Generally, a controller is known as the system or device that controls several components in order to achieve maximum performance. Computer controllers are referred as the devices that control any kind of data transfer from the host to other secondary devices like display screens, disk drives, printers, keyboards, etc. For any kind of personal computer, the controller is designed to work with the computer’s extension bus.
Basically, when a new computer system is assembled, it consists of all the indispensable and standard controllers required to enable the peripheral devices as stated above, and many others as well. Usually, the controllers are single chips that control all the devices linked with a personal computer.
In general, there are three types of bus structural design available for personal computers, namely the PCI (Peripheral Component Interconnect), the AT bus, and the SCSI. Numerous brands of controllers are available nowadays with affordable prices such as Compaq, IBM, Adaptec, Mylex, and many others. You should purchase the controllers that support your computer’s bus architecture to get the best performance.
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