When the CPU of the computer works, it will call data from the hard disk and store it in the memory module, and then read the data from the memory module. Compared with calling data directly from the hard disk, the data transmission between the CPU and the memory module is faster. Therefore, simply speaking, the memory module is the buffer of the computer, which helps the computer run efficiently.
Memory is divided into DRAM and ROM. DRAM is called dynamic random access memory (DRAM), but data will be lost when DRAM is powered off. ROM is called read-only memory, computer boot is the BIOS program stored in the ROM on the motherboard, and then through it to call the windows system. One of the main features of ROM is that the data will not be lost after the power is cut off.
To purchase a memory module, you must first determine which generation of memory the motherboard supports. There are four main memory modules, DDR, DDR2, DDR3 and DDR4. For example, if the motherboard model is H81, only DDR3 memory can be used. By looking at the motherboard slot, you can generally determine what kind of memory module the motherboard needs to insert. The working frequency of memory is also important. When the memory of different frequencies is mixed, the high frequency memory will be reduced to low frequency memory. Generally speaking, in order to maintain good compatibility, the new memory and the original memory should be the same brand.
Different versions of the system support different memory modules. Generally speaking, 32-bit system can only support 4G memory. So if the computer already has 4G memory modules, then add more memory modules to ensure that the system is 64 bit. The memory can be plug and play, and there are clasps on both sides of the memory slot, which can be loaded after opening.
As for how much memory to buy, it also depends on the user’s requirements. For example, the minimum memory requirement of Jedi survival game is 6G. However, there are only 4G and 8g memory modules on the market, so users need to buy 8g memory modules at least.
The size of the memory module affects the speed of the system to a certain extent. All data conversion of the CPU is carried out on the memory module. The more programs run, the larger the memory required. In addition, we must distinguish the memory from the hard disk. The hard disk is only responsible for storing and reading data.