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Edited by Gil862, Tryme2, Teresa, Antarctica and 12 others

Three Methods:For Windows 7/Vista/Server 2008/R2For Windows XP/2000/Server 2003For Mac OS X

This article explains how to determine whether your computer/server is running a 32-bit or 64-bit version of a MS Windows Operating System.

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EditMethod 1 of 3: For Windows 7/Vista/Server 2008/R2

  1. Check if Your Computer Is 64 Bit Step 1.jpg
    1
    (1) Click on the Start Button: (2) Type 'System' in the Start Search box, and then (3) click "System" in the Programs list.
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  2. Check if Your Computer Is 64 Bit Step 2.jpg
    2
    In the "System" window it will state either "32-bit Operating System" or "64-bit Operating System".

EditMethod 2 of 3: For Windows XP/2000/Server 2003

  1. Check if Your Computer Is 64 Bit Step 3.jpg
    1
    Press the WIN+R keys (Windows key and R). Type the following: sysdm.cpl and click OK.
  2. Check if Your Computer Is 64 Bit Step 4.jpg
    2
    Click on "System Summary": Under "System Type" it will either state "x86" if a 32-bit version of Windows is installed, or "EM64T" if a 64-bit version of Windows is installed.

EditMethod 3 of 3: For Mac OS X

  1. 1
    Launch Terminal app (see Applications/Utilities)
  2. 2
    At prompt, type the following: "uname -a" (without the quotes) (note the blank space between "uname" and "-a" strings.
  3. 3
    The terminal will display two lines of text. At the end of the 2nd line, you'll find something like either
    1. RELEASE_I386 i386 ; the latest "i386" means that you're running 32bits kernel
    2. RELEASE_X86_64 x86_64 ; the latest "x86_64" means that you're running 64bits kernel
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Article Info

Categories: Computers and Electronics

Recent edits by: Sddek, Dave_Santa_Maria, Philippe99

In other languages:

Español: Cómo saber si tu computadora es de 64 bits, Italiano: Come Verificare se l'Architettura del Tuo Computer è a 64 bit, Português: Como Saber se Seu Sistema Operacional é 64 bits

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