Hardware

Hardware:

                   Computer hardware is the collection of physical elements that comprise a computer system. Computer hardware refers to the physical parts or components of computer such as monitor, keyboard, hard disk, mouse, etc...

Processor:

 @ it is heart of the computer.
 @ Central processing unit (CPU), an electronic circuit which executes computer programs, containing a
      processing unit and a control unit.
            Processors can be identified by two main parameters: how wide they are and how fast they are. The speed of a processor is a fairly simple concept. Speed is counted in megahertz (MHz), which means millions of cycles per second—and faster is better! The width of a processor is a little more complicated to discuss because there are three main specifications in a processor that are expressed in width. They are

• Internal registers
• Data input and output bus
• Memory address bus 

 when we buy a processor then must see the
# Speed
# Width
# FSB
# Cache memory
Speed:- It is  taking the Processor to execute the instruction is called speed.
Width: The amount of data(Bits) that the Processor can tranfer at a time.
              Ex: 16 Bits.32 Bits and 64 Bits

FSB:(Front side bus):-Is a computer communication interface (bus).It carry data between the central processing unit (CPU) and a memory controller hub, known as the northbridge.Depending on the implementation, some computers may also have a back-side bus that connects the CPU to the cache. This bus and the cache connected to it are faster than accessing the system memory (or RAM) via the front-side bus.

Cache memory:- A Cache used by the central processing unit of a computer to reduce the average time to access memory. The cache is a smaller, faster memory which stores copies of the data from the most frequently used main memory locations. As long as most memory accesses are cached memory locations, the average latency of memory accesses will be closer to the cache latency than to the latency of main memory.
Cache Memory is divided into 2 levels of cache.
1.L1 Cache(Level 1 Cache)
2.L2 Cache(Level 2 Cache)
Present the available cache are L1 Cache is 512 Kb
                                                L2 is 8 MB
Mother Board:-
 Components are:--

   * Processor Slot/Socket
   * Memory modules
   * Input Output Ports
   * Chip sets
   * Expansion Slots
   * Reserved Slots
   * CMOS Battery
   * IDE/SATA Connectors
   * Heat sink