The memory capacity is generally a multiple of 2, such as 64MB, 128MB, 256MB, etc. Generally speaking, the larger the memory capacity, the more conducive to the operation of the system.At the beginning of the 21st century, the mainstream memory capacity of desktop computers is 2GB or 4GB, and 512MB and 256MB of memory have been less used.The system recognizes memory in Byte（byte）Is the unit, each byte consists of 8 bitsBinaryIt is composed of 8 bits.According to the binary mode of the computer, 1Byte=8bit;1KB=1024Byte；1MB=1024KB；1GB=1024MB；1TB=1024GB。
1KB=1024B=1024 bytes
1MB=1024KB=1048576 bytes
1GB=1024MB=1073741824 bytes
1TB=1024GB=1099511627776 bytes
1PB=1024TB=1125899906842624 bytes
1EB=1024PB=1152921504606846976 bytes
1ZB=1024EB=1180591620717403424 bytes
1YB=1024ZB=1208925819614629174706176 bytes
The amount of memory in the system is equal to that inserted on the motherboardMemory socketAll onMemory moduleThe sum of the capacity. The upper limit of the memory capacity is generally determined byMainboard chipsetAnd memory slots.Different motherboardsChipsetDifferent capacities can be supported. For example, the 810 and 815 series chipsets of Inlel can support up to 512MB of memory, and the redundant parts cannot be recognized.At the beginning of the 21st century, most chipsets can 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 a 128MB memory is used, the motherboard has two memory slots, and the maximum memory can be 256MB.Therefore, when selecting memory, you should consider the number of memory slots on the motherboard, and you may need to consider the possibility of future upgrades.
Mobile phone storage capacity
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mobile phoneMemoryThe theory is the same as that of computers. RAM is the memory, and RAM RandomAccessMemory is easy to usevolatilityRandom access memory, high-speed access, equal read and write time, and address independent, such as computer memory.ROM-Read Only Memoryread-only memory。Information will not be lost after power failure, such as that used for computer startupBIOS chip。Access speedVery low (compared with RAM) and cannot be overwritten.Because the information cannot be overwritten and upgraded, it is rarely used now.
Body memory: RAM is composed of the first letter of Random Access Memory, which meansRandom access memory, that is, in normalworking condition You can go downstorageRead and write data at any time in.according toStorage unitRAM can be divided intoStatic memory（SRAM）AndDynamic memory(DRAM)。RAM features: readable and writable;After powering off the memory, the data stored in it will be lost.The memory we often talk about, such as computer memory, mobile phone memory, includesCPUUsed inCache, all belong to RAM.
ROM is composed of the first letter of Read only Memory, which meansread-only memory。As the name implies, this kind of memory can only be read and cannot be used at any time like RAMReading and writing。It only allows one write opportunity after production. Once the data is written, it cannot be changed.Another feature is memoryPower failureThe data in the post can be stored for hundreds of years without losing.This kind of memory is often used to store firmware, such as computer startupBootstrap, mobile phone, MP3, MP4Digital cameraThe corresponding program code of some electronic products.
To sum up, RAM refers to the memory of the phone, and ROM refers to the storagePhone firmwareCode memory, such as mobile phone operating system, someapplication programSuch as games.
A complete ROMroot directoryThere will be the following folders and files: dataMETA-IN、 system、boot.img, vendor, sdcard and other folders (data) are usersInstall ApplicationThe directory (META-IN) is the directory where the system related information is located. Generally, a customized ROM is used to modify the system version information.(system) is the directory where the system is located, which is equivalent to the Windows folder of the PC system. (boot. img) is aMirror fileIs the so-called kernel core, which is usually used when porting ROMs.
For ordinary home use and daily office work, the mainstream configuration in the early 21st century is 2G. For large-scale image and data processing, it is generally recommended that the configuration should be above 4G.
tablet PC
It refers to the standard memory of the machine. Generallytablet PCThe standard memory capacity ranges from 2G-8G, and there are alsoSpecial purposeThe machine is equipped with more than 16G of memory.Types of memory andOperating frequencyIt will have a certain impact on performance, but the impact of capacity is even greater.Under the condition that other configurations are the same, the memory is larger thanhighly technologized societyThe higher the performance.
