ROM and RAM Overview
RAM: RAM-RamdomAccessMemory volatile random access memory, high-speed access, read and write time is equal, and has nothing to do with the address, is the internal memory and CPU directly exchange data, also called main memory. It can be read and written at any time, and it is very fast, usually as a temporary data storage medium for operating systems or other running programs.
ROM: Short for Read-Only Memory, a read-only memory. Its characteristic is that it cannot be changed or deleted once it is stored. It is usually used in electronic or computer systems that do not require constant data changes, and the data does not disappear because the power is turned off.
The difference between ROM and RAM
One sentence summary:
ROM = computer hard disk (also called flash memory on the box)
RAM = computer memory (box to memory)
The concept of RAM and ROM first came from the computer, so let's compare the network set-top box and the computer.
The memory RAM of the network set-top box is equivalent to the memory used by the computer. We know that the greater the memory of the computer, the faster the computer can run. (Theoretically speaking, this is true, but the actual and operating system-related, the 32 system can only recognize the highest 4G memory, 64-bit system can recognize more than 128G) But if the computer or set-top box shuts down, then the RAM memory is released.
Then the ROM of the network set-top box is equivalent to the hard disk in the computer (now known as the SSD). The ROM, like the hard disk of the computer, is divided into multiple sectors and stores system files and user files, even if the computer (network The set-top box is shut down, and the data in the ROM memory will not be lost.
Summary: RAM is the running memory of the machine, its size affects the running speed of the machine, and ROM is the internal storage space provided by the machine, its size affects the available storage space of the user on the machine (the amount of software installation live data storage the amount)
RAM memory is much more expensive than flash memory, plus system limitations, so the network set-top box memory is generally 512M or 1G, and ROM flash memory is generally 4G or 8G, some set-top boxes claim to be 16G or 32G, may be through the software Modified.
Why do some manufacturers take ROM as RAM promotion
When we buy a computer, we must purchase memory and hard disk. The 2G memory is generally more than 100 yuan, while the 1024G hard drive is only three or five hundred yuan. From this we can see that the price of the same capacity RAM memory is higher than that of the ROM flash memory. Much more. And we mostly pay attention to memory when purchasing smart devices, because we know that the bigger the memory, the better. So some manufacturers take this kind of heart of the user and use flash memory as the memory to get more popularity and sales.
Windshield Cell Phone Mount,Car Windscreen Mobile Phone Holder,Car Windshield Cell Phone Holder,Car Windscreen Cell Phone Holder
Ningbo Luke Automotive Supplies Ltd. , https://www.nbluke.com