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The Windows NT kernel powers all recent Windows operating systems. It has run on IA-32 , x64 , DEC Alpha , MIPS architecture , PowerPC , Itanium , ARMv7 , and ARM64 processors, but currently supported versions run on IA-32 , x64 , ARMv7 , and ARM64 .
Windows XP Professional x64 Edition; 3790 x86-64: Windows Vista: Longhorn [3] January 30, 2007 NT 6.0 Windows Vista Starter; Windows Vista Home Basic; Windows Vista Home Premium; Windows Vista Business; Windows Vista Enterprise; Windows Vista Ultimate; 6002 [c] IA-32, x86-64: April 11, 2017 Windows 7: Windows 7 [4] October 22, 2009 NT 6.1 ...
Because 64-bit drivers for most devices were unavailable until early 2007 (Vista x64), using a 64-bit version of Windows was considered a challenge. However, the trend has since moved toward 64-bit computing, more so as memory prices dropped and the use of more than 4 GB of RAM increased.
x86-64 (also known as x64, x86_64, AMD64, and Intel 64) [note 1] is a 64-bit extension of the x86 instruction set architecture first announced in 1999. It introduces two new operating modes: 64-bit mode and compatibility mode, along with a new four-level paging mechanism.
Microsoft and Sun Microsystems/Oracle also use term "x64", while many Linux distributions, and the BSDs also use the "amd64" term. Microsoft Windows, for example, designates its 32-bit versions as "x86" and 64-bit versions as "x64", while installation files of 64-bit Windows versions are required to be placed into a directory called "AMD64". [20]
On April 25, 2005, Microsoft released Windows XP Professional x64 Edition and Windows Server 2003, x64 Editions in Standard, Enterprise and Datacenter SKUs. Windows XP Professional x64 Edition is an edition of Windows XP for x86-64 personal computers. It is designed to use the expanded 64-bit memory address space provided by the x86–64 ...
On April 25, 2005, Microsoft released Windows XP Professional x64 Edition and Windows Server 2003 x64 editions to support x86-64 (or simply x64), the 64-bit version of x86 architecture. Windows Vista was the first client version of Windows NT to be released simultaneously in IA-32 and x64 editions. As of 2024, x64 is still supported.
Windows 11 only supports 64-bit systems such as those using an x86-64 or ARM64 processor; IA-32 and ARM32 processors are no longer supported. [129] Thus, Windows 11 is the first consumer version of Windows not to support 32-bit processors (although Windows Server 2008 R2 is the first version of Windows Server to not support them).