The main benefit of Windows XP Professional x64 Edition is the increase in the maximum allocatable system memory. Windows XP 32-bit is limited to a total of 4 GB, which is equally divided between applications and kernel. Windows XP Professional x64 Edition can support much more memory up to a current level of 128 GB, but this limitation could go even higher. This version of Windows will support large databases of information, will enhance productivity for those who use their systems for videos and other types of applications, that require large blocks of memory.

And Windows Vista will also be offered in a 64-bit version.

Side note: In order to take advantage of the 64-bit version, your CPU must support 64-bit. Both AMD and Intel offer 64-bit CPUs.

“More memory, improved performance

The expanding data and performance needs of business, academic, engineering, and scientific organizations have pushed the limits and capabilities of existing information technology (IT) platforms. Millions of people worldwide need to access gigabytes or even terabytes of data in real time. The increasingly sophisticated demands for making home movies, working with digital photographs, using digital media, and playing 3-D games is also stretching the capabilities of existing 32-bit PCs.

Advances in processor technology that extend the capabilities of x86 architecture have brought the power of 64-bit computing to you. Now, you can use a 64-bit operating system to seamlessly run 32-bit and cutting-edge 64-bit applications. Windows XP Professional x64 Edition takes full advantage of this new architecture.” [Source: Microsoft]

[tags]Windows, XP, 64 bit, memory, performance, operating, system, application, power[/tags]