Very yes (on both).

By coin op do you mean arcade games?

If so, there were some of those. Many of them powered by Intel CPUs and 3dfx graphics cards. I actually own a Quantum 3D Graphite system (just the computer, not the whole arcade machine) that came from an Arctic Thunder ride-on arcade game. It has a Pentium III 750Mhz Socket 370 CPU, fairly standard MicroATX VIA chipset motherboard, 3dfx Voodoo 3 3000 AGP and a 20GB WD hard drive loaded with Windows 2000... along with a custom interface to attach the rest of the system, an amazingly awesome black desktop case with GRAPHITE stamped into the metal, logos for 3dfx and Q3D, lots of Midway Games stickers inside... its a really cool relic, and it actually runs the game perfectly fine, just as it would have in the arcade, I just don't have any way to control the game. I haven't yet figured out what I want to do with it, but it certainly fits the bill of an x86 coin-op system and it was well worth the $120 I paid for it.

This site has lots of info about systems like these. Just check the links under the Quantum 3D section on the left. In particular, the Graphite and Quicksilver systems.

http://www.thedodgegarage.com/3dfx/index.htm

There were several other 3dfx based arcade machines (listed under Arcade) that used MIPS processors, so were not x86.

Also, the original Xbox, the Xbox One and PS4 all use x86 CPUs. Interestingly, the CPU in the original Xbox was quite similar (733Mhz P3) to the one in my Graphite, despite the difference in graphics capabilities (Voodoo 3 vs Geforce 3 Ti 500).

loads of later era arcade systems were x86.

eg: Taito Type X from 2004+ used Embedded XP, games written with Visual Studio .net 2003.
Ran on a Celeron 2.5ghz with Radeon 9600 XT. IDE hard disk.

Sega chihiro ran a P3 733mhz + nvidia xchip, basically all Sega systems post Naomi were intel boxes.

Last Sega system is using a Core I3 + GTX650Ti

All the latest Namco, Konami, Midway cabs are PC based.

There are a few older x86 arcade machines as well. Q*Bert runs on an 8086, and Irem used the V30 in quite a few games (eg R-Type).

The Konix Multisystem used an 8086, but was never actually released.

The first xbox, used a x86 CPU.

som old gottliebs ran 8088 (reactor, mad planets, krull) but I would not really call it x86, since it was embedded and also used z80/6502, where the modern stuff is pure x86 motherboards and stuff.

Seibu SPI arcade board uses a surface-mount 386DX-25. Some have Intel-sourced ones, others use AMD Am386 (the Windows logo looks really out of place here...).

It so happens the ancient Odyssey2 was based on an Intel 8048.
https://en.wikipedia.org/wiki/Magnavox_Odyssey%C2%B2

Another good example is the FM Towns Marty (famous for its ports of some of the old Lucasarts adventures), but then the whole FM Towns line was not unlike a PC.

As for arcade games, the first one I thought of was the Quake prototype, but that was never actually released.

Jorpho wrote:

It so happens the ancient Odyssey2 was based on an Intel 8048. https://en.wikipedia.org/wiki/Magnavox_Odyssey%C2%B2 […]
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It so happens the ancient Odyssey2 was based on an Intel 8048.
https://en.wikipedia.org/wiki/Magnavox_Odyssey%C2%B2

Another good example is the FM Towns Marty (famous for its ports of some of the old Lucasarts adventures), but then the whole FM Towns line was not unlike a PC.

As for arcade games, the first one I thought of was the Quake prototype, but that was never actually released.

Man... 64 bytes of CPU RAM and 128 bytes of video RAM... and it was a gaming system. Things have certainly changed in 38 years...

My current desktop has 250 MILLION times as much RAM and 31 MILLION times as much video RAM.

... and one of my hard drives could hold somewhere between 500 MILLION and ONE BILLION Odyssey2 games if the 2-8KB cartridge ROM capacity is accurate... 😵

Those were simpler times, for sure.

The Williams Pinball 2000 system was powered by a Cyrix MediaGX: https://en.wikipedia.org/wiki/Pinball_2000

Cool system, although it basically killed off Williams' pinball division.

Sega has used core2's in there newer arcade systems.