Main Components

Mainly in a computer three main components are CPU, RAM and HardDisk. CPU(Central Processing Unit) is the brain of computers where we do all the tasks and process the data. The hard disk is connected to RAM and RAM is connected to the CPU.But why HardDisk is not direct connect to CPU ? The reason is simple the speed mismatch. CPU can do high speed task but the harddisk build with magnetic disk so it send data slowly.Thats why is not direct connected to CPU. RAM is volatile, it send and receive data very fast so it connected to CPU so that the CPU will not remain idle.