Unit 1 2 p2 3 (2)
- 1. Ram (non Tec) • Ram is when you store memory for a short period off time • Ram is also measured in different sizes (1GB,2GB,4GB,16GB) • Ram also stands for random access memory • Ram is used for storing data for running programs
- 2. Hard drive (non Tec) • The hard drive is were you store your date and your programmes • Hard drives are measured in gigabytes, megabytes and terabytes • You can connect the hard drive by a sata cable • They make noise and have moving parts
- 3. Ram (TEC) • Most computers used a single data rate before 2002 • There are 3 types of ram which are SDR which stands for single data rate ,DDR double data rate , DDR 2 double data rate 2 and DDR3 double data rate 3 • DDR 3 is faster then SDR • DDR 3 average price of a ram is £29.00
- 4. Hard drive (TEC) • A hard drive is a data storage device used for storing and retrieving data an HDD retains its data when the power is turned off • The two most common sizes for modern hard drive are 3.5-inch in desktop computers and 2.5-inch in laptops. • The new type of hard drive is called solid state drive • The solid state drive has a much faster read/write speed then hard drives have • they have no moving parts that means they don’t make no noise or break easily
- 5. Power supply (non Tec) • A power supply is a device that supplies electric power to an electrical load • The term is most commonly applied to electric power converters that convert one form of electrical energy to another • The power supply gives out the right amount off power to each components • Power supply changes AC power into DC power • Psu stands for power supply unit
- 6. Power supply (TEC) • A power supply unit (PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. • Modern personal computers universally use a switched-mode power supply • Most modern desktop personal computer power supplies conform to the ATX specification, which includes form factor and voltage tolerances.
- 7. C.P.U • The cpu carries out the instructions and it is the brain of the computer • Cpu stands for central processing unit • The cpu works on a list of instruction staring from top to bottom one by one • The cpu is measured in hertz and megahertz
- 8. CPU Tec • It is an essential part off the computer • The computer will not work with out the C.P.U • The C.P.U is the brain off the computer and gives out instructions
- 9. Motherboard non TEC • The motherboard is the heart off the computer and is were all the components are placed • All the hardware is connected to the motherboard by cables • Sata, • PS/2 Keyboard Port • D-Sub VGA Port • DVI-D Port • USB 2.0 Port • RJ-45 Port • Audio Jacks • The motherboard comes in different colures like black, red and yellow but it is usually green • Parts that are removable are the cpu, ram and memory
- 10. Motherboard non TEC • The motherboard holds all the components • The motherboard is the heart off the computer and with out it the computer will not work