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Athena Power AP-MPS3ATX40 400W Micro PS3 / ATX12V SLI Ready CrossFire Ready DELL, HP Upgrades/Replacement Power Supply

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  • Micro PS3 / ATX12V
  • 20+4Pin
  • 400W

  • Overview
  • Specs
  • Warranty & Returns
  • Reviews

The Athena Power AP-MPS3ATX40 Micro PS3 power supply is a great choice for many Dell, HP, IBM, Compaq, and Gateway PCs and other mini system or custom-built computers. A 400W output with dual 6-pin PCIe connectors make this unit competent for systems with an additional graphics card. The quality cooling fan with smart speed controller keeps your system running at peak performance and guarantees you great peace of mind.

  • newegg The Micro PS3 Design Micro PS3 power supplies are known mostly as a replacement power supply but it has now evolved and can be used for mini-ATX cases, custom built computers, mini-servers and more. With the increase of wattage and efficiency, the micro PS3 is a conventional PSU that can be used for multiple purposes.
  • newegg 400W Output This PSU provides 400W of robust and reliable output for your entire system. Single +12V output with dual 6-pin PCI Express connectors deliver sufficient power for your multi-core processor and graphics card.
  • newegg Smart Auto Fan Speed Controller With its thermal fan speed control it will detect the amount of heat generated by the computer and spin accordingly. Using this controller to detect the heat levels of the PSU, worrying about the heat levels becomes almost non-existent.

Learn more about the Athena Power AP-MPS3ATX40

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details
  • Return Policies
    • Return for refund within: 30 days
    • Return for replacement within: 30 days
  • This item is covered by's Standard Return Policy.
Ownership: 1 day to 1 week
Verified Owner
1/ 5
Buy if you like things that smoke and don't work 9/24/2014 5:28:27 PM

Pros: Small, cheap.

Cons: Everything, sais its 400w, at 360w it busts. Now you have a paperweight.

Overall Review: Don't buy.

0 out of 1 people found this review helpful. Did you?
Manufacturer Response:
Thank you for your review of our product. Providing a quality product is an important facet of our business at ACPC. Furthermore, every user’s feedback is immensely valuable to ACPC. However, If users encounter when using the Athena Power products have any questions, we encourage and welcome users can contact our Customer Service at: 626-810-5008 or E-mail to:
Ownership: 1 week to 1 month
Verified Owner
3/ 5
Not Great, But Good For the Money 9/10/2014 9:19:38 AM

Pros: -small form factor
-has the "ooh, ahh" feel when you open it and see how shiny it is.
-enough connectors for basic computers
-decent power overall
-great price for what you get

Cons: -low amperage on the 12v rail.
-only 1 12v rail.
-weak/thin wires and power cable
-almost too shiny (like it's saying, "i look cool outside, but inside i'm not that great")

Overall Review: i was powering a device that ran up to 30amps on 12volts. it was my fault i didn't check the output amperage first. but the connector wires heated up to where i almost couldn't touch them (i thought the rubber insulation was going to melt off), and the power cord got hot and really soft and flimsy (felt like a dead snake afterward). if you plan on using this power supply for anything anywhere near 350 watts, you should get a different power cord than the one they supply.
i ran this power supply at over what they rated it at, and it only lasted a few seconds. but (again) that's my fault. But for $20, you can't really go wrong, unless you need something that can power more than 20 amps.

0 out of 1 people found this review helpful. Did you?
Ownership: 1 month to 1 year
Verified Owner
3/ 5
Decent Power Supply 2/4/2014 5:32:24 PM

Pros: I needed a small cheap power supply for a smaller case and this did the trick.

Cons: While it comes with a few stupid Dell power connectors it lacks ATX12V (8pin) connector and the PCI-E power connectors are only 6pin (not 8 pin).

Did you find this review helpful?
Ownership: more than 1 year
Verified Owner
4/ 5
It lasts! 1/29/2014 8:40:20 AM

Pros: Makes power
May outlive most house pets

Cons: Does not make coffee

Overall Review: I hopped on and checked my order history to see what wattage this thing was, since I don't have physical access to it at the moment and I'm planning on connecting a semi-beefy video card to it. What's important about this is that I ordered it in 2010. Nearly 4 years ago. That's a pretty decent lifespan, and felt it was worth putting in a review. Of course it's going to croak tomorrow since I praised it because that's how the world works.

Did you find this review helpful?
Ownership: more than 1 year
Verified Owner
2/ 5
Dell Dimension 8400 Compatible 1/2/2014 8:34:32 PM

Pros: o It was fully compatible with my Dell Dimension 8400 right out of the box.
o Quiet compared to the aging OEM one it replaced.
o Decently cheap as I paid $34 for it.

Cons: o Doesn't last.
o Almost lasted 2 years.
o Other brands seem to fair much better in longevity.
o Seems like other reviewers have the same issue with lifespan.

Overall Review: Contemplating whether I should try another one or just forget it.

If you need a PSU now this one will work. Don't hope it will last however. The Manufacturer is responding but it seems theres only a 1 year warranty to keep in mind.

Did you find this review helpful?
Ownership: 1 month to 1 year
Verified Owner
4/ 5
12/30/2013 3:12:11 PM

Pros: It is small
It works
It hasn't exploded on me

Cons: It does run a little bit hot but that is fine for what I am using it for.

Overall Review: I needed to get a small PSU for an HP Pavilion but didn't want to get their OEM version so I settled for this. It doesn't fit inside of the case but it is small enough for me to just have sit right outside.

I was reluctant with this PSU at first but it has treated me well over the past year.

Did you find this review helpful?
Ownership: less than 1 day
Verified Owner
5/ 5
Not Athena's Fault 10/23/2013 6:10:49 AM

Pros: -Small
-Decently Equipped

Cons: Absolutely none.

Overall Review: Many people have been complaining about this not being a "Micro ATX" power supply. That is not Athena's fault and is not a good reason to give a bad review, especially when the user didn't even try to plug it in. It works as well as you could expect a PSU this cheap to work. Also, if you read the description, it is clearly advertised as a Micro PS3, not a Micro ATX. In fact, it does not say anywhere in the "Specifications" tab that it is a Mirco ATX. Furthermore, the measurements are right there for all to see. If size is a concern, one aught to take measurements. Here is some advice: If a product is really cheap, like this one, do your homework or at least read the specifications.

1 out of 1 people found this review helpful. Did you?
Ownership: 1 month to 1 year
Verified Owner
1/ 5
Junk 7/23/2013 6:17:12 AM

Pros: Made of metal?

Cons: Does not POST with two motherboards, and killed a third one.

Overall Review: The QC of this power supply sucks. The otput voltages are inaccurate. It has thin wire to the ATX connector, and they are poorly crimped. I could go on and on. Too bad I have had it over 30 days, due to my lack of time building a new system, or back to newegg it would go. I would stick to Sparkle or Corsair.

1 out of 1 people found this review helpful. Did you?
Manufacturer Response:
Thank you for your review of our product. Should any user have issues with selecting the correct power supply, for their specific configuration, Athena Power Customer Service will be happy to help to produce a system power budget. Customer Service can be reached via landline at 626-810-5008 or Thanks again!
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