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Case And Power Supply

Building Your Own PC, Part 1: Know-How for Do-It-Yourselfers
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Power Supply

The advent of processors breaking the gigahertz barrier has made one thing clear: their thirst for power is hard to rein in. When buying a case, take a very close look at the built-in power supply. In addition to the classic ATX power supply, it should also feature an auxiliary power connector. More and more motherboards require this plug to cover the power needs of a Pentium 4 or an Athlon XP. The only time you won't need it is if you're operating a CPU at 1400 MHz or less.

Classic ATX power supply plug.

Extra current for power-hungry CPUs: ATX12 (left) and P6 connector. (right)


An increasingly familiar sight on motherboards: on the left, the P6 (AUX); and on the right, the classic ATX plug.

An ATX12 socket on the motherboard.

Power Connectors For Drives

Your power supply will depend on how many drives you plan to install. Small cases only offer three or four connectors. Once you've used up all the available connectors, you'll have to use a Y junction to turn one plug into two.

One into two: a typical Y junction with large plugs.

This cable also comes with small plugs for connecting floppy drives and the like to a power supply.

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  • 1 Hide
    Anonymous , September 20, 2008 7:55 PM
    thanks,i hope my mum approves of my £700+ setup that i want lol ;) 
  • 1 Hide
    Marco925 , May 6, 2010 3:44 PM
    So Different compared to today's build it yourself article
  • 0 Hide
    Anonymous , December 13, 2010 5:36 PM
    y is this so hard
  • 0 Hide
    Anonymous , December 13, 2010 5:38 PM
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  • 0 Hide
    Anonymous , December 13, 2010 5:43 PM
    This is is so similar compared to today's build it yourself article
  • 0 Hide
    Anonymous , March 31, 2011 7:45 AM
    This is a pretty in depth guide on how to build a computer. I found How to Build a Computer pretty useful too.
  • 0 Hide
    Anonymous , March 31, 2011 7:46 AM
    How to Build a Computer is a pretty good guide too.
  • 0 Hide
    Anonymous , August 11, 2011 12:57 AM
    My son and his friend bought the components for a gaming pc. They had XP to put on the computer but it wont load. It has Linux on it. I don't know much about this sort of thing but could it be bc the XP is already been loaded on another computer? If I can find one of our op systems software that has an extra load on it will it load on the gaming pc with no problems? Just want to be sure in case I have to drop the money for the operating system.
  • 0 Hide
    joeman99 , January 30, 2012 7:05 AM
    I always use this manual when building PCs, I never touch or buy any computer without it http://howtofixstuff.blogspot.com/2012/01/how-to-build-computer.html