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Microsoft Preps In-House Chips: One For AI, the Other an Arm Server CPU

The in-house chips promise to further optimize the company's AI and cloud services. And Microsoft is already busy creating the second-gen versions.

 & Michael Kan Principal Reporter

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(Credit: Microsoft)

For the first time, Microsoft has developed its own chips to power artificial intelligence programs and cloud services.

Microsoft has been secretly developing these in-house processors for years, and they were introduced today at the company's Ignite event. The first chip is the Azure Maia AI accelerator, and it’ll power some of Microsoft's largest generative AI workloads, such as Copilot

The second is an Arm-based CPU called Azure Cobalt designed to run general-purpose cloud workloads, but more efficiently and with greater performance than rival silicon. Both chips will sit inside custom-made boards and server racks that can be easily fitted inside the company’s existing data centers.   

Cobalt chip
(Credit: Microsoft)

Expect the company to install the chips into its data centers early next year. Microsoft plans on using the new silicon to power its own internal services as well as workloads from third-party customers through Microsoft Azure. 

Redmond didn’t say which chipmaker it used to manufacture the processors (rumors point to TSMC). But the company developed the silicon to squeeze even more performance from both its servers and software. Another goal is to offer Azure cloud customers more flexibility on power, performance, and cost.  

No benchmarks were posted, making the performance gains unclear. However, Microsoft’s partner and ChatGPT developer OpenAI says the Maia chip “paves the way for training more capable models and making those models cheaper for our customers.”

A custom-built rack for the Maia 100 AI Accelerator
(Credit: Microsoft)

Still, Microsoft isn’t ditching processors from major chip providers, such as Nvidia or AMD. In addition to the custom chips, the company plans on offering access to Nvidia’s H100 and H200 hardware, along with AMD’s MI300X, to Azure cloud customers looking to train their AI models. 

"Customer obsession means we provide whatever is best for our customers, and that means taking what is available in the ecosystem as well as what we have developed," said Microsoft Azure hardware CVP Rani Borker. "We will continue to work with all of our partners to deliver to the customer what they want."

Nevertheless, the company’s entry into custom silicon could put more competitive pressure on AMD, Intel, and Nvidia. It also makes us wonder if Microsoft is preparing more in-house chips for consumer PCs. Redmond has already partnered with Qualcomm to produce Arm-based SQ chips for the Surface line. 

In the meantime, Microsoft adds that the company has already started work on developing second-generation Maia and Cobalt chips.

About Our Expert

Michael Kan

Michael Kan

Principal Reporter

My Experience

I've been a journalist for over 15 years. I got my start as a schools and cities reporter in Kansas City and joined PCMag in 2017, where I cover satellite internet services, cybersecurity, PC hardware, and more. I'm currently based in San Francisco, but previously spent over five years in China, covering the country's technology sector.

Since 2020, I've covered the launch and explosive growth of SpaceX's Starlink satellite internet service, writing 600+ stories on availability and feature launches, but also the regulatory battles over the expansion of satellite constellations, fights with rival providers like AST SpaceMobile and Amazon, and the effort to expand into satellite-based mobile service. I've combed through FCC filings for the latest news and driven to remote corners of California to test Starlink's cellular service.

I also cover cyber threats, from ransomware gangs to the emergence of AI-based malware. In 2024 and 2025, the FTC forced Avast to pay consumers $16.5 million for secretly harvesting and selling their personal information to third-party clients, as revealed in my joint investigation with Motherboard.

I also cover the PC graphics card market. Pandemic-era shortages led me to camp out in front of a Best Buy to get an RTX 3000. I'm now following how the AI-driven memory shortage is impacting the entire consumer electronics market. I'm always eager to learn more, so please jump in the comments with feedback and send me tips.

The Best Tech I've Had:

  • My first video game console: a Nintendo Famicom
  • I loved my Sega Saturn despite PlayStation's popularity.
  • The iPod Video I received as a gift in college
  • Xbox 360 FTW
  • The Galaxy Nexus was the first smartphone I was proud to own.
  • The PC desktop I built in 2013, which still works to this day.

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