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Computer systems Task 1 P1 & P3

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Ashley Dugdale

on 15 July 2013

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Transcript of Computer systems Task 1 P1 & P3

Unit 3 Computer Systems
Task 1 P1 & P3
By Ashley Dugdale
The Motherboard is the main part of a PC because it holds most of the crucial components like the CPU and the RAM. It also provides ports for peripherals to connect to like USB and PCI.

CPU (Central processing unit) is pretty much the brain of a PC it deals with all of the basic arithmetical, logical, and input/output operations of the system. You can have more than one CPU, you can have two (dual core) or even four (quad core). The more you have the better your PC will preform.
The CPU has to have a Heat sink to stop it from over heating.
The most popular manufactures for CPU's are AMD and INTEL.
Memory (RAM)
The memory or RAM is a memory unit that temporarily stores data to be used at short notice. However unlike a hard drive if the power is turned off then the data is lost.
You can have different sizes of RAM from 512MB to 64GB. The more RAM your system has the smother it will run and the more programs that will be able to be used simultaneously.
RAM can be removed and upgraded but it is specific to the Motherboard so you can't just go to a shop and get an upgrade you have to check if it will be compatible.
Graphics card
The Graphics card is what allows the PC to display things on the screen. Sometimes they are built into the Motherboard but you can buy them separate if you want better graphics.
Some Graphics cards offer 3D as a function and a TV output so you can play on your TV.
Some Graphics cards have fans to cool them down.
Hard Drive
Hard drives are used to store data on. There are two types of Hard drive HDD and SSD, The difference between the two is that SSD (Solid state drive) doesn't have moving parts so its faster than a HDD (Hard disk drive).
There are many different sizes of hard drive from 60GB to 5TB SSD's are more expensive and tend to be smaller while HDD's are larger and cheaper, this makes HDD better for backing up large amounts of data.
However because SSD are faster they are better for Operating Systems and Programs.
There are multiple ways to connect to the internet for example you could use a dongle or a Ethernet cable.

A dongle is a USB stick that allows you to create an internet a data connection using 3G or 4G at a cost.
An alternative is to use a Ethernet cable that is connected to a modem. The only downfall of this is that you are now unable to move out of range of the cable.
Wireless is another option that allows you to connect if there is a router in range, the only disadvantage is that you can move out of range and loose the connection.
Input devices
Inputs are used to control the PC, for example a keyboard and mouse are inputs.

Other types of inputs include; a Microphone to record sound, a Graphics tablet to sketch things on the PC or a joystick for some games.
Output devices
Outputs are peripherals that send things out of the PC that humans can read or hear. For example headphones or a monitor.

Other outputs include; Printer for printing pictures or documents or speakers for sound.
How data flows
Brackets = Cache
To make data flow faster.
This shows how data flows through a PC.
Data flow is crucial to speed and performance of a PC. If data doesn't flow fluidly through the: CPU, RAM and Hard drive then it can effect the performance of the system and could result in it crashing.

A way to speed up a PC is to use cache. Cache is a middle man between the RAM and CPU. The cache makes it so the CPU doesn't have to move to get the information from the RAM. This makes the PC faster because the RAM hasn't got to wait for the CPU to take the information because the cache has it.
How power and data flows through a PC
This image shows how power flows in and out of a PC. It first starts in the PSU( power supply unit) then it moves into the Motherboard, DVD and HDD.
The image also shows how data flows around the PC, and how all the devices are connected to the motherboard.
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