x86 vs. x64: What’s the Difference?

March 20, 2025 / General Discussion

Choosing between x86 and x64 architectures is important for anyone who wants their computer to run well and work with different programs. This article explains the main differences between x86 and x64 processors and how they affect how your computer works and runs applications. We’ll also show you how to quickly check which architecture your computer is using.

Key Differences Between x86 and x64

The main difference between x86 and x64 architectures is how much memory they can use. x86 processors can only use up to 4 GB of RAM because they work with 32 bits. On the other hand, x64 processors, which are 64-bit, can use a lot more memory—up to 16 exabytes in theory.

Another difference is the size of the registers, which are like tiny storage areas inside the processor. x86 processors have 32-bit registers, while x64 processors have 64-bit registers. This means x64 processors can handle more data at once, which can make them faster.

When it comes to performance, x64 processors are usually better than x86 processors because they can access more memory and handle more data at once. But how much faster they are can depend on what you’re doing and what software you’re using.
Software compatibility is also important. Some older programs only work on x86 systems, while many modern operating systems and programs are moving to x64. You need to make sure the software you want to use works with the architecture you choose.

Checking Your System Architecture

You can find out if your computer is using x86 or x64 architecture by using simple commands in the terminal. Here’s how to do it on a Linux system.

Checking the Operating System

Open the terminal and type this command:

uname -m

If it says “x86_64,” your operating system is 64-bit.

Checking the CPU

To check if your CPU matches, use this command:

lscpu | grep Architecture

Usually, the results will match what you saw before. But sometimes, a newer CPU can pretend to be an older one, so the results might not match.

Understanding Software Compatibility

When choosing between x86 and x64, you need to think about the software you use. Some old programs might not work on x64 systems, so you might need special settings or virtual machines to run them. Make sure the programs you need are compatible with the architecture you choose.

Conclusion

Knowing the differences between x86 and x64 architectures helps you pick the right hardware and make sure your software works well. As computers keep getting better, understanding these basics will help you make good choices for your system.

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