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AMD64 (also variously referred to by AMD in their literature and documentation as “AMD 64-bit Technology” and “AMD x86-64 Architecture”) was created as an alternative to the radically different IA-64 architecture designed by Intel and Hewlett-Packard, which was backward-incompatible with IA-32, the 32-bit version of the x86 architecture.
The term 64-bit also describes a generation of computers in which 64-bit processors are the norm. 64 bits is a word size that defines certain classes of computer architecture, buses, memory, and CPUs and, by extension, the software that runs on them. 64-bit CPUs have been used in supercomputers since the 1970s (Cray-1, 1975) and in reduced ...
2.16 64-bit processors: Intel 64 – Sandy Bridge / Ivy Bridge microarchitecture. ... Download QR code; Print/export Download as PDF; Printable version; In other projects
Intel 7, 14 nm, 22 nm, 32 nm, 45 nm, 65 nm 2.9 W – 73 W 1 or 2, 2 /w hyperthreading 800 MHz, 1066 MHz, 2.5GT/s, 5 GT/s 64 KiB per core 2x256 KiB – 2 MiB 0 KiB – 3 MiB Intel Core: Txxxx Lxxxx Uxxxx Yonah: 2006–2008 1.06 GHz – 2.33 GHz Socket M: 65 nm 5.5 W – 49 W 1 or 2 533 MHz, 667 MHz 64 KiB per core 2 MiB N/A Intel Core 2: Uxxxx
IA-64 (Intel Itanium architecture) is the instruction set architecture (ISA) of the discontinued Itanium family of 64-bit Intel microprocessors. The basic ISA specification originated at Hewlett-Packard (HP), and was subsequently implemented by Intel in collaboration with HP. The first Itanium processor, codenamed Merced, was released in 2001.
Intel soon adopted AMD's architectural extensions under the name IA-32e, later using the name EM64T and finally using Intel 64. 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 ...
Itanium (/ aɪ ˈ t eɪ n i ə m /; eye-TAY-nee-əm) is a discontinued family of 64-bit Intel microprocessors that implement the Intel Itanium architecture (formerly called IA-64). The Itanium architecture originated at Hewlett-Packard (HP), and was later jointly developed by HP and Intel.
An x86-64 processor acts identically to an IA-32 processor when running in real mode or protected mode, which are supported modes when the processor is not in long mode.. A bit in the CPUID extended attributes field informs programs in real or protected modes if the processor can go to long mode, which allows a program to detect an x86-64 processor.