• The 64-bit version of Windows XP is one in a family of 64-bit Windows operating systems, stretching back to 2001. The 64-bit version of Windows XP may look and act like its 32-bit counterpart on the surface, but, beneath the surface, it is equipped with important features that deliver faster use and improved functionality to the savvy computer user.
  
  

Microprocessor Capability

• The 64-bit version of Windows XP, as well as the 64-bit version of all Windows versions, is designed to take full advantage of the 64-bit processing capabilities of newer and higher-end microprocessors. Users with 64-bit processors opting not to choose a 64-bit operating system are not getting their money's worth from their computer hardware.
  
  

Memory Usage

• 64-bit Windows XP is designed to use larger amounts of random access memory (RAM) than its 32-bit counterpart. 32-bit Windows XP can only utilize up to 4 gigabytes (GB) of RAM, while 64-bit Windows XP can handle any realistic amount of RAM you may choose to put in your system. This means that programs load faster and run more smoothly.
  
  

Program Functionality

• With better data handling, 64-bit Windows XP will, on the whole, run programs faster than they would run in 32-bit Windows XP. Furthermore, your computer will be better able to run multiple programs at once, without suffering the significant slowdown that a 32-bit system may experience.
  
  

Upgrading Power

• Because 64-bit Windows XP is less limited than its 32-bit counterpart, it is better able to take advantage of new system hardware and software upgrades, especially those that introduce processor-heavy functions or require the installation of more RAM.