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SeaSonic ECO 300 300W SFX12V (v.3.1) 80 PLUS Certified Active PFC Power Supply

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  • SFX12V (v.3.1)
  • 80 PLUS Certified
  • 100 - 240 V 50/60 Hz
  • +3.3V@20A,+5V@20A,+12V1@8A, +12V2@14.5A,-12V@0.8A,+5VSB@2.0A

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  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the SeaSonic USA ECO 300

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years
  • Read full details
  • Return Policies
    • Return for refund within: 30 days
    • Return for replacement within: 30 days
  • This item is covered by Newegg.com's Standard Return Policy.
Ownership: more than 1 year
Verified Owner
4/ 5
Lasted 4.5 years

Pros: small, compact, had sata power and additional 12v power for board

Cons: slightly short lived...but it had to support two hard disks and a DVD drive in a hot enclosure.

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Ownership: less than 1 day
Verified Owner
5/ 5
Excellent

Pros: So quiet I can only hear a noise if I take off the case and put my ear next to the fan.

Fits SFX-compatible cases like microATX.

Cons: The basic dimensions of the PSU itself are 125mm x 100mm x 64mm, and the fan housing protrudes an additional 12.5mm from that. It slightly overlaps a corner of my motherboard, which would prevent me from plugging anything into there if that was necessary (which it isn't).

Overall Review: I replaced a PSU that sounded like a jet engine, with intensely heated exhaust too. The Seasonic is worlds better. Hopefully it is as reliable as people say.

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Ownership: more than 1 year
5/ 5
Clagmaster

Pros: Very well made and reliable power supply.

Power supply is especially well suited for legacy micro-atx cases. Connectors for a peripheral devices are more than adequate for a micro-atx build. Connectors are of perfect length for a micro-atx case.

Power supply is highly reliable.

Cons: No serious cons that would prevent me from buying this power again or recommending this power supply to friends.

The 80mm fan is audible during opertion but not loud.

Overall Review: I'm satisfied. My experiences are with the predecessor of this power supply. From what I can make of the specifications and pictures from then and now, this is the same unit upgraded to current SFX12V (v3.1) standards. I feel these comments are applicable.

I purchased this power supply as part of a complete rebuild of my Pastors 10-year old Dell in late 2007. This rebuild consisted of an ASUS M2A-VM 690G mobo, a 65W Athlon X2 4600+ CPU, 2 GB of Mushkin DDR2-800 memory, a Seagate ST3250310AS 250GB harddrive, Pioneer DVR-112D DVD/CD optical drive, and a floppy drive. This was powered by a Seasonic MicroATX-SS300V 300W SFX12V 3.0, the direct predecessor of this power supply. All of this was installed in the original Dell case that would only permit an SFX power supply.

This power supply has functioned in my Pastors PC for nearly 2 years without failure.

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Ownership: 1 month to 1 year
Verified Owner
5/ 5
Perfect for my build!

Pros: Stable power output, I sought out an 80 plus unit, and this one has done its job well! Fan is very quiet, but not silent. Temperature stays as cool as can be. SeaSonic has impressed me. Spend the extra dollars and get this quality PSU.

Cons: Fan mount may be too tall for some ITX cases. I ended up making my own case since the PSU was too close to the e8400 and was inhibiting proper ventilation.

Overall Review: Powering ZOTAC nForce 630i mini-itx board with e8400. Running nvidia 8400GS (at 1x PCI-e) and 3gb DDR2 @ 800. Western digital Velociraptor 300gb.

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
Powerful Little Monster

Pros: Powerful little PSU. Does what it's suppose to do.

Cons: Naw... None.

Overall Review: Had to purchase this PSU because the case I was using (HP Pavilion 6635) for my custom pc didn't have any. What can I say, the case is small.

Here's the Atom Project (in newegg item numbers):
- SeaSonic ECO 300 300W SFX12V (v.3.1) 80 PLUS Certified Active PFC Power Supply
- N82E16820231119
- N82E16813121359
- N82E16822148309
- N82E16827135192

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Ownership: 1 month to 1 year
Verified Owner
5/ 5
Works good, pretty quiet

Pros: High efficienty and quiet. Comes with ATX power supply bracket.

Cons: Fan is pretty quiet, but quieter.

Overall Review: I ended up putting it in a standard ATX case, so ATX bracket came in handy.

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
pretty good

Pros: it is a nice and heavy unit so it has good quality components. 80 plus certified so its good for the environment and your electricity bill.

Cons: it is bigger than i thought and was no measurements that i saw when i bought it so i cannot use it.

Overall Review: .

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
Perfect

Pros: Needed more power for a pci geforce 6200 256mb graphics card; (wanted 250watt and I had a ten year old 145watt psu) and this 300watt does the job. Installed unbelievably easy. 80+ is, well a plus to have. Computers draw power even when they're "off", so this SeaSonic will pay for itself eventually.

Cons: Not much quieter than the 145watt I had. Then again, the 145watt wasn't exactly loud.

Overall Review: On the box it's listed as being compatible with most E-Machine, HP Pavilion, and Compaq Pressario models.

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