Classification Of Memory

Memory is divided into two types: DRAM and ROM. The former is also known as dynamic random access memory, and its main feature is that data will be lost after power failure. The memory we usually refer to is this type; The latter is also known as read-only memory. When we boot up, we first start the BIOS program stored in the ROM on the motherboard, and then use it to call Windows on the hard drive. One of the main features of ROM is that data will not be lost after power failure.
According to the number of pins on the memory module, we can divide it into several types such as 30 wire, 72 wire, 168 wire, etc. The 30 wire and 72 wire memory modules are also known as single column memory modules (SIMM), which are memory structures that provide the same signal on both sides of the gold fingers. The 168 wire memory module is also known as a dual column memory module (DIMM). The 30 line memory module is no longer available; The popular variety in the first two years was 72 line memory modules, which generally have capacities of 4 MB, 8 MB, 16 MB, and 32 MB; The mainstream variety in the market is 168 line memory modules, which generally have capacities of 16MB, 32MB, 64MB, 128MB, etc. A typical computer can simply plug in one module, but only motherboards based on VX, TX, BX chipsets support 168 line memory modules.