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A year ago, Amazon.com (NASDAQ:AMZN) introduceda custom Arm-based processor called Graviton to help power workloads at Amazon Web Services (AWS), the company's booming and highly profitable cloud infrastructure business. Amazon had acquired Israel-based chip designer Annapurna Labs in 2015 for an estimated$350 million, paving the way for the tech juggernaut's custom silicon strategy.

"A few years ago the team started to think about building an Amazon-built custom CPU designed for cost-sensitive scale-out workloads," AWS Chief Evangelist Jeff Barr wrote at the time. Amazon is now reportedly preparing its second-generation custom server chip for prime time.

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Reuters reported last week that AWS is almost done working on the chip, which is expected to be approximately 20% faster than the first-generation silicon. AWS is the largest cloud infrastructure provider in the world, giving it a greater incentive to pursue cost-saving measures by bringing chip development in-house, despite the billions that is necessary to invest in custom chip design.

The move will also help reduce Amazon's dependence on Intel (NASDAQ:INTC), which dominates the server chip market. Advanced Micro Deviceshas been making inroads, but Intel still commanded over95% market share in the third quarter, according to Mercury Research.

The second-generation chip is expected to use Arm's Neoverse N1 architecture, according to the report. That chip techis designed specifically for data centers, offering 2.5 times the performance for data center workloads while improving power efficiency compared to Arm's Cortex A72 architecture, which Graviton is based on. Amazon might double the number of computing cores from 16 to 32, a source told the outlet.

Data centers are critically important for both Amazon and Intel. AWS generated nearly $2.1 billion in operating income lastquarter, or 56% of Amazon's consolidated operating profits despite representing just 12% of revenue. Intel's Data Center Group (DCG) similarly carries outsize profitability, accounting for 48% of operating income in the thirdquarter and 33% of sales.

Apple kicked off the custom chip trend a decade ago -- the Cupertino behemoth is also working on Arm-based chips that could one day displace Intel processors in Macs -- and now designs nearly all of its most important components for the iPhone. Alphabet subsidiary Google has its custom Titan security chip, Facebook is hiring semiconductor engineers to make custom chips, and most recently Microsoft jumped on the bandwagon with a custom SQ1 chip that powers its new Surface Pro X.

Custom silicon is only a viable strategy for large, deep-pocketed tech companies, considering the hefty development costs. Over time, the hope is that those investments pay off in the form of optimized performance and lower operating costs.

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Amazon Is Reportedly Preparing to Launch Its Second Custom Server Chip - The Motley Fool