AMD64


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AMD64

The branding of AMD's 64-bit CPUs. AMD was first to add 64-bit capability to the x86 architecture, with the introduction of the Opteron in 2003. Subsequent AMD64 lines include the Athlon and Phenom models for desktop computers and the low-power Turion line for laptops. Following AMD, Intel later added its own 64-bit architecture to the x86 family (see x64).

Direct Connect Architecture
The AMD64 design, known as the Direct Connect Architecture (DCA), includes a set of 64-bit instructions as well as 64-bit registers that allows the CPU to address more than 4GB of memory, which is the limit of 32-bit registers. It also added a DDR memory controller directly on the CPU chip for increased performance. See Opteron, Athlon, Sempron, Turion and AMD64 sockets.
References in periodicals archive ?
With the availability of Windows Server 2003 x64 editions and Windows XP Professional x64 Edition, customers now have a mainstream, industry-standard 64-bit operating system optimized to take advantage of the performance and efficiency improvements of AMD64 dual-core technology," said Brian Valentine, senior vice president, Windows Core Operating System Division, Microsoft Corp.
As digital photography continues to stretch the limits of 32-bit computing, AMD64 technology enables The Panorama Factory to create larger panoramas with more pictures than what is possible on a 32-bit architecture.
IBM DB2 Universal Database was the first to demonstrate support for the AMD64 platform on Linux," said Bob Picciano, vice president, database technology, Toronto Software Laboratory, IBM.
Only AMD64 technology addresses the need for virus protection in x86 processors by providing the capability for a more secure environment with Enhanced Virus Protection when enabled by the upcoming Microsoft Windows XP SP2.
With our Direct Connected Processor architecture and AMD64 technology and the superior I/O of the AMD Opteron processor, we have been able to directly link a larger number of processors at memory speed, reducing memory and interconnect bottlenecks and significantly increasing application performance.