Assembly of computer systemMotherboard: Find the motherboard standoffs (spacers) that should have come with the case. They are screws, usually brass, with large hexagonal heads that are tapped so you can fasten screws into the top. These hold the motherboard up off the case preventing a short-circuit. Set these aside. Remove the I/O Shield from the back of the case where the ports on the back of the motherboard will fit, and put in the I/O Shield that came with your motherboard. There may be small metal tabs on the inside of this face plate, if so you may have to adjust them to accommodate the ports on the back of the motherboard.

CPU: Installing the CPU, and the CPU’s heat-sink and fan, are by far the most difficult steps you’ll have to complete during your build. Here, more than anywhere else, it will pay to read the instructions carefully, look at the parts, study the diagrams that came with your CPU and/or third party cooling solution, and make sure you thoroughly understand what you are going to do before you try to do it. During the process, if anything does not seem to fit or make sense, put the parts down and look things over carefully before you proceed

Memory solts: Next, you will need to install your RAM (random access memory). Find the RAM slots on your motherboard; they will look something like the picture on your left. To install the RAM modules, first push on the levers (white plastic in the picture) on either side of the DIMM socket, so that they move to the sides. Do not force them, they should move fairly easily

Power supply: Installing your power supply is pretty straightforward, if it came with your case it was pre-installed and if you took it out earlier to get the motherboard in, now is the time to put it back. Otherwise a few moments of screwdriver work will get the job done. Generally there will be a bracket on the top of

case where the power supply is mounted and a few screws used to fix it in place. Some cases place the Power Supply differently; see the documentation that came with yours.

Video card: If you have an AGP video card: Install the video card into the AGP socket. This is always the top expansion slot near the back of the computer. AGP slots are often brown, but can also be strange colors

Such as fluorescent green. Check the motherboard for levers (or similar devices) that are part of the AGP slot to help hold the card in place. These must be retracted before insertion of the card. Check the motherboard's manual for information on how to use these devices (if your motherboard has one).

Jumper setting: before you install IDE/ATA (PATA) drives; you will need to set the drives jumpers. Each IDE/ATA channel can handle two drives, a master and a slave. Consult your drive's instructions on how to set the jumpers. The jumper configurations are usually either printed on the back, or on the top of the drive. Drives can be configured in 2 ways: Drive Select or Cable Select.

VGA PORTS: Monitors will either have a VGA, DVI, or a new HDMI plug (see picture, as they are a lot less apparent than PS/2 / USB by comparison). Most monitors use VGA connectors, and so most graphics cards have VGA output. If you have one type of plug and the graphics card has another, you can easily buy an adapter. Some cards even come with one.

IDE (integrated drive electronics) hard disk drivers:the ide interface specifies that the hard disk controller is bulit on the motherboard these drives are also called (parallel ata) drives as if uses parallel communication. The ATA (advanced technology attachment) transfers data between the hard disk and system using 16 bits bus width with speeds of up to 133MB per second.

IDE cable: IDE/PATA hard disks are connected to the IDE port on the motherboard using a

40/80 pin conductor cable.

SATA(serial ATA)hard disk dries: serial ata uses serial communications transfers data bit at a time with the speed of upto 600mb per second.SATA hard disk a smaller 7-wire cable to connect to the system this cables can have a maximum length of 1 meter