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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 AMD64 extensions from AMD (originally called x86-64) added a further eight registers XMM8 through XMM15, and this extension is duplicated in the Intel 64 architecture. There is also a new 32-bit control/status register, MXCSR. The registers XMM8 through XMM15 are accessible only in 64-bit operating mode.
AMD K6-2 – an improved K6 with the addition of the 3DNow! SIMD instructions. AMD K6-III Sharptooth – a further improved K6 with three levels of cache – 64 KB L1, 256 KB full-speed on-die L2, and a variable (up to 2 MB) L3. AMD K7 Athlon – microarchitecture of the AMD Athlon classic and Athlon XP microprocessors. Was a very advanced ...
AMD64, ccNUMA + SSE2 + PowerNow! + AMD64 + NX Bit. 200 800 90 Venus 100 1600–3000 Socket 939: Troy 200 Socket 940: Athens 800 Denmark 100 2 1600–3200 1000 HT Socket 939: AMD64, NX Bit: Italy 200 1600–3200 Socket 940: AMD64, NX Bit, ccNUMA: Egypt 800 1600–3200 Santa Ana 1200 1800–3200 Socket AM2: DDR2: AMD64, NX Bit: Santa Rosa 2200 ...
AMD Technical Documentation; AMD Processors for Desktops: AMD Phenom, AMD Athlon FX, AMD Athlon X2 Dual-Core, AMD Athlon, and AMD Sempron Processor; sandpile.org – AA-64 implementation – AMD K8; AMD 64 OPN reference guide – Fab51; Socket AM2 CPUs listed, specced, priced up – The Inquirer; Chip identification by model number
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.
x86 virtualization is the use of hardware-assisted virtualization capabilities on an x86/x86-64 CPU.. In the late 1990s x86 virtualization was achieved by complex software techniques, necessary to compensate for the processor's lack of hardware-assisted virtualization capabilities while attaining reasonable performance.
With AMD's introduction of a 64-bit architecture backwards-compatible with x86, x86-64 (also called AMD64), in September 2003, followed by Intel's near fully compatible 64-bit extensions (first called IA-32e or EM64T, later renamed Intel 64), the 64-bit desktop era began. Both versions can run 32-bit legacy applications without any performance ...