What is differrence between 32-bit and 64-bit version of Windows?

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.

As the number of bits increases there are two important benefits.
  • More bits means that data can be processed in larger chunks which also means more accurately.
  • More bits means our system can point to or address a larger number of locations in physical memory.

32-bit systems were once desired because they could address 4 GB (Gigabytes) of memory in one go. Some modern applications require more than 4 GB of memory to complete their tasks so 64-bit systems are now becoming more attractive because they can potentially address up to 4 billion times that many locations.

Since 1995, when Windows 95 was introduced with support for 32-bit applications, most of the software and operating system code has been 32-bit compatible. Most of the software available today is 32-bit, the processors we buy are almost all 64-bit.

To find out if your computer is running 32-bit or 64-bit Windows, do the following:

  1. Go to the Start button
  2. Then click Control Panel, clicking System and Maintenance, and then clicking System.
  3. Under System, you can view the system type.

To find out whether your computer capable 6-bit processor:

To run a 64-bit version of Windows, your computer must have a 64-bit-capable processor. To find out if your processor is 64-bit-capable, do the following:
  1. Go to the Start button , click Control Panel,
  2. Then click System and Maintenance, and then click Performance Information and Tools.
  3. Click View and print details.
  4. In the System section, you can see what type of operating system you're currently running under System type. Under 64-bit capable, you can see whether you can run a 64-bit version of Windows. (If your computer is already running a 64-bit version of Windows, you won't see the 64-bit capable listing.)

Note: You can't upgrade from a 32-bit version of Windows to a 64-bit version of Windows.

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