The steps to determine whether your computer has a 32-bit or 64-bit CPU (central processing unit) depend on the operating system installed. Below are the steps to determine the processor type for Windows, Mac, and Linux.
Windows 8, 10, and 11
See the following steps to determine your CPU type and how many bits the processor has in Windows 8, Windows 10, and Windows 11.
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- Type system information in the Windows search box and select the System Information icon.
Or, if you do not have a search box (because you have disabled it):
- Open a File Explorer window by pressing Windows key+E.
- On the left, right-click This PC.
- In the context menu, select Properties to open the System Properties window.
- In the System Properties window, find your System type, which lists your operating system and CPU type.
Earlier versions of Windows
With earlier versions of Windows, follow these steps.
- Open the Start menu > All Programs. Open the Accessories folder, then the System Tools folder. In the System Tools folder, select the System Information option.
- Look for the System Type option under the Item column on the right side of System Information. In the Value column, the associated value tells you which type of CPU the computer has in it. If the System Type value includes “x86” in it, the CPU is 32-bit. If the System Type value includes “x64” in it, the CPU is 64-bit.
Determine if using 32-bit or 64-bit version of Windows
Microsoft Windows is available in 64-bit and 32-bit. 32-bit processors can only run 32-bit versions of Windows. However, 64-bit processors can run either the 64-bit or 32-bit versions.
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To determine if the version of Windows on your computer is 32-bit or 64-bit, choose your version and follow the steps.
Determine if Windows Vista and later is 32-bit or 64-bit
- Press Windows key+Pause or open the System icon in the Control Panel.
- The System window, next to System type, lists 32-bit Operating System for a 32-bit version of Windows and 64-bit Operating System if you’re running the 64-bit version. Below is a picture and an example of this window.
Determine if Windows XP is 32-bit or 64-bit
- Press Windows key+Pause or open the System icon in the Control Panel.
- On the General tab of the System Properties window, if it has the text Windows XP, the computer runs the 32-bit version of Windows XP. If it has the text Windows XP Professional x64 Edition, the computer runs the 64-bit version of Windows XP.
Determine if Windows 2000 and prior is 32-bit or 64-bit
Windows operating systems, from Windows 95 to Windows 2000, are all 32-bit. There are no 64-bit versions of these operating systems.
Apple macOS
On a computer running macOS, follow these steps to determine if the processor is 32-bit or 64-bit.
- Click the Apple icon in the menu bar in the upper-left corner.
- Select the About This Mac option in the Apple menu.
- In the system information window that opens, next to Processor, the processor’s speed and make is displayed.
- Once you know the make and model of the processor, compare it to the table below to find out your CPU’s architecture. If you don’t see your chip listed, perform an Internet search to determine if it’s 32-bit or 64-bit.
Processor 32-bit or 64-bit Intel Core Duo or Solo 32-bit Intel Core 2 Duo 64-bit Any Intel Xeon processor 64-bit Intel Core i3 64-bit Intel Core i5 64-bit Intel Core i7 64-bit
The table above shows that all the most recent Mac computers are 64-bit processors.
Linux
Access the command line interface on the Linux operating system, and enter the following command.
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grep flags /proc/cpuinfo
Look for “lm” in the command output. If lm is found in the output, then the CPU is 64-bit. If you don’t see lm or see i386, i486, i586, or i686 in the output, then the CPU is 32-bit. Below is an example output of the command above with lm in the information.
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl est tm2 ssse3 cx16 xtpr sse4_1 lahf_lm
Determine if the Linux kernel is 32-bit or 64-bit
Using the uname command, determine if your Linux kernel is 32-bit or 64-bit by running the command below.
uname -a
The command above displays an output similar to the example output below.
SMP Tue Feb 12 00:15:43 EST 2008 x86_64 x86_64 GNU/Linux
If you see x86_64 in the output, it is x86 and 64-bit.
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