Computer Hardware - cs.mtsu.edu › ~spp2k › 1150 › 002 › L03.pdf · hardware within a...

Computer Hardware

Input Devices

• In computing, an input device is any peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system such as a computer or other information appliance.

Keyboard

• Wired or wireless

• Keyboards for phones

• Ergonomic Keyboard

Mouse

• Wired or Wireless

Alternative Pointing Devices

• Trackballs

• Pointing Stick

• Touch pads

Touch-Sensitive Pads and Touch Screens

Pen Input

Game Controllers

Visual Input

Voice Input

http://www.midomi.com/ Shazam Soundhound

Scanners and Readers

Biometric Data

Output Devices

• An output device is any piece of computer hardware equipment used to communicate the results of data processing carried out by an information processing system (such as a computer) which converts the electronically generated information into human-readable form.

Display Devices

LCD Screens CRT

Display Devices – Cathode Ray Tub

Display Devices – Cathode Ray Tub

LCD – Liquid Crystal Display

• http://www.youtube.com/watch?v=jiejNAUwcQ8

• RESOLUTION:

• 1280×1024 Pixels, 60 Hz, 8 Bit Color Number of bits per second displayed?

• Camera has Mega Pixels (Million Pixels)

Speakers, Headphones, Earbuds

Printers, Plotters and Projectors

The System Unit

• The case that contains all the electronic components • Includes:

– Motherboard – Processor(s) – Memory – Buses – Drive Bays and Drives – Power Supply – Video/Graphics cards – Wireless adapter card – Fans/cooling

The System Unit

The Case

Motherboard

• Holds many of the crucial components of the system, such as the central processing unit (CPU) and memory, and provides connectors for other peripherals

Motherboard

Processor(s) or CPU

• CPU: stands for Central Processing Unit. Is the hardware within a computer system which carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of a system.

• Multi-core – two or more CPU’s

• Node – Holds a Multi-core CPU

Processor(s) or CPU

Multi-Core and Parallel Processing

Pipelining

Threading and Hyperthreading

• Each CPU can handle a thread

• Thread does a pipeline

• CPU has to execute pipeline for each thread

• Hyper threading

Cooling

CD-Rom Drive

Video/Graphics Cards

Video/Graphics Cards

Power Supply Unit

Speed and Performance

• Measured in Hz (number of cycles per second)

• Refresh Rate of TV, 60, 120, 240 Hz (GO BACK TO LCD SLIDE)

• Processors now at GHz That’s 1,000,000,000 Hz (Billion)

Speed and Performance

Links

• http://pcpartpicker.com/

Memory

• Hard drive

• RAM

• More on this later