What do IA-32, Intel® 64 and IA-64 Architecture mean?

Intel® compilers and libraries support three platforms: general combinations of processor architecture and operating system type. This section explains the terms that Intel uses to describe the platforms in its documentation, installation procedures and support site.

IA-32 Architecture refers to systems based on 32-bit processors generally compatible with the Intel Pentium® II processor, (for example, Intel® Pentium® 4 processor or Intel® Xeon® processor), or processors from other manufacturers supporting the same instruction set, running a 32-bit operating system.

Intel® 64 Architecture refers to systems based on IA-32 architecture processors which have 64-bit architectural extensions, for example, Intel® CoreTM2 processor family), running a 64-bit operating system such as Microsoft Windows XP* Professional x64 Edition or Microsoft Windows Vista* x64. If the system is running a 32-bit version of the Windows operating system, then IA-32 architecture applies instead. Systems based on AMD* processors running a 64-bit version of Windows are also supported by Intel compilers for Intel® 64 architecture applications.

IA-64 Architecture refers to systems based on the Intel® Itanium® processor running a 64-bit operating system.

 

For more complete information about compiler optimizations, see our Optimization Notice.

3 comments

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Ying H. (Intel)'s picture

It is informative! Thanks you. A similiar discussion about OS+hardware+ compiler+ application is in http://software.intel.com/en-us/forums/showthread.php?t=105918

Thanks
Ying

anonymous's picture

I have the processor named.........Intel® Pentium® D Processor 820
(2M Cache, 2.80 GHz, 800 MHz FSB)

Instruction set: 64 bit
PAE: 32 bit
Intel® 64 enabled

Sir i'm confused whether i can install windows 7 64 bit on my pc..........is my pc compatible with 64 bit....I have installed 2gb ram & 1gb graphics card..................PLEASE HELP ME...........THANK U.

Wendy Doerner (Intel)'s picture

T2450 is an IA-32 architecture. For more information about specific processors you can search here to get the details:

http://ark.intel.com/

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