Transcript Slides

Battery
BIOS
CPU (Central Processing Unit)
Brain of the computer
Executes millions of instructions per second
Built using millions of transistors
Needs a heat sink and a cooling method
Memory
Types: Volatile and Non-Volatile
RAM : Random access memory
ROM : Read only memory
BIOS : Basic input/output system
Random Access Memory
Volatile
Accessed Randomly
RAM capacity can be increased
Read Only Memory
Non-Volatile
Mainly used for chipsets
ROM capacity is fixed
Used for its permanence and Security
Data is written once on it during
fabrication
Basic input/output system
EEPROM or Flash
Performs POST (Power-on self test)
Contents can be upgraded or re-installed
Motherboard Interfaces
1- AGP (Accelerated Graphics Port)
Used for VGA (Visual Graphics Array)
cards
When having built-in VGA, no need
for VGA card
Motherboard Interfaces
2- PCI (Peripheral Component
Interconnect)
Used for Modems, LAN cards, Sound
Cards
Laptops and new PCs have PCI Express
Battery
Lithium Battery
Usually 3 volts
Used to Keep clock and calendar running
When the PC is turned off
Power Supply
Used to supply all components of
PC with power
Usually outputs 0, 3.3, 5, 12 volts
Converts AC voltage from outlet
To DC voltage for PC components
Storage
1- Fixed Storage
Hard Disk
- Magnetic disk
- High storage capability
- Non-volatile
- Technologies (IDE,SCSI,ATA,SATA)
Solid State Drive (SSD)
- Use transistors
- Faster
- Non-volatile
- No moving parts
Storage
2- Removable Storage
Floppy disk
-1.44MB
- Not used nowadays
Optical Drive
- CD
- DVD
- Blu-Ray
Flash Memory
- Removable SSD
- High capacities
- Cheap and Fast
Computer Ports