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Flashcards in computer hardware Deck (14):
1

what does a cpu do

Performs calculations.
Controls the flow of information.
Plugs into motherboard.
Multi core (i.e. several CPUsin one)
Quad core isnormal currently.
AMD, Intel, ARM

2

Primary Storage

Forgets when the power is turned off.
Called:
Memory
RAM
memory sticks
DDR3, DDR4 are specific types of memory.
Plugs into the motherboard.
16 GB is now a typical for a new PC

3

Video Card

Decodes and displays mp4 videos in real time.
Models 3D for computergaming.
Plugs into motherboard.
Powerful videocard consumehigh power.
May be built into the motherboard

4

Sound Cards

Old motherboards: separate sound card needed.
Modern motherboards: sound card built in.
May purchase plug in card to gain high quality sound

5

Universal Serial Bus (USB)

For many things:-
Keyboard
Mouse
Speakers
Headphones
Printer
Camera
External storage
Network
Phone charger

6

Local Area Network (LAN) card

Also called Network Interface Card (NIC).
Wired Ethernet is most common:
10baseT (10 million bits per second)
100baseT (100 million bits per second)
1000baseT (= gigabit Ethernet)

7

Secondary Storage Devices

Much slower than primary storage (RAM)
Remember even when disconnected or computer turned off.
Can be internal or external.
Can use magnetic or solid state technology

8

Secondary Storage Devices
Magnetic Disk


Known as Hard Disk Drive (HDD)
Currently up to 3000GB
Internal – plugs into motherboard.
Can buy external USB drives.
Rotating platter covered in magnetic material
Slow, seek & rotational latency
(7200 rpm = 8.4 milliseconds

9

Secondary Storage Devices
Internal Solid State Disk (SSD)

Made from integrated circuit technology
plugs into motherboard
very fast.
Currently up to 1000GB
$0.50 per Gigabyte (as of 2014)
Less robust than magnetic technology

10

Secondary Storage Devices
External USB drive

thumb drives” or “USB sticks”
Also a Solid State Disk (SSD)
Way more reliable than floppy drives
Slow

11

Monitors

CRT (Cathode Ray Tube)
Take a lot of space
Heavy
LCD (Liquid Crystal Display)
Thin
Light
Big screens

12

Monitor Connectors

Video Graphics Array (VGA)
Digital Video Interface (DVI)
High-Definition Multimedia Interface (HDMI)

13

Mouse

1964 The first mouse
Douglas C. Engelbart
1968 Ball mouse
1998 Laser Mouse

14

Backup methods

Another hard drive
Another computer in the same house.
A DVD ROM
Removable storage
Cloud storage
Encrypt anything sensitive