proof it works: a chip with a resonator that recovered more energy than it lost, even after accounting for the power needed to run the component itself.

Earley's path to this breakthrough started at age nine, when she began programming. She kept diving deeper into how computers work until she reached the transistor level. During her PhD at Cambridge, she read a thesis on reversible computing and couldn't stop thinking about it.

The design didn't come easy. During the brutal winter of 2022 in Iowa, she spent weeks in a basement apartment covering whiteboards with circuit schematics while the wind chill outside hit negative 40 degrees.

When the solution finally clicked weeks later in Las Vegas, it felt less like a eureka moment and more like gradual relief. "I'm not completely out of my depth," she remembers thinking.

The Ripple Effect

If Vaire's technology scales up, the impact could be massive. Data centers currently consume about 1% of global electricity. Making them dramatically more efficient could save enough power to light millions of homes.

The benefits extend beyond environmental wins. More efficient chips mean longer battery life for phones and laptops, less money spent cooling server farms, and more computing power in the same energy budget.

Igor Markov, a researcher in electronic design automation, calls the work "something interesting" but notes it's early stage. The company will need increasingly realistic demonstrations to attract industry support.

Earley and her team have already raised over $12 million and hired reversible computing pioneer Michael Frank as a senior scientist. Now they're tackling the challenge of making their radically different chips fit into familiar devices and manufacturing systems.

She's not interested in making incremental improvements to existing technology. "I want to tackle every part of how computers are built and rethink it in these terms," Earley says.

The pendulum is swinging toward a more efficient future.