The 32-bit version can become the default Windows Shell. Windows XP x64 Edition also includes both 32-bit and 64-bit versions of Internet Explorer 6, so that user can still use browser extensions or ActiveX controls that are not available in 64-bit versions.
What is the maximum RAM Windows XP can use?
32 bit Windows XP has two well-known memory limits. Each process is limited to 2GB of memory (or 3GB if you change a setting). The maximum memory that Windows XP will use in total is 3.25GB. There is no fundamental 4GB limit for memory in 32 bit operating systems - Windows Server 2003 can use more than 4GB.
Is Windows XP Professional Service Pack 3 32 bit or 64 bit?
Click the General tab. The operating system is displayed as follows: For a 64-bit version operating system, Windows XP Professional x64 Edition Version < Year> appears under System. For a 32-bit version operating system, Windows XP Professional Version <Year> appears under System.