Windows system 32-bit and 64-bit difference

Simply say x86 stands for 32-bit operating system
x64 stands for 64-bit operating system
. If your CPU is dual-core or above, it definitely supports 64-bit operating system
. If your computer
memory is larger than 4G, then you should use a 64-bit system, because 32-bit Windows
7, Vista, and only support 3.25G. RAM. The 64-bit windows7 will support up to 128G of memory. Having said that, do you want to know the difference between 32-bit and 64-bit?

64bit computing has two main advantages: it can perform a larger range of integer operations; it can support larger memory.

You can't simply think that the performance of a 64bit processor is twice that of a 32bit processor because of the digital changes. In fact, in 32-bit applications, the performance of 32-bit processors will be even stronger. Even 64-bit processors are currently more powerful in 32-bit applications. So be aware of the advantages of 64bit processors, but not superb 64bit.

Memory This is the most significant advantage of a 64-bit system, which can use more than 4GB of memory. Most new desktops and laptops have at least 4GB of memory. The problem is that 32-bit versions like Vista and Win7 can only use about 3GB of memory. In contrast, 64-bit Windows can not only take up to 192GB of memory, but also use the memory map to replace the BIOS, so that the operating system really uses the full 4GB. Therefore, if you install Win7x64, you will not waste 1GB of memory on machines with 4GB of RAM.

Personally believe that 3GB is not enough for everyday use is just a matter of time. An example is the Win7 XP mode feature, which allows you to run an old application on a virtual machine in Windows XP. This feature can be used for a variety of purposes, such as running Office2007 and Office 2003 on the same computer at the same time, or IE (useful for WEB development). But WinXP mode requires at least 512MB ~ 1GB of memory to run properly, so XP mode is very memory. So if you deploy Windows 732 now, you might want to move to 64 bit soon, just because you have to upgrade your machine with new memory. My own laptop has 8GB of memory, because the programs I develop can run in every virtual machine environment. I don't want to waste every byte in memory.

64-bit really provides better performance?

I guess many people think that 64-bit processors are faster than 32-bit processors. Because of the fact that the transition from 8-bit to 16-bit, the transition from 16-bit to 32-bit does bring some performance gains. For the above reasons, can you think that a 64-bit processor can be faster?

With such an example, many 32-bit processors support the S*** instruction set, but most programmers will not use them at all, as this will prevent computers that do not support these instruction sets from running them. The program (egSSE2 can make Zip compression faster, but the most commonly used 3 compression software does not use it).

So, only 64-bit programs with 64-bit optimization will have performance improvements. Unfortunately most Windows applications don't do this optimization.

However, in the last year, a lot of 64-bit applications have been created, but don't mistakenly think that they will be faster than the 32-bit version. Because usually, this 64-bit version is produced only because the 32-bit version does not work properly on 64-bit Windows operating systems. But some 64-bit performance-dependent programs, such as mathematics (egMathlab) and various video processing software, or software developers explicitly support 64-bit (eg7zip), then the speed may be significantly different than the 32-bit version .

On the other hand, win64 does not slow down your computer's performance. Although programs like the CLR (.net underlying) perform some calculations to enable 32-bit programs to run on 64-bit systems, it takes a lot of time logically. However, in practice you will not know the difference. Almost all performance tests can prove that in most cases you don't care about the performance difference between 64-bit and 32-bit.

The above is about the difference between 32-bit and 64. It can be seen from this article that better CPU performance is not the reason for upgrading to 64-bit. But there is no doubt that this phenomenon is likely to change soon, and the future belongs to 64-bit. More and more software vendors will offer 64-bit versions of the program over time.