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This article will explain to you in detail whether ram refers to running memory. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

Ram is running memory, and the English full name of ram is Random Access Memory, which means random access memory. Ram is also an internal memory that exchanges data directly with CPU. RAM can read and write at any time and is very fast. It is usually used as a temporary data storage medium for operating systems or other running programs.

Running memory, also known as main memory, refers to the memory needed when the program is running, which can only temporarily store data for exchanging cache data with CPU, generally referring to random access memory (Random Access Memory,RAM).

Random access memory

A memory in which data can be quickly written and read by memory cells anywhere in a storage array in random order. It is a place where computers store operating systems, applications, and user data. Unlike hard drives or other storage devices, it enables processors to get data more quickly, but all data stored in RAM will be lost after shutdown. When the user boots again, the computer will automatically load the operating system and other files (usually from the hard drive) into RAM again. RAM is similar to short-term memory and hard disk is similar to long-term memory. Short-term memory can store a lot of data at the same time for the current job. Long-term memory can be short-term and needs to be refreshed. It has the following characteristics:

Random access

The so-called "random access" means that when a message in memory is read or written, the time required is independent of the location of the information. In contrast, a serial access memory includes a sequential access memory (such as magnetic tape) and a direct access memory (such as a disk).

Volatility

RAM cannot retain data when the power is off. If you need to save data, you must write it to a long-term storage device (such as a hard disk). The biggest difference between RAM and ROM is that the data stored in RAM automatically disappears after a power outage, while ROM does not.

High access speed

Modern random access memory has the fastest write and read speed among almost all access devices, and the access delay is negligible compared with other storage devices involved in mechanical operation, such as hard disk and optical disc drive. However, the speed is still not as fast as the SRAM used as CPU cache.

Modern random access memories rely on capacitors to store data. When the capacitor is fully charged, it represents 1 (binary), and the uncharged represents 0. As the capacitor has more or less leakage, if it is not treated specially, the charge will gradually lose over time and the data will be wrong. Refresh refers to recharging the capacitor to make up for the lost charge. The reading of DRAM has the effect of refreshing, but the general regular refresh does not need to make a complete read, only need to make a Row selection of the chip, the whole column of data can be refreshed, and at the same time, all related memory chips can make the same column selection at the same time, therefore, all memory refreshes can be completed one by one in a period of time. The need for refresh explains the volatility of random access memory.

Sensitive to static electricity

Like other fine integrated circuits, random access memory is very sensitive to the electrostatic charge of the environment. Static electricity will interfere with the charge of the capacitor in the memory, cause data loss, and even burn out the circuit. Therefore, you should touch the metal ground with your hands before touching the random access memory.

RAM can be divided into two categories: main memory, which is used to save data needed by various processors, which can speed up the operation speed of the computer; video memory, which is used to save graphic information to be displayed on the display, which can greatly speed up the display speed. Main memory can be divided into SRAM and DRAM. SRAM is a kind of expensive memory, and it takes up a lot of physical space, so it is difficult to integrate, but because it does not need to be refreshed, the access speed is fast. SRAM is usually used for primary and secondary caching. Because DRAM uses capacitors, its contents must be refreshed at regular intervals, otherwise the internal data will be lost. For DRAM, each read is actually a discharge, and the capacitor must be charged to ensure the validity of its contents. Even if it is not read, it needs to be refreshed every 15 milliseconds, and its price is the cheapest in RAM.

This is the end of the article on "ram means running memory". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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