Proper noun
x86-64
(computing) A superset of the x86 instruction set architecture, providing additional support for 64-bit addressing while remaining mostly backward compatible with older applications.
Comparison to x86-64 SSE Both VMX/AltiVec and SSE feature 128-bit vector registers that can represent sixteen 8-bit signed or unsigned chars, eight 16-bit signed or unsigned shorts, four 32-bit ints or four 32-bit floating point variables. Source: Internet
It features parallel commands (bash, copying tools), deployment (disks), software upgrade/downgrade (urpmi parallel), monitoring (ganglia), etc. Clustering was available on x86 and x86-64 architectures. Source: Internet
CISC ISAs like x86-64 offer low register pressure despite the fact that they have fewer programmable registers. Source: Internet
It is designed to use the expanded 64-bit memory address space provided by the x86-64 architecture. citation Windows XP Professional x64 Edition is based on the Windows Server 2003 codebase; with the server features removed and client features added. Source: Internet
However, starting with Slackware 13.0 a 64-bit x86-64 variant is available and officially supported in symmetrical development with the 32-bit platform. Source: Internet
In 1999, AMD published a (nearly) complete specification for a 64-bit extension of the x86 architecture which they called x86-64 with claimed intentions to produce. Source: Internet