The number of tracks on each platter is identical to the number of cylinders on the hard drive. Mother Boards AKA system boards are usually the largest boards in the computer. They usually contain the processor, coprocessor, memory, expansion slots, and many integrated components. There are many different types and sizes. The mother board contains a core-logic chipset that regulates the system speed and directs all instructions from the CPU and memory to the buses that connect every device and peripheral in your machine.
Monitors allow video to be seen by the user.
They use a 15 pin connector. Video cards or video display adapters control the computer monitor. Power Supply Power supplies are most often found mounted at the rear of the case. They can range from 150 to over 200 watts depending on anticipated use. Most have output voltage of 5-12 volts.