Thank You Allah
>> Sunday, March 21, 2010
Khas untuk anda semua lagi..
:-)
6 years ago
Optical Media
>> Saturday, January 9, 2010
- Optical media into two groups:
> CDs and DVDs
> CDs store around 700 MB and come in three varieties:
- CD-ROM (read only memory: you can’t change the data on them)
- CD-R (recordable:you can change the data once)
- CD-RW (rewritable: you can change thedata on them over and over)
> DVDs store much more data—around 4 GB
Hard Drive
- Store programs and data that are not currently being used by the CPU
- Hard drive stores much more data than a typical PC’s RAM — up to hundreds of gigabytes
- Store programs and data that are not currently being used by the CPU
- Two(2) types:
> The older parallel ATA (PATA)
> Modern serial ATA (SATA)
- PATA drives use a ribbon cable very similar to the one used by floppy drives, whereas SATA drives use a very narrow cable
- Few PCs use Small Computer System Interface (SCSI) drives
> SCSI drives are generally faster and more expensive, so they usually show up only in high-end PCs such as network servers or graphics workstations
Floppy Drive
- Enables you to access removable floppy disks (diskettes)
- The floppy drive used in PCs today is called a 3.5” floppy drive
Power Supply
- Provides the necessary electrical power to make the PC operate
- The power supply takes standard (in the United States) 110-volt AC power and converts it into 12-volt, 5-volt, and 3.3-volt DC power
MotherBoard
It’s like the chassis of an automobile. In a car, everything connects to the chassis either directly or indirectly. In a PC, everything connects to the motherboard either directly or indirectly
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