SYSTEM UNIT PARTS FUNCTION Hard Disk Drive A hard drive or hard disk drive (HDD) is a type of data storage device that is used in laptops and desktop computers. An HDD is a “non-volatile” storage drive, which means it can retain the stored data even when no power is supplied to the device Random Access Memory It acts as a temporary storage location. It makes it possible to read files faster. RAM is utilized to rapidly retrieve data, which is required for reading any file's contents and it improves application performance. EXPANSION CARD An expansion card, or add-on card, is used to provide additional functionality to the system or to upgrade an existing function, such as sound or video. For example, an expansion card is a sound card, network card is the main internal hardware component of the system unit. This board is called the “motherboard” because it has all the connectors that connect to the other hardware components of the computer system. This means that all input and output (I/O) devices have their connectors on the motherboard. A component that draws heat away from a CPU chip and other hot-running chips the primary component of a computer that acts as its “control center.” This is also referred to as the “central” or “main” processor or the brain of a computer is a hardware device that converts AC electricity into DC electricity and then distributes it to the rest of the computer MOTHERBOARDC CPU COOLER Central Processing Unit Power Supply Unit IMAGE