Intel Calls It Quits on x86S Architecture After Just 18 Months

In May 2023, Intel announced the x86S architecture, dedicated to a pure 64-bit framework and eliminating the legacy 16/32-bit components, essentially creating a streamlined 64-bit mode.

However, just a year and a half later, Intel has declared it will abandon this architecture and cease its development. This decision came after the formation of the x86 Ecosystem Advisory Group, including members from Intel, AMD, Google, and many industry giants, to collectively define the future of the x86 instruction set.

Intel stated to Tom’s Hardware:

"We remain firmly committed to the x86 architecture, as evidenced by our collaboration with AMD and other industry leaders in establishing the x86 Ecosystem Advisory Group. The creation of this group underscores our determination for a robust future for x86. Although we have discontinued the x86S initiative, our focus continues to be on driving innovation and collaboration within the x86 ecosystem."

The x86S architecture, while promising, involved significant compatibility changes, especially as the pure 64-bit architecture would abandon 16-bit and 32-bit components—a move impossible without AMD’s involvement considering industry standards.

Presently, Intel and AMD are the main leaders in the x86 architecture domain, necessitating a standardized duopoly. The x86 Ecosystem Advisory Group aims to achieve this purpose.

Notably, although Intel has abandoned the x86S architecture, it may gradually share some of its initial plans with AMD to foster the development of the x86 architecture. This, however, requires extensive discussion due to the involvement of numerous stakeholders.

Intel's original expectations for the x86S architecture included moving towards a pure 64-bit architecture, reducing overall software and hardware architecture complexity by eliminating old components, and providing segmented support for 32-bit applications through a 64-bit segmented model.