It's quite common. "Embedded" doesn't mean just "low power and little number crunching ability", it's just a fancy way of saying "special purpose". E.g.: https:

It's quite common. "Embedded" doesn't mean just "low power and little number crunching ability", it's just a fancy way of saying "special purpose". E.g.: https://buy.advantech.com/Industrial-Computers/Fanless-Industrial-PCs/model-MIC-7700H-00A1.htm https://buy.advantech.com/Industrial-Computers/Fanless-Indus... is an industrial computer; https://www.edge-core.com/productsInfo.php?cls=&cls2=&cls3=15&id=1 https://www.edge-core.com/productsInfo.php?cls=&cls2=&cls3=1... is a "whitebox" switch, but it's a representative of many OEM/ODM designs. x86-64 is a great architecture for many applications. It's cheap (due to volume), well-understood, has great compatibility, and is pretty much the best-supported architecture when it comes to software. Edit: that being said, no, this doesn't have any embedded use today. Embedded x86 isn't 386 processors anymore. The typical scenario for an embedded x86-64 is "I need to drive this specific application and I want to leverage the Linux/FreeBSD/Windows environment for programming". That already puts you way ahead of the point where writing assembly code is useful performance-wise, and you probably don't want to put ASM code you downloaded off the Internet in a network-facing position :-).