The short version
- An instruction set is the list of basic commands a processor understands. A game's code is compiled down to one.
- x86 is the Intel and AMD family behind gaming PCs, the PS5, Xbox Series X|S and the Steam Deck.
- Arm powers phones, the Switch and Switch 2, Apple silicon Macs and Nvidia's new RTX Spark laptops.
- Code built for one won't run on the other without translation, which is why ports, emulators and translation layers exist.
The language a chip speaks
Processors don't understand C++. They understand a fixed menu of tiny steps: add these two numbers, load this value from memory, jump to that line if something is true. That menu is the instruction set architecture, or ISA. When a studio builds a game, a compiler turns its code into those steps for one specific menu.
Two chips with the same instruction set can run the same program, even if one is far faster. A 2026 Ryzen and a 2010 Core i5 both speak x86-64. Two chips with different ones can't run each other's programs, at least not directly.
Who uses which
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x86: Intel and AMD
x86 goes back to Intel's 8086 chip from 1978. AMD extended it to 64 bits in 2003, and that version, x86-64, is what every modern gaming PC runs. Only Intel and AMD (plus a small Chinese licensee) make x86 chips, because the licences are tightly held.
Because the PS5 and Xbox Series X|S use AMD x86 chips too, PC ports of console games are easier than they used to be. It's also why fan projects can run PS4 game code directly on a PC: see our posts on the Uncharted fan port and AnyPS5.
Intel and AMD still add to it. Intel's new APX extension doubles the general-purpose registers a core can use, and Windows 11 just added a toggle for it. Here's what that means.
Arm: licensed by many
Arm, a British company, designs its instruction set and licenses it to companies like Apple, Qualcomm, MediaTek, Samsung and Nvidia, who build their own chips. Some use Arm's own core designs; others, like Apple and Qualcomm's Oryon, design their own cores that speak the Arm language.
Arm's traditional strength is efficiency, which is why it took over phones. Nintendo's Switch uses an Nvidia Arm chip, and so does the Switch 2. Apple's move to Arm Macs in 2020 showed it could also compete on raw speed.
That shared Arm base is why the unofficial nxnative project can run Switch code directly on iPhones and Macs.
Is one better?
Not in any simple way. x86 carries decades of compatibility, and its instructions are more varied and complex. Arm's are simpler and more uniform, which helps with efficiency. But modern chips from both camps translate instructions into their own internal operations anyway, so design, manufacturing process and power budget matter far more than the ISA itself.
The real difference for gamers is software. Almost every PC game is built for x86 Windows, so x86 has the library.
Crossing the line
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When code meets the "wrong" chip, there are three options:
- Emulation: software pretends to be the original chip and system. It's flexible but costly, which is why emulating a console often needs a much faster PC than the console itself.
- Translation: tools like Apple's Rosetta 2 or Windows on Arm's Prism convert x86 code to Arm, ahead of time or as it runs. The operating system does the work, and the result is usually good, but not every game cooperates.
- Recompiling: rebuild the game for the new chip. It's the cleanest result, but it needs the source code or a lot of reverse engineering. Our static recompilation explainer covers the fan version.
Why it matters right now
This is the hurdle for Arm gaming laptops like Nvidia's RTX Spark machines. Most PC games are still x86-only, so they lean on translation, and some anti-cheat systems refuse to run under it at all. AMD's Ryzen AI Max laptops, sold in India from ₹1,79,990, avoid the problem by staying x86.
Keep an eye on whether more studios ship native Arm builds of their PC games. That's what would close the gap, and the Switch 2 and Apple's Macs give developers more reasons to do it.
