Centaur Technology was an x86 CPU design company started in 1995 and subsequently a wholly owned subsidiary of VIA Technologies. In 2015, the documentary Rise of the Centaur covered the early history of the company. The company was broken up in 2021.

History

Centaur Technologies Inc. was founded in April 1995 by Glenn Henry, Terry Parks, Darius Gaskins, and Al Sato. The funding was provided by Integrated Device Technology, Inc (IDT). The business goal was to develop compatible x86 processors that were less expensive than Intel processors and consumed less power. There were two main elements of the plan: While funded by IDT, three different Centaur designs were shipped under the marketing name of WinChip. In September 1999, Centaur was purchased from IDT by VIA Technologies, a Taiwanese company. Since then, five designs have shipped with the marketing name of VIA C3, as well as a number of designs for the VIA C7 processor and their latest 64-bit CPU, the VIA Nano. The VIA Nano design has been further refined and improved in chips produced by Zhaoxin (a VIA joint venture company). In late 2019, Centaur announced the "World’s First High-Performance x86 SoC with Integrated AI Coprocessor", the CNS core. In November 2021, Intel recruited the majority of the employees of the Centaur Technology division from VIA, a deal worth $125 million, effectively acquiring the talent and know-how of the x86 division. VIA retained the x86 licence and associated patents, and its Zhaoxin CPU joint-venture continues.

Design methodology

Centaur's chips historically have been much smaller than comparable x86 designs at their time, and they are thus cheaper to manufacture and consume less power. This made them attractive in the embedded marketplace. Centaur's design philosophy was always centered on "sufficient" performance for tasks that its target market demands. Some of the design trade-offs made by the design team ran contrary to accepted wisdom. Centaur/VIA was among the first to design processors with hardware encryption acceleration in the form of VIA PadLock, starting with a 2004 VIA C7 release. Intel and AMD followed up with AES-NI in 2008, Intel SHA extensions in 2013, and RDRAND in 2015.

VIA C3

VIA C7

VIA Nano

CNS core

Centaur announced a new x86-64 "CNS" CPU with AVX-512 support and integrated AI coprocessor in late 2019. The CNS CPU was cancelled in 2021 when VIA sold its Centaur division to Intel. The CNS core CPUs had up to 8 cores and ran at a 2 GHz base frequency. It used the same LGA2011 pin socket as Intel's LGA2011-3 CPUs, however it is not electrically compatible with Intel motherboards. The CNS CPU cores were made on the TSMC 16 nm node. Some of the advancements made on CNS were later used in some Zhaoxin Semiconductor CPUs in which VIA is in a joint venture with.

Comparative die size

Note: Even the 180 nm Duron Morgan core (106 mm²) with a 64K secondary cache, when shrunk down to a 130 nm process, would have still had a die size of 76 mm². The VIA x86 core is smaller and cheaper to produce. As can be seen in this table, almost four C7 cores could be manufactured in the same area as a one-P4 Prescott core on 90 nm process.