What does x64 and x86 mean?
The first 64 bit edition of Windows was given the title Windows XP x64 . And I guess the term x64 stuck from there. The x86 moniker comes from the 32bit instruction set. So all x86 processors (without a leading 80 ) run the same 32 bit instruction set (and hence are all compatible).
If you use it on a 64bit operating system you will run into limitations such as the processor not being able to access all 4GB+ of ram. The same goes for using a x64 on a 32bit. It will function fine but it is not being used up too it's full potential. Basically, x86 = 32bit(>3.5GB RAM), x64 = 64bit(4GB RAM+).
- The terms 32-bit and 64-bit refer to the way a computer's processor (also called a CPU), handles information. The 64-bit version of Windows handles large amounts of random access memory (RAM) more effectively than a 32-bit system.
- x86 refers to the processors that followed Intel's 8086 microprocessor. After this one, you had 80186, 80286 and then the 80386, the first one with 32-bits addressing on the family. So the name x86 is not related to the amount of bits of addressable memory.
- x86-64 (also known as x64, x86_64, AMD64 and Intel 64) is the 64-bit version of the x86 instruction set.
There will be an entry under System called System Type listed. If it lists 32-bit Operating System, than the PC is running the 32-bit (x86) version of Windows. If it lists 64-bit Operating System, than the PC is running the 64-bit (x64) version of Windows.
- Method 1: View the System window in Control Panel
- Click Start. , type system in the Start Search box, and then click system in the Programs list.
- The operating system is displayed as follows: For a 64-bit version operating system, 64-bit Operating System appears for the System type under System.
- Starting with Windows Vista, the 64-bit versions of Windows have two Program Files folders. The regular Program Files folder holds 64-bit applications, while "Program Files (x86)" is used for 32-bit applications. See Program Files and x86.
- The x86 moniker comes from the 32bit instruction set. So all x86 processors (without a leading 80 ) run the same 32 bit instruction set (and hence are all compatible). So x86 has become a defacto name for that set (and hence 32 bit). AMD's original 64 bit extension on the x86 set was called AMD64 .
x64 means a CPU that is x86 compatible but has a 64-bit mode as well (most often the 64-bit instruction set as introduced by AMD is meant; Intel's idea of a 64-bit mode was totally stupid and luckily Intel admitted that and is now using AMDs variant).
- Right-click on the Start icon on the lower left corner of the screen and click on System. There will be an entry under System called System Type listed. If it lists 32-bit Operating System, than the PC is running the 32-bit (x86) version of Windows.
- If you are using a 64-bit computer, you will download the amd64 version, regardless what brand of CPU you are using. If you are wondering, a 64-bit computer can run the i386 (32-bit) version of Ubuntu as well. It is just that you are not utilizing your computer to the maximum.
- There are three main CPU architectures used in today's Android phones. ARM is perhaps the most common, as it's optimized for battery consumption. ARM64 is an evolution of the original ARM architecture that supports 64-bit processing for more powerful computing, and it's quickly becoming the standard in newer devices.
Updated: 28th November 2019