. Logic circuitry that handles all information it receives from hardware and software running in computer.
. Referred as CPU (Central Processing Unit) acts as heart of computer.
. Installed on a socket specified on Motherboard.
. Performs lot of operations at high speed.
. Produces heat, so provided with cooling fan to take out heat.
. Internally it looks like below which is made of number of transistors to function.
. Referred as CPU (Central Processing Unit) acts as heart of computer.
. Installed on a socket specified on Motherboard.
. Performs lot of operations at high speed.
. Produces heat, so provided with cooling fan to take out heat.
. Internally it looks like below which is made of number of transistors to function.
. We can find our Computer's Processor specification by right clicking on PC> Properties.
Components of Processor:
Control Unit (CU):
. Internal part of CPU that coordinates instructions and data flow between computer and other parts.
. Sends timing and control signals.
Arithmetic and Logical Unit (ALU):
. Performs all the Arithmetic and Logical operations in computer.
. Receives control signals from CU and input data to be processed.
. After performing operation, result is send to memory which in returns sends to output device.
Clock Speed:
. Speed is measured by number of clock cycles CPU can per perform in second.
. More the cycles, more the instructions it can carry out.
. Measured in Hertz, today's CPU's has speed of GHz.
Cache:
. Cache memory is used to increase performance of PC.
. It acts like buffer between RAM and CPU.
. Holds frequently requested data and instructions, so that they are immediately available to CPU when needed.
How it works?
1. Fetching:
. Various programs are stored in memory.
. During this step, CPU fetches instruction which is stored in particular address in memory.
. Program Counter keeps track of next instruction to be fetched.
2. Decoding:
. Instruction decoder decodes all the instructions fetched from memory.
. Control signals are generated and to handle further steps.
3. Executing:
. In this final step, CPU executes the instruction with help of ALU.
. Everything is done with help of registers.
. Again Instruction pointer points to next instruction decoded.
Types of CPU:
. Desktop and Laptop Processors are manufactured by Intel, AMD (Advanced Micro Devices).
. Mobile Processors are manufactured by Samsung, Apple, Qualcomm.
. Mobile Processors are manufactured by Samsung, Apple, Qualcomm.
. There can be single or multi core processors which effects performance.
. Core i7 and i5 consists of 4 cores whereas i3 consists of 2 cores.
. Performance of processor depends on number of cores, clock speed and cache memory it can handle.
. Performance of processor depends on number of cores, clock speed and cache memory it can handle.