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This article mainly shows you what the physical memory in the computer refers to, which is easy to understand and clear. I hope it can help you solve your doubts. Let's take you to study and learn the article "what does physical memory in a computer refer to?"

Physical memory is relative to virtual memory; physical memory refers to the memory space obtained through physical memory strips, while virtual memory refers to dividing an area of the hard disk as memory. Common physical memory specifications are 256m, 512m, 1G, 2G, etc. When physical memory is insufficient, virtual memory can be used instead.

Physical memory (Physical memory) is relative to virtual memory. Physical memory refers to the memory space obtained through physical memory bars, while virtual memory refers to the division of an area of the hard disk as memory. The main function of memory is to provide temporary storage for the operating system and various programs while the computer is running. The common physical memory specifications are 256m, 512m, 1G, 2G and so on. Nowadays, with the development of computer hardware, 4G, 8G and even higher memory specifications have emerged. When physical memory is insufficient, virtual memory can be used instead. In the application, naturally, as the name implies, physically, the real size of the memory stick inserted on the memory slot on the motherboard. When you look at the computer configuration, you mainly look at this physical memory.

Physical memory is one of the most important resources on a computer. Windows's memory manager is responsible for allocating memory to active processes, device drivers, and the operating system itself. Because most systems can access far more data and code than physical memory, physical memory is essentially the window in which code and data run. So memory capacity has an impact on performance, because if the code or data required by the process or operating system does not exist, the memory manager needs to read it from disk.

Description in CPU

Physical memory, the amount of memory space that can be addressed directly by the address line of CPU. For example, 8086 has only 20 address lines, then its address space is 1MB. Let's just say that 8086 can support 1MB's physical memory. Even if we install 128m of memory on the board, we can only say that 8086 has the physical memory space of 1MB. Similarly, a 32-bit CPU of more than 386 can support the maximum physical memory space of 4GB.

The difference between virtual memory and physical memory: virtual memory is the opposite of physical memory, which refers to the memory space virtual allocated from the hard disk according to the needs of the system. It is a kind of computer system memory management technology, which belongs to computer programs. Physical memory is hardware. Because sometimes when you are dealing with large programs when the system memory is not enough, the hard disk will be used as memory to exchange data as a cache area, but the processing speed of physical memory is more than 30 times that of virtual memory.

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