Fastest Supercomputer - Summit

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To keep Summit from overheating, more than 4,000 gallons of water pump through its cooling system every minute, according to Oak Ridge National Laboratory where the beast is housed.

It's shiny, fast and ultrapowerful. But it's not the latest Alpha Romeo. A physics laboratory in Tennessee just unveiled Summit, likely to be named the world's speediest and smartest supercomputer.

Perhaps most exciting for the U.S.? It's faster than China's.

The supercomputer — which fills a server room the size of two tennis courts — can spit out answers to 200 quadrillion (or 200 with 15 zeros) calculations per second, or 200 petaflops, according to Oak Ridge National Laboratory, where the supercomputer resides.

"If every person on Earth completed one calculation per second, it would take the world population 305 days to do what Summit can do in 1 second," according to an ORNL statement.

Put another way, if one person were to run the calculations, hypothetically, it would take 2.3 trillion days, or 6.35 billion years. [9 Super-Cool Uses for Supercomputers]

The former "world's fastest supercomputer," called Sunway TaihuLight, can perform 93,000 calculations a second (93 petaflops), while humming away inside China's National Supercomputing Center in Wuxi.

Basically, unlike older computer chips, these chips are optimized for a special type of mathematical operation on matrices — or rectangles filled with numbers with rules for adding, subtracting and multiplying the different rows and columns. Computers equipped with AI programs often learn using so-called neural networks, which have several layers in which lower calculations feed into higher ones. And this process requires the heavy use of matrices.

"This is a brand-new feature that has allowed us to break the exascale barrier," Jacobson said, referring to a processing speed that's over a billion billion calculations per second.

In addition, Summit has loads of superfast memory (RAM) available on each of its nodes, where localized calculations can take place.

"Each node on Summit has 512 Gb [gigabytes] of RAM and the network that communicates between nodes uses adaptive routing, and is thus incredibly fast, which helps us scale the calculation across all the nodes very efficiently," Jacobson said. So-called adaptive routing means Summit has some flexibility in how it runs calculations — sort of like networks of brain cells connected to synapses.

And though pricey — a New York Times report puts the cost at $200 million — Summit could deliver big for science: The supercomputer is built to integrate artificial intelligence into its computing, which could make Summit a formidable foe in the battle for answers to some of the world's most complex mysteries.

Full article here: https://www.livescience.com/62827-fastest-supercomputer.html