PSU Upgrade question

  JayDay 15:03 PM 28 Feb 12

I wish to upgrade my current 300w PSU to a 500w one.

My case is an ATX type, and the motherboard has a micro ATX form factor.

Am I right in thinking that as the PSU fits in the case I need an ATX PSU.

Full computer specs here

  KRONOS the First 16:55 PM 28 Feb 12

Why do you want to upgrade your PSU? At the moment I see little reason to upgrade it.Are you thinking of add a better graphics card perhaps?

  JayDay 16:57 PM 28 Feb 12

I am adding a second hard drive and upgrading the graphics card.

  Fruit Bat /\0/\ 17:18 PM 28 Feb 12

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

2. Power supply calculator

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.

Guide to changing PSU

  JayDay 18:23 PM 28 Feb 12

Thanks for the comprehensive reply. I will get out my tape measure :)

I have used an online calculator that recommends between 350w and 400w depending on which graphics card I end up purchasing. As there is little difference in prices for 400w and 500w I thought I might as well go a bit higher than I need at the moment.

  Fruit Bat /\0/\ 18:27 PM 28 Feb 12

Good idea, you will put less strain on it.


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