computer hardware - cs.mtsu.edu › ~spp2k › 1150 › 002 › l03.pdf · hardware within a...
TRANSCRIPT
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
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
Memory
• Hard drive
• RAM