Harry hickford components for a computer Presentation Transcript
COMPONENTS FOR A COMPUTER By harry hickford
CPU CPU means central processing unit this carries out the instructions of the computer. It communicates the instructions from the software to the components. The speed of the processor is usually measured in MHz or GHz.
Heat sink The CPU it needs to be compatible on the socket on the motherboard The heat sink is cools down the laptop or the desktop when extremely hot and uses thermal compound to transfer the heat to the Processor.
Processor types There are 2 main manufactures of processors they are AMD and Intel. Processors can be Dual core and quad core processor more instructions and faster The latest processor is i7 but it produces a lot of heat. Processors can be 32 bit and the lastest are 64 bit
Memory ROM – read only memory it can only read data NOT write. RAM- random access memory when working on a computer the information is in RAM. When turning off the computer all the information is loss from RAM it is volatile
RAM is either SDRAM or DRAM. Cache memory is SDRAM it can be access very quickly by the CPU and the CPU when processing instruction. EPROM - Erasable Programmable Read- Only Memory can be rewritten using UV light and then EEPROM can be rewritten using electrical current. These are non volatile types of RAM
Storage devices Hard disc drive it stores the digital data of your computer for example the operating system and application data. The data can be stored on revolving platters that have magnetic material and there are magnetic heads for writing the data. Solid state - is a data storage device that uses solid-state memory to store persistent data with the intention of providing access in the same manner of a traditional block I/O hard disk drive.
Internal hard drives storage devicesPATA. These are now an slower old form of internal hard drives which are connected to the motherboard with PATA cables that are 40 pins SATA cables are 7 pin connecter and faster data transfer. One of the connecter is connected to the motherboard while the other one is connected to the hard drive
External storage devices External portable hard drives are now used for storing back ups including music, videos and documents. Normally these portable hard drives are connected by USB
Storage devices SCSI - is a set of standards for physically connecting and transferring data between computers and peripheral devices. There are SCSI hard drives that are used for RAID SCSI controllers
Adapter card These are printed circuit boards that’s can be inserted into an expansion slot of the computer motherboard. These slots are PCI or PCIe. The PCIe has a faster bus than the PCI card. PCMCIA is a very compact small device that slides into a laptop This is a wireless PCIe nick card for connecting a desktop to a network
Sound and video cardSound card is used A high quality video cardfor multi media built in memoryand it is oftenbetter to have PCIecard than one thatis on boardmotherboard
Motherboard The motherboard holds all of the internal components of the computer together it is a printed circuit board. The motherboard must be compatible with the computer case, the memory, processor and the power supply.
Power supply The power supply converts AC to DC. The power supply through the motherboard powers all of the internal components of the computer. The wattage of the power supply must be enough to give power to all of the components