What is the memory capacity in the performance indicators of microcomputer?

Memory capacity refers to the "capacity of RAM". The memory capacity of a computer usually refers to the capacity of random access memory (RAM), which is a key parameter of the memory stick. The memory capacity is generally a multiple of 2, such as 64MB, 128MB, 256MB, etc. Generally speaking, the larger the memory capacity, the better it is for the operation of the system.

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

The memory capacity in the performance indicators of microcomputers refers to the "capacity of RAM".

The memory capacity of a computer usually refers to the capacity of random access memory (RAM), which is a key parameter of the memory stick.

Memory includes RAM and ROM. Memory capacity refers to the capacity of the memory stick RAM. Currently, the commonly used memory sticks on the market include SDRAM and DDR, with capacities of 128M, 256M, 512M, and some even reach 1G. Cache is between the CPU and memory to coordinate and match the speed of the two.

The memory capacity is generally a multiple of 2, such as 64MB, 128MB, 256MB, etc. Generally speaking, the larger the memory capacity, the better it is for the operation of the system. In the early 21st century, the mainstream memory capacity used in desktop computers is 2GB or 4GB, and 512MB and 256MB memory are rarely used. The system recognizes memory in Byte (byte) as the unit, and each byte is composed of 8-bit binary numbers, that is, 8bit (bit, also called "bit"). According to the computer's binary format, 1Byte=8bit; 1KB=1024Byte; 1MB=1024KB; 1GB=1024MB; 1TB=1024GB.

1KB=1024B=1024字节
1MB=1024KB=1,048,576字节
1GB=1024MB=1,073,741,824字节
1TB=1024GB=1,099,511,627,776字节
1PB=1024TB=1,125,899,906,842,624字节
1EB=1024PB=1,152,921,504,606,846,976字节
1ZB=1024EB=1,180,591,620,717,411,303,424字节
1YB=1024ZB=1,208,925,819,614,629,174,706,176字节

The amount of memory in the system is equal to the sum of the capacities of all memory modules inserted in the motherboard memory slots. The upper limit of memory capacity is generally determined by the motherboard chipset and memory slots. Different motherboard chipsets can support different capacities. For example, Inlel's 810 and 815 series chipsets support up to 512MB of memory, and the excess cannot be identified. In the early 21st century, most chipsets could support more than 2GB of memory. In addition, the number of memory slots on the motherboard will also limit the memory capacity. For example, if you use a 128MB memory, the motherboard has two memory slots and can use up to 256MB of memory. Therefore, you should consider the number of memory slots on the motherboard when selecting memory, and you may need to consider the possibility of future upgrades.

Extended knowledge: mobile phone storage capacity

The memory theory of mobile phones is the same as that of computers. The memory is RAM, RAM-RandomAccessMemory, volatile random access memory, and high-speed memory. Fetching, reading and writing time are equal and have nothing to do with the address, such as computer memory, etc. ROM-Read Only Memory. Information is not lost after a power outage, such as the BIOS chip used for computer startup. The access speed is very low (compared to RAM) and cannot be rewritten. Since information cannot be rewritten and cannot be upgraded, it is now rarely used.

RAM is composed of the first letters of the English Random Access Memory, which means random access memory, that is, data can be read and written to the memory at any time under normal working conditions. According to the working principle of the storage unit, RAM can be divided into static memory (SRAM) and dynamic memory (DRAM). Characteristics of RAM: It can be read and written; when the memory is powered off, the data stored in it will be lost. The memory we often talk about, such as computer memory, mobile phone memory, including the cache used in the CPU, all belong to this type of memory.

ROM is composed of the first letters of the English word Read only Memory, which means read-only memory. As the name suggests, this kind of memory can only be read, and cannot be read and written at any time like RAM. It only allows one write opportunity after production, and once the data is written, it cannot be changed. Another feature is that the data inside the memory will not be lost after power failure and can be stored for hundreds or even thousands of years. This type of memory is mostly used to store firmware, such as boot programs for computer startup, and corresponding program codes for some electronic products such as mobile phones, MP3s, MP4s, and digital cameras.

To sum up, RAM refers to the memory of the mobile phone, and ROM refers to the memory that stores the firmware code of the mobile phone, such as the mobile phone’s operating system and some applications such as games.

A complete ROM root directory will have the following folders and files: data, META-IN, system, boot.img, vendor, sdcard and other folders (data) are user installation applications The directory where it is located (META-IN) is the directory where system-related information is located. Generally, customizing a ROM to modify the system version information is in it. (system) is the directory where the system is located, which is equivalent to the Windows folder of the PC system. (boot.img) is an image file, which is the so-called kernel core. It is generally used when transplanting ROM.

Expandable storage: Expandable storage refers to the expansion of mobile phones through MMC cards, SD cards, T-Flash cards, Sony memory sticks, etc.

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