Power Problems Threaten to Strangle Exascale Computing

Three possible solutions: specialized architectures, millivolt switches, and 3-D memory

4 min read
Power Problems Threaten to Strangle Exascale Computing
Stacks Up Nicely: A 3-D memory stack from Tezzaron Semiconductor boosts speed and reduces power draw.
Photo: Tezzaron Semiconductor

/img/quantumNewV2-1451401939930.jpg Exascale Trade-offs The road to an exaflops supercomputer won’t be smooth. The millivolt switch, for example, would dramatically reduce power draw. But how to make one, and when it would be ready, is anybody’s guess.

For most of the decade, experts in high-performance computing have had their sights set on exascale computers—supercomputers capable of performing 1 million trillion floating-point operations per second, or 1 exaflops. And we’re now at the point where one could be built, experts say, but at ridiculous cost.

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The Future of Deep Learning Is Photonic

Computing with light could slash the energy needs of neural networks

10 min read

This computer rendering depicts the pattern on a photonic chip that the author and his colleagues have devised for performing neural-network calculations using light.

Alexander Sludds

Think of the many tasks to which computers are being applied that in the not-so-distant past required human intuition. Computers routinely identify objects in images, transcribe speech, translate between languages, diagnose medical conditions, play complex games, and drive cars.

The technique that has empowered these stunning developments is called deep learning, a term that refers to mathematical models known as artificial neural networks. Deep learning is a subfield of machine learning, a branch of computer science based on fitting complex models to data.

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