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In computing, IA-64 (Intel Architecture-64) is a 64-bit processor architecture developed in cooperation by Intel and Hewlett-Packard, implemented by processors such as Itanium and Itanium 2.Code: Select all
AMD64 (also x86-64 or x64) is a 64-bit microprocessor architecture and corresponding instruction set designed by Advanced Micro Devices. It is a superset of the x86 architecture, which it natively supports. The AMD64 instruction set is currently implemented in AMD's Athlon 64, Athlon 64 FX, Athlon 64 X2, Turion 64, Opteron and later Sempron processors. In an ironic twist of computing history, it has been adopted (under the name EM64T) by Intel—the original creators of the x86 processor line—in its newer Pentium 4, Pentium D, Pentium Extreme Edition, Celeron D, and Xeon processors.