Desktop computer:

Desktop computer all component in separately:

A computer is made up of a case which houses several important internal components, and provides places to connect the external components, including non-peripherals.

Inside the case go the following internal parts:

SL	Component Name	Description	Product picture	Visual picture	Approximate prize
1	Motherboard/ Mainboard	As the name indicates, this is the electronic centerpiece of the computer: everything else connects to the motherboard. Visit to know details about Motherboard http://computerknowledge.net/MotherboardE1.aspx			$46 to above Average: $50-$200
2	Processor/CPU	Central Processing Unit, the "brain" of the computer, most actual computation takes place here. Visit to know details about Motherboard http://computerknowledge.net/DefinitionProcessorE1.aspx			$65 to above Average: $65-$450
3	RAM	Random Access Memory, the "short-term memory" of a computer, used by the CPU to store program instructions and data upon which it is currently operating. Data in RAM is lost when the computer is powered off, thus necessitating a hard drive. Visit to know details about Motherboard http://computerknowledge.net/RamE1.aspx			$10 to above Average: $10-$25
4	Hard Drive	The primary method of storage in all desktop computer system is a hard drive. Visit to know details about Motherboard http://computerknowledge.net/HardDiskE1.aspx			$30 to above Average: $50-$150
5	Power Supply/ PSU	Power Supply Unit, converts outlet power, which is alternating current (AC), to direct current (DC) which is required by internal components, as well as providing appropriate voltages and currents for these internal components.			$10 to above Average: $13-$125
6	DVD or Blu-ray Drive (Optional)	To run or burn DVD, CD etc.			$14 to above Average: $14-$18
7	Video Card (Optional)	Pretty much every desktop processor now features an integrated graphics processor. This makes video cards more specialized than they were in the past. You will use one of these if you are planning on playing 3D games or will be accelerating non-3D programs like Photoshop or video encoding.			$43 to above Average: $45-$1000
8	Sound Card (Optional)	Most motherboards feature some form of built-in sound controller on them. As a result, sound cards are not required unless you want higher fidelity computer audio or less reliance upon the CPU to assist with the computer audio.			$10 to above Average: $30-$150

SL	Component Name	Description	Product picture	Visual picture	Approximate prize
1	Monitor	The monitor is the display for a PC. This is where anything you can see is displayed. Monitors vary in size and use LCD/LED screens for better quality. They connect to your PC through a DVI or HDMI cable attached to the graphics card.			$35 to above Average: $55-$500
2	Keyboard	The keyboard is the main way of typing on a PC. When typed, each key produces a letter on the screen. Keyboards vary depending on what they are used for, some are basic and used for normal activity or specialist keyboards that control computer functions are also used in specialist industries. Keyboards connect to a PC wirelessly or use USB cables.			$5 to above Average: $5-$25
3	Mouse	The mouse is the primary way of navigating a computer. The mouse used to have a ball that could move in any direction. Now, infra red lasers have replaced the ball and are more efficient than the ball mice. Currently, touch controlled mice with no physical buttons are being tested but are not as good as the laser or ball mice currently used on many PCs.			$5 to above Average: $9-$25
4	Printer	The printer is computer hardware that will print anything written or created on a PC onto paper, whether it be text or photos. Printers on the market today use either inkjet (liquid ink) or laser (toner) technology. They also have other functions besides printing, this includes copying, faxing and scanning making it a useful piece of hardware.			$35 to above Average: $50-$2000
5	Computer Casing	Power Supply Unit, converts outlet power, which is alternating current (AC), to direct current (DC) which is required by internal components, as well as providing appropriate voltages and currents for these internal components.			$25 to above Average: $25-$150
6	Speaker	Speaker for output of audio from computer. Speaker connected to motherboard to audio card.			$5 to above Average: $25-$142

Video:

How to Extend (increase the size) of a hard drive (C:) partition: