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Power Supply Difference

Echochrome4
  • 78 months ago

ATX ATX / BTX ATX12V ATX12V / EPS12V CPX EPS12V Flex ATX Micro ATX Mini ITX SFX12V TFX12V

What is the difference between all of these? And what are they compatible with? Do certain motherboards work with certain power supplies?

Comments

  • 78 months ago
  • 2 points

When choosing a PSU, you will need to look for case compatibility.

Motherboard compatibility can be found by seeing what the motherboard pwoer connection is. 20 pin or 24 pin.


ATX PSUs are the standard for most common desktops.

EPS PSUs are for high power consumption situations or for a small server situation. It is a variant of the ATX form factor, but is just "server ready". These will fit in ATX cases, as long as there is room for the extra depth.

CPX PSUs are a form factor made by Antec that is bigger than ATX and will only fit in some of their Antec cases.

FLEX ATX PSUs are not that popular, but it still exist as an addition to Micro ATX.

Micro ATX PSUs are also not as common, but still exist for a smaller-form factor to the ATX standard.

Mini ITX PSUs are also not as common, but still exist for a smaller-form factor to the Micro ATX standard.

SFX PSUs are also not not as common, but still exist in addition to Micro ATX.

TFX PSUs are also not as common, and are a little more narrower Micro ATX.

  • 78 months ago
  • 1 point

So when searching PCPartPicker I edited the options of what PSU show and ATX12V / EPS12V came up with the most. So is that the normal PSU type that I should get in almost all of my builds? And also don't most motherboards have 24 pin connections, but if it doesn't the power supplies 24 pin plug has a detachable 4 pin section if not needed?

  • 78 months ago
  • 1 point

For most builds, yes ATX PSUs are the standard. If you have a specific compatibility question, feel free to post it here.

And yes, most motherboards do have 24 pins. And yes, most PSUs will have a detachable 4-pin. To find this, look for 20+4 pin connectors listed on the retailers website.

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