Microsoft claims this limit will be increased as hardware capabilities improve. Windows XP 圆4 can support much more memory although the theoretical memory limit a 64-bit computer can address is about 16 exbibytes (16 billion Gibabytes), Windows XP 圆4 is currently limited to 128 GB of physical memory and 16 TiB of virtual memory.
Using the /3GB switch in the boot.ini file forces Windows to limit the kernel to the upper 1GB and provides up to 3GB for applications. Windows XP 32-bit is limited to a total of 4 GB, which is, by default, equally divided between Kernel and application usage. The primary benefit of moving to 64-bit is the increase in the maximum allocatable system memory (RAM). It is designed to use the expanded 64-bit memory address space provided by the x86-64 architecture. 1830 of core files, the same version used by Windows XP 64-bit Edition 2003 and Windows Server 2003 SP1 as they were the latest versions during the operating system’s development.
Windows XP Professional 圆4 Edition uses version. Microsoft Windows XP Professional 圆4 Edition released on Apby Microsoft is a variation of the Windows XP operating system for x86-64 personal computers.