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【转】IA-64不是一般的64bit程序

https://www.quora.com/Can-you-run-Windows-7-64-bit-x64-on-an-Itanium-computer

这几天看程序发现这个问题,就仔细搜了下,平时我们遇不到这种问题(即使理解错了也对程序运行无关精要。。。),但是我们还是应该多了解一些吧。

Can you run Windows 7 64-bit (x64) on an Itanium computer?

Phillip Remaker, using Windows since version 1.0

No.

Windows 7 64-bit is designed for the x86-64 (sometimes called amd64 or x64) architecture.  The Itanium is IA-64 architecture.  While they are both “64 bit,” they are as different as night and day.

“64  bit” is just the bus width of the data and address bus of the CPU. By itself, a “64 bit CPU” tells you nothing about what’s  inside the CPU.  The Intel x86 is the most common 64 bit processor for  home computers, so most people will say “64 bit CPU” when they really  mean “Intel x86-64 CPU.”  The Intel Itanium is a toally different CPU  with a totally different set of instructions than the x86-64.