What does a 32-bit operating system mean?

Q: How to look at the number of digits in the CPU.

A: The use of such software such as Everest, Lu master and so on can be detected, the following screenshot of my computer to analyze:

The above indicates that both 32-bit system and 64-bit system are supported;

Q: What we mean by the 32-bit operating system is 32 bits.

A: Refers to the CPU is 32 bits, the CPU is responsible for (1) calculation (refers to the number of bits can be processed at one time is 32 bits) and (2) instruction control (instruction number of 32 bits);


The biggest difference between a 64-bit CPU and a 32-bit CPU is the addition of a 64-bit register, which has two functions:

(1) store data and calculate : 32-bit CPU can handle at one time the number of data is 32 bits, for example, if there are two 48 digits added, the first calculation of the lower 32 digits, and then calculate a high 16 bit, if the 64-bit CPU, you can calculate directly, So that's why the 64-bit CPU is faster (computational speed);

(2) indirection : 32-bit CPUs can support 4GB of memory addressing, while 64-bit CPUs can support 16777216TB memory addressing;

Addressing is simply the maximum range of addresses to look for data, so if there is too much data to go beyond the addressable range that 32-bit CPUs can support, the CPU will not be able to find it.

So if your CPU is 32 bits, it is useless to install more than 4G of memory on the computer;

64-bit cpu+64 bit of operating system + 64-bit software can play a 64-bit role.

The bit width of CPU is the bit width of data bus, that is, how many bits are processed at a time;

Q: What does 32-bit software mean.

A: Whether the operating system is 32-bit or 64-bit, he will be used as a 32-bit CPU, that will only handle the data width of 32 bits;

Q: The greater the memory performance the better.

A: No, if the CPU is 32 bits, you can only use up to 4GB of memory, and then large waste;

Q: Is it possible to run 32-bit software on a 64-bit operating system?

Answer: No. Some software is incompatible;