32-bit and 64 bit computers

Number of digits of computer ：

The number of digits of a computer generally refers to the number of digits of the operating system ,32 Bit operating system can address 2 Of 32 Memory range to the power of bytes ,64 Bit operating systems are addressable 2 Of 64 Memory range to the power of bytes . be relative to 32 For a computer ,64 In theory, the data processing ability of bit computer is stronger , Faster .

32 Bit refers to the computer CPU The maximum amount of data processed at one time , It can be understood as having 32 Root address line , And in the computer Usually by 0\1 To express information 、 Binary storage information , There will be such a situation .

Memory will be divided into memory units , Each memory unit has Number , And the size of a memory unit
It's one byte （1 individual byte） Get... By unit conversion ：2^32 Bytes to 4GB. Empathy ,64 Bit computer is 8GB

  difference ：

1.64 The original intention of bit operating system is to meet the requirements of mechanical design and analysis 、 three-dimensional animation 、 Video editing and creation , And customers who need a lot of memory and floating-point performance in areas such as scientific computing and high-performance computing applications , and 32 Bit system , I didn't think too much at the beginning .

2.32 Bit system , Maximum support only 3.5GB Memory , If in 32 Bit system , It uses 4GB Or more memory , The computer can only recognize 3.4GB You can use .

and 64 The bit system can support up to 128GB Large memory . install 64 Bit system , need CPU Must support 64 position , and 64 position CPU GPRs The data width of is 64 position ,64 Bit instruction set can run 64 Bit data instruction , That is, the processor can extract 64 Bit data ( Just two instructions , One time extraction 8 Bytes of data ), Than 32 position ( Four instructions are required , One time extraction 4 Bytes of data ) It's doubled , In theory, the performance will be doubled accordingly .

repair ：

1、 Different data processing capabilities ：32 Bit is 32bit That is, it can be handled at one time 4 Bytes of data ;64 Bit is 64bit That is, it can be handled at one time 8 Bytes ;

　　2、 The upper limit of memory capacity support is different ：32 Bit operating system supports up to 4GB Of memory , Essence is 3.25GB; and 64 The bit system can theoretically support unlimited memory , As long as there are corresponding products and enough memory sockets ;

　　3、 The software runs in different versions ：64 Bit system can be compatible with 32 Bit software , but 32 Bit is not upward compatible ;