1.2 Computer components

characteristics of graphics cards

• have video RAM, a GPU chip and usully HDMI and DVI connections
• the technology that allows the text on paper documents to be converted into text which is editable after scanning
• touchscreen typing difficult, poor battery life, dirty screen
• home use - low volume, high quality sometimes required for photos

description of power supplies

• �converts mains AC to low-voltage regulated DC�power�for the internal components of a�computer
• data transfer rates, startup time
• Imags produced can take up a lot of memory space, some quality lost in the process
• short wavelength radio signals used for communication

characteristics of ROM

• �non-volatile ,Data stored in these chips is unchangeable
• black and white are a bit more expensive, colour are a lot more expensive than ink jet.
• To allow user to work or game easily with large screen and keyboard
• to provide DC�power�for internal components of a�computer

purpose of of ROM

• �used to store the start-up instructions for a computer, also known as the firmware
• a type of�hardware device that�converts between analog and digital data in real time for two-way�network communication.
• connectivity method with short range, slow transfer rate, interference
• a personal computer that is designed to fit conveniently on top of a typical office desk

purpose of of SATA port

• �used with�hard drives�but is also used with drives such as�disc drives.
• a printed circuit board that controls the output to a display screen
• input device that enables you to speak into a computer or mobile device
• cable is highly conductive, with minimal energy loss

description of processors

• a chip housed on the motherboard and is the �heart� of a computer system � it controls everything
• More expensive than a mouse, not suitable for point and click programs
• �computers that make direct use of�quantum-mechanical phenomena, such as superposition and entanglement, to perform operations on data
• allows control of household objects from smartphone or controller like Alexa

characteristics of network cards

• a circuit board or card wih an ethernet connection (RJ45)
• using high power beams to transmit light signals for communication
• video conferencing, video showing seaside weather to potential tourists
• allows a computer to connect to a network using a wired connection

description of network cards

• a circuit board or�card�that is installed in a computer so that it can be connected to a network
• allows user to connect without wires, standards are agreed, eas to set up
• �a networking device that connects devices together by using packet switching to receive, process, and forward data to the destination device
• expensive, requires accurately formatted forms for completion

description of sound cards

• a device which can be slotted into a computer to allow the use of audio components for multimedia applications.
• expensive aonnection kits, possibility of hacked devices
• the technology that allows the text on paper documents to be converted into text which is editable after scanning
• a hand held input device used to capture and read information contained in a bar code.

description of storage controller

• a hardware device or software program used to manage�storage
• will be used by anyone who needs lots of computing power, or security agencies
• �a networking device that connects devices together by using packet switching to receive, process, and forward data to the destination device
• customisation, movement in all directions, intuitive