The number of tracks on each platter is identical to the number of cylinders on the hard drive. Logicboards 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 of logicboards. The logicboard 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. On older Macs, the video card is built into the logicboard, but on newer systems the video card is either a PCI or AGP card. 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.