Alternative processors tapped to fulfill supercomputing's need for speed

GPUs, FPGAs are drawing interest at this year's Supercomputing 15 conference as it becomes obvious CPUs aren't enough.

The 20-petaflop Titan supercomputer at the Oak Ridge National Laboratory Credit: Oak Ridge National Laboratory

The 20-petaflop Titan supercomputer at the Oak Ridge National Laboratory Credit: Oak Ridge National Laboratory

As world powers compete to build the fastest supercomputers, more attention is being paid to alternative processing technologies as a way to add more horsepower to such systems.

One thing is clear: It is becoming prohibitive to build blazing CPU-only supercomputers, due to power and space constraints. That's where powerful coprocessors step in -- the processors work in conjuction with CPUs to conduct complex calculations in a power-efficient manner.

Coprocessors are an important topic at this week's Supercomputing 15 conference in Austin, Texas. According to the Top500 list of the fastest supercomputers, released on Monday, 104 systems used coprocessors, growing from 90 systems in a list released in July.

The world's fastest computer -- Tianhe-2 in China -- uses Intel's specialized Xeon Phi coprocessor, which mixes conventional x86 CPUs with vector processors. Of the 104 coprocessor supercomputers, 70 have Nvidia's graphics processors, which also benefit graphical simulations.

There's also a growing interest in FPGAs (field programmable gate arrays), which are good for specific tasks. Microsoft uses FPGAs to deliver faster Bing search results and believes they could help in high-performance computing. The company last week said it would make servers based on its Project Catapult design, which mixes FPGAs and CPUs, available to researchers via the Texas Advanced Computing Center, which is in Austin.

The number of supercomputers with coprocessors will continue to grow as more applications are written to take advantage of them, said Nathan Brookwood, principal analyst at Insight 64.

Coprocessors are faster than conventional CPUs, Brookwood said. The simultaneous execution of tasks on coprocessors has helped systems reach desired performance targets, and that trend will continue to advance.

The immediate goal is to surpass the performance barrier of 100 petaflops, which countries and companies hope to reach by 2018. The U.S. Department of Energy plans to deploy a 180-petaflop supercomputer, code-named Aurora, by 2019. China's Tianhe-2 supercomputer today offers peak performance of 54.9 petaflops with the help of a coprocessor, and 33.86 petaflops without a coprocessor.

GPUs have been used in supercomputers for many years, and Nvidia and AMD are loading more memory and frame buffers on GPUs. FPGAs are more specialized and could find use in machine learning and neural networks, Brookwood said.

"Whether FPGAs are going to be a general trend -- it's too soon to say," Brookwood said.

Faster computers give nations boasting rights about technology progress. Such systems are also vital to national economic, security, scientific and environmental programs. Supercomputers are used to develop advanced weapons, simulate economic models and predict weather.

But boosting computing performance while reducing power consumption is becoming a challenge in conventional computers. Research is ongoing in alternative computing technologies to push supercomputing into the future. Last week the Los Alamos National Laboratory purchased a quantum computer from D-Wave Systems for research into the future of computing.

Beyond CPUs and coprocessors, other supercomputing technologies are being discussed at the show that could boost overall performance. Supercomputers could get photonics technology, in which light is used to speed up data faster between CPUs, memory and storage. Also being discussed at the conference are new memory technologies like HMC (Hybrid Memory Cube), which allows more memory capacity by stacking modules.

Join the newsletter!


Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Tags Supercomputing15

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Agam Shah

IDG News Service
Show Comments


Brother MFC-L3745CDW Colour Laser Multifunction

Learn more >



Sony WH-1000XM4 Wireless Noise Cancelling Headphones

Learn more >


Back To Business Guide

Click for more ›

Brand Post

Most Popular Reviews

Latest Articles


PCW Evaluation Team

Tom Pope

Dynabook Portégé X30L-G

Ultimately this laptop has achieved everything I would hope for in a laptop for work, while fitting that into a form factor and weight that is remarkable.

Tom Sellers


This smart laptop was enjoyable to use and great to work on – creating content was super simple.

Lolita Wang


It really doesn’t get more “gaming laptop” than this.

Jack Jeffries


As the Maserati or BMW of laptops, it would fit perfectly in the hands of a professional needing firepower under the hood, sophistication and class on the surface, and gaming prowess (sports mode if you will) in between.

Taylor Carr


The MSI PS63 is an amazing laptop and I would definitely consider buying one in the future.

Christopher Low

Brother RJ-4230B

This small mobile printer is exactly what I need for invoicing and other jobs such as sending fellow tradesman details or step-by-step instructions that I can easily print off from my phone or the Web.

Featured Content

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?