Arm-based servers overtake x86 as top AI platform

A tectonic shift in data center architecture has reached a milestone: Arm-based rack-scale GPU servers have surpassed x86 systems as the dominant accelerated computing platform, according to new data from IDC published this week.

The Numbers Behind the Shift

IDC's latest findings show that AI infrastructure spending reached $89.7 billion in the first quarter of 2026, with non-x86 accelerated servers — overwhelmingly Arm-based — jumping to $53 billion, up from $47.5 billion in Q4 2025. Meanwhile, x86 accelerated server spending declined to $34.6 billion from $42.7 billion in the prior quarter. The reversal has been swift: as recently as Q3 2025, x86 accelerated servers still led at $51.9 billion compared to $29.8 billion for Arm.FuTu News

The broader server market hit a record $122.6 billion in revenue during Q1 2026, up 30.4% year-over-year, with accelerated systems — GPUs, custom ASICs, and FPGAs — generating more than 70% of total server revenue. Non-x86 servers overall reached $58.7 billion, representing 47.9% of total server market revenue.Tom's Hardware+1

Hyperscalers Drive the Transition

The shift is being driven by hyperscale cloud providers adopting Nvidia's ↗ 2.78% rack-scale AI systems, which are built on Arm ↗ 4.74% architecture. Nvidia's Vera Rubin platform, unveiled at CES 2026, integrates Arm-based Vera CPUs alongside Rubin GPUs in a co-designed rack-scale system optimized for training, inference, and agentic AI workloads. Custom Arm-based CPUs from Google Alphabet Inc. ↗ 0.78% and Microsoft ↘ 0.99% also contribute to the non-x86 surge.Arm Newsroom+2

IDC raised its full-year 2026 AI infrastructure spending forecast to $497 billion, a nearly 56% year-over-year increase, and now projects the market will surpass $1 trillion by 2029.IDC+1

Arm's Data Center Ambitions

Arm's financial results reflect this momentum. In its fiscal year ended March 2026, the company reported record revenue of $4.92 billion, up 23% year-over-year, with data center royalties more than doubling compared to the prior year. CEO Rene Haas told CNBC in February that "our data center business is growing like crazy", and the company has projected that its new in-house data center chip could generate $15 billion in annual revenue by 2031.CNBC+3

The data center is now on track to become Arm's largest revenue source, displacing mobile — a prospect that seemed unlikely just a few years ago when x86 dominated server rooms and Arm was known primarily for powering smartphones.