RAM is a form of computer data storage which allows data items to be read and write in the same time regardless of the order in which data items are accessed. In contrast, other secondary storage like hard disks, CD-RWs and DVD-RWs etc, time required read and write varies with data item’s form.
#Most RAMs are volatile memory because we can’t get back stored information when power is interrupted.
Types of RAM:
Main types of modern RAM are :
1. SRAM(Static RAM)
2. DRAM( Dynamic RAM)
It is more faster and reliable than DRAM because of its low access time and cycle time. Less cycle time means it doesn’t have to pause between accesses. SRAM is more expensive and less dense so not used in low cost applications such as main memory in PCs. Generally it is used for cache memory due to high cost.
It stores each bit of data in one transistor and one capacitor as compared to SRAM, which uses four or six transistors for one bit. DRAM is used as main memory in personal computers(PCs), Desktops, Workstations etc. Memory stored in RAM is represented in bits, conventionally called 0 and 1.
Uses of RAM :
1. To read and write data quickly from a data module.
2. To speed up our computer because of low access time and cycle time as compared to secondary storage.
3. RAM chips are only capable of storing and accessing information when electrical power is present.
4. It is used in our personal computers, workstations, Desktops & smartphones also.