Power Unit

  Fleetblue 11:41 18 Apr 2011

I've been told I need a new power unit for my Dell XPS 420. Anyone know exactly what I'm looking for? Thanks.

  chub_tor 12:24 18 Apr 2011

According to this http://en.community.dell.com/support-forums/desktop/f/3514/t/19267468.aspx pretty much any standard ATX power supply will fit but the XPS 420 needs 6 SATA power outputs. If your selected PSU does not have all of these you can buy adapters for the standard IDE power connectors.

  Fleetblue 16:17 18 Apr 2011

Thanks for that tub_chor.

  Fleetblue 16:17 18 Apr 2011

Edit: chub_tor. Sorry.

  Fruit Bat /\0/\ 20:21 18 Apr 2011

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

  3. 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 http://www.directron.com/psu.html

  1. Power supply calculator http://www.antec.outervision.com/

  2. 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.

Guide to changing PSU http://www.quietpcusa.com/psuinstall.html http://compreviews.about.com/od/tutorials/ss/DIYPSU.ht

  Fleetblue 21:06 18 Apr 2011

Thank you Fruit Bat. Very full and comprehensive information. Much appreciated.

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