How much memory does a 32-bit system support?

32-bit systems theoretically support up to 4G of memory. The maximum addressing space that a 32-bit operating system can support is 2 to the power of 32 bytes, which is 419430400B. When converted into GB, it is exactly equal to 4GB; this also means that a 32-bit operating system The maximum memory capacity can only be read about 4GB.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

When using computers, we often hear such terms: the computer is equipped with 4GB of memory, and the computer system uses Windows 7 32-bit or 64-bit. After using the computer for a period of time, we will feel that our memory is not enough, so we install additional memory modules on the computer to expand the computer's memory size. However, we will find that when the computer is running, its actual memory is still not enough. Change, so what exactly is going on?

The role of memory

Memory is a very important hardware device in the computer One, its main function is to store data and information that is about to be processed or has been processed by the processor. All programs inside the computer run in the memory. The size of the memory determines how well your computer can run at once. No matter how big the program is, its running stability will directly affect the computer's stability and performance. The relationship between memory and the processor is that it is a storage space that the processor can directly read and address.

The relationship between the number of operating system bits and memory

The so-called number of bits of a computer system refers to the operation of the system during operation Word length, which directly determines the maximum addressing space that the system can support. The so-called addressing space refers to the size of the space that the processor can directly read data. In other words, this will fundamentally determine the amount of space it can read. Maximum memory space size. The addressing space is a memory addressing capability described for the processor. In layman's terms, it refers to how much memory the processor can use. The storage relationship of data in the memory is very regular, just like each family will have detailed provinces, cities, streets and house numbers. The computer will find the data it needs to use for its calculations based on such relationships.

How much memory does a 32-bit system support?

##32-bit systems theoretically support up to 4G of memory.

A 32-bit operating system, the maximum addressing space it can support is 2 to the power of 32 bytes, which is 419430400 bytes. When converted into GB, it is exactly equal to 4GB. . This also means that a 32-bit operating system can only read about 4GB of memory capacity at most, and no more will be useless. Similarly, 64-bit systems use the same calculation method, which is why most computer systems are now 64-bit.

Explanation:

• The combination of processor and memory constitutes the core part of the computer. How large a processor can address The space still depends on the operation word length of the system, that is, the number of bits. With the continuous advancement of technology, the functions of future processors and memories will be more powerful. Of course, even now, the functions of computers are already very powerful.

Extended knowledge:

32-bit CPU design for 32-bit operating systems. The bits of the CPU refer to the amount of data that can be processed at one time, 1 byte = 8 bits, a 32-bit processor can process 4 bytes of data at a time, and so on. A 32-bit CPU only has about 4G of memory addressing space. For some servers, 4G of memory is far from enough. If we need a larger memory addressing space, we need to upgrade the CPU. This is how 64-bit CPUs were born. The 64-bit CPU expands the original CPU bus to 64, which makes the CPU's memory addressing range reach 2^64. In fact, only newer 64-bit operating systems support memory spaces larger than 4G, and large memory support will complicate the operating system's memory management program.

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