Buying a PSU

  chaudha 15:16 30 Jan 2009


I am looking to prolong my PC setup. It's old (pentium 4 and AGP graphics) and I will be upgrading in a year or so. I need to replace my PSU because it is underperforming. Can I get a half decent new one (that I can use when I upgrade) or do I have to get something older that suports my motherboard. Here it is:

click here


  Fruit Bat /\0/\ 15:44 30 Jan 2009

If renewing a PSU check:

1. The physical size of your PSU, some are hard to replace due to being a non standard size.
2. The amount of power need from the PSU don't skimp.
3 The correct connections for your equipment

1. Physical Dimensions

Besides the specs and form factors, the physical dimensions are also important factors in selecting a compatible power supply. Here is an outline of the physical dimensions of most standard power supplies:

# ATX: 6x3.5x5.5", HxWxD. Most common. Uses 4 mounting screws.
# Mini-ATX: 5x3.5x5", HxWxD. Rare size. Uses 4 mounting screws. Can be used in a regular ATX case, but often not the other way around.
# MicroATX: 5x3x4", HxWxD. Use 3 mounting screws. Not interchangeable with ATX or miniATX.
# Flex ATX: Even smaller than Micro ATX. Various sizes according to case specs; often not interchangeable.

Use the data above to determine if a particular power supply would fit your case.

The quality of a power supply can be estimated by its weight. While this is not a true scientific or thorough measurement of the power supply reliability, it is nevertheless a very simple and easy way for ordinary PC users to estimate and compare the quality of a power supply. Why weight matters click here

2. Power supply calculator click here

3. Correct connections
Some boards have 20 pin connectors others 24 pin
There is often a 4 pin plug required to power Intel CPUs
Molex D plugs for IDE HDD and CD/DVD drives
SATA power connections for latest HDDs and DVD drives.

  Belatucadrus 16:41 30 Jan 2009

Just replaced a failing PSU in my old Medion with a cheapo from ebuyer click here not as quiet as the original, but has transformed what was becoming a crash prone disaster area back into the reliable PC it used to be, without making a walloping great hole in the kitty.

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