CHAPER 3 COMPUTER HARDWARE. Learning Objectives. Identify the major hardware components of a computer Describe the design and functioning of the central processing unit Describe the main types of primary and secondary storage
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Some basic understanding of computer hardware design and function is essential because firms (and individuals) frequently must assess their competitive advantage in terms of computing capability.
a microprocessor is made up of thousands of transistors embedded in a circuit on a silicon wafer or “chip”
controls the flows of data according to instructions.
Instructions are detailed descriptions of actions that should be done during data processing and transmission
performs the arithmetic calculations and logical operations:
PRIMARY STORAGE (MAIN MEMORY)How the CPU Works?
MIPS – Machine Instruction cycle per second
The transistor densities on a single chip will double every 18 months.
Computer memory affects the type of program it can run and the work it can do, its speed, and both the cost of the machine and the cost of processing data. It is use to hold:
store data via magnetism
A drive – a device, which contains a read/write unit for a second storage
Stacks of hard disks are hermetically sealed in the hard drive
Redundant Arrays of inexpensive disks (RAID) technology
A pinpoint laser beam is used to burn tiny holes into the surface of a reflective plastic platter
Portable Personal Computer
Impractical for mobile computing
Designed for mobile computing
Difficult to expand
Uncomfortable ergonomics (small keyboard, often with inconvenient placement of function keys)
Easy-to-use mouse or other
Awkward pointing devices (some allow
traditional mouse to be connected)
High resolution/brightness monitor
Lower resolution, less bright
High RAM and hard-drive capacity
Somewhat less RAM and hard-drive capacity
More difficult to service/repair
Can utilize all current PC chips
Some models cannot use some chips, due
to cooling problemsDesktop or Portable PC : The Tradeoffs
the video screen used with most computers that displays input as well as output