first things you should know about building a PC

  For building a home PC you need this:
1. first thing and the most important is CPU the processor, the'' brain '' of the PC
2. Now if u choose the brain for '' Frankenstein '' it is time to choose the body = mother board or mobo.
    these two pieces are essential for PC, in fact if u have a good mobo with a good CPU, you don't get to have problems for few years
 3. memory for your PC
 4. you need a hard drive or SSD
 5. you need a computer chase
 6. and a power supply
!!!  If you want to build the PC for games, you'll need a Video Card
 7. keyboard and mice
you will need an operating system: Windows or Linux (Linux is Free) open source.
 the best Windows and the fastest is Windows 7


  and a  Monitor of course,

You have two best options to choose your parts:
       tigerdirect.com        http://www.tigerdirect.com/
       newegg.com           http://www.newegg.com/