Datacenters are the backbone of our digital universe. Servers, the building blocks for today's datacenters, have been riding the Moore's Law of exponential growth in silicon density for over half a century. Like all exponentials, Moore's Law is also coming to an end with major implications for growth in datacenters, their energy demands and environmental impact. Our group is exploring how to build datacenters that are sustainable, secure and scale with cost and performance beyond Moore's Law.