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1. #Windows 7 x64 vs x86 difference install
2. #Windows 7 x64 vs x86 difference 32 bit
3. #Windows 7 x64 vs x86 difference code

#Windows 7 x64 vs x86 difference code

Well written code for a 32-bit system should compile and run on a 64-bit system but not all code is well written. Assuming your C file is myfile.c try gcc -S myfile.c on both systems and compare myfile.s You can prove this by compiling to assembly code on the two systems. Though there is no guarantee that 64-bit code will run faster if the code has not been written to take advantage of the extra features of the processor.Ĭompiling on a 32-bit system will produce different code than a 64-bit system. The cores in modern PCs are capable of behaving as either a 64-bit or a 32-bit processor depending on which version of the operating system you have installed.Ħ4-bit code tends to run faster than 32-bit code either because it can deal with bigger numbers in on go or because the 64-bit cores have more registers so can store more things without needing to put things in external memory. This is the width (in bits) of registers available in the core.īasically the largest number that a 32-bit CPU core can handle in one go is a little over 4.29 billion while a 64-bit core can handle a number of a bit over 18.44 billion, billion. The difference between amd64 and i386 is that amd64 is 64-bit while i386 is 32-bit.

#Windows 7 x64 vs x86 difference 32 bit

Regardless, the world has shifted from 32 bit and it's only there to support older machines that are incapable of running 64 bit. For Linux, however, there's no such limit (thanks, Uri). You'd need to use a 64-bit OS in order to fully use all RAM. In the Windows world, a 32-bit OS will not let you use more than 3.5 Gigs of RAM on your computer (even if you have 8!). For the most part you will not notice a difference but for large workloads (such as video editing, gaming, etc), the computer will perform faster (the computer has the ability to calculate 2+2+2=6 instead of having to do 2+2=4+2=6 in an example).

#Windows 7 x64 vs x86 difference install

x86-64 is still used by many in the industry as a vendor-neutral term, while others, notably Sun Microsystems (now Oracle Corporation) and Microsoft, use 圆4.Įven if you have an intel CPU, you should use AMD64 to install 64-bit on your computer (it uses the same instruction sets). After launching the architecture under the "x86-64" name, AMD renamed it AMD64. It supports vastly larger virtual and physical address spaces than are possible on x86, thereby allowing programmers to conveniently work with much larger data sets. X86-64 is an extension of the x86 instruction set. This is termed x86, IA-32, or the i386-architecture, depending on context. The Intel 80386, also known as the i386, or just 386, was a 32-bit microprocessor introduced by Intel in 1985. I386 refers to the 32-bit edition and amd64 (or x86_64) refers to the 64-bit edition for Intel and AMD processors.