/Cerebras Launches new AI Super Computing Processor

Cerebras Launches new AI Super Computing Processor

Summary: Cerebras Systems has unveiled its new Wafer Scale Engine 2 processor with a record-setting 2.6 trillion transistors and 850,000 AI-optimized cores.

Original author and publication date: Dean Takahashi – April 29, 2021

Futurizonte Editor’s Note: The Internet existed for decades before it became commercially available. Same thing with super computers.

From the article:

Cerebras Systems has unveiled its new Wafer Scale Engine 2 processor with a record-setting 2.6 trillion transistors and 850,000 AI-optimized cores. It’s built for supercomputing tasks, and it’s the second time since 2019 that Los Altos, California-based Cerebras has unveiled a chip that is basically an entire wafer.

Chipmakers normally slice a wafer from a 12-inch-diameter ingot of silicon to process in a chip factory. Once processed, the wafer is sliced into hundreds of separate chips that can be used in electronic hardware.

But Cerebras, started by SeaMicro founder Andrew Feldman, takes that wafer and makes a single, massive chip out of it. Each piece of the chip, dubbed a core, is interconnected in a sophisticated way to other cores. The interconnections are designed to keep all the cores functioning at high speeds so the transistors can work together as one.

TWICE AS GOOD AS THE CS-1
In 2019, Cerebras could fit 400,000 cores and 1.2 billion transistors on a wafer chip, the CS-1. It was built with a 16-nanometer manufacturing process. But the new chip is built with a high-end 7-nanometer process, meaning the width between circuits is seven billionths of a meter. With such miniaturization, Cerebras can cram a lot more transistors in the same 12-inch wafer, Feldman said. It cuts that circular wafer into a square that is eight inches by eight inches, and ships the device in that form.

“We have 123 times more cores and 1,000 times more memory on chip and 12,000 times more memory bandwidth and 45,000 times more fabric bandwidth,” Feldman said in an interview with VentureBeat. “We were aggressive on scaling geometry, and we made a set of microarchitecture improvements.”

Now Cerebras’ WSE-2 chip has more than twice as many cores and transistors. By comparison the largest graphics processing unit (GPU) has only 54 billion transistors — 2.55 trillion fewer transistors than the WSE-2. The WSE-2 also has 123 times more cores and 1,000 times more high performance on-chip high memory than GPU competitors. Many of the Cerebras cores are redundant in case one part fails.

“This is a great achievement, especially when considering that the world’s third largest chip is 2.55 trillion transistors smaller than the WSE-2,” said Linley Gwennap, principal analyst at The Linley Group, in a statement.

Feldman half-joked that this should prove that Cerebras is not a one-trick pony.

“What this avoids is all the complexity of trying to tie together lots of little things,” Feldman said. “When you have to build a cluster of GPUs, you have to spread your model across multiple nodes. You have to deal with device memory sizes and memory bandwidth constraints and communication and synchronization overheads.”

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