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Item#: N82E16817151085

SeaSonic SS-300ES Bronze 300W ATX12V V2.3 80 PLUS BRONZE Certified Active PFC Power Supply - OEM

  • ATX12V V2.3
  • 80 PLUS BRONZE Certified
  • 47 - 63 Hz

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

The SeaSonic SS-300ES Bronze power supply is designed with the value-conscious user in mind. Certified for 80 PLUS Bronze, this active PFC unit runs at up to 85% (or higher) efficiency while delivering a 50% load, so you know you're saving energy and money on your power bills month after month. With 300W of total output power, there's plenty of juice for the most home or office situations. Featuring short circuit protection, the SeaSonic SS-300ES Bronze power supply provides the maximum reliability. And cooling is handled by an 80 mm fan.

  • newegg 80 PLUS BRONZE The 80 PLUS Bronze certified power supply provides high power efficiency of at least 82% at any load between 20% and 100%, saving you money on your electric bill, reducing heat in your computer's system, and prolonging its life
  • newegg 300W Maximum Power A maximum power of 300W delivers safe, reliable output for average computer systems.
  • newegg 80mm Cooling Fan The SeaSonic SS-300ES Bronze power supply features an 80mm fan for increased overall airflow and heat dissipation in the power supply enclosure.
  • newegg ATX 12V Compatible Compatible with the ATX12V v2.3 standard, the SeaSonic SS-300ES Bronze power supply provides maximum power stability to drive the processor as well as other system components.

Learn more about the SeaSonic USA SS-300ES Bronze

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details

Customer Reviews of the SeaSonic USA SS-300ES Bronze

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  • John K.
  • 1/1/2016 5:23:18 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsSo far, great

Pros: Extremely quiet. Fits older cases where the power supply sits at the top of the case.

Cons: Screw holes didn't quite fit. To make it work, installed a screw in one corner at a time, flexing the case to make it work. The case I was using is around 15 years old, so the hole positions might be more compatible with slightly newer cases.

Other Thoughts: My five-year-old PS was flaking out. The computer was freezing, not booting correctly, and the PS may have even been implicated in some small data loss. My prior PS was fine, but at 430W, too large. My system required between 135W (measured) and 200W (estimated from a power calculation website), so I went with this, which was one of the smallest available. It wasn't too hard to install, and it worked the first time. The fan is nearly silent.

Did you find this review helpful? Yes No

  • Rocky H.
  • 4/26/2015 8:14:49 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGood enough

Pros: works fine built a small web browsing for a friend with a i3 and a ssd 8g of ram powers everything just fine

Cons: watch your specs i thought i messed up when i got it because it only has a 4 pin cpu power wire but turns out even with an 8 pin cpu power connection on the mother board it still works so not really a con but i dont know what the other 4 pins are for cause the connections on the MB are bridged

Did you find this review helpful? Yes No

  • Mark E.
  • 1/15/2015 6:20:20 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsNo power cord

Pros: Efficient design(bronze 80). Using this to power a board with a low power CPU so I expect to be operating at the lower end of this power supplies power range. Having the bronze 80 certification means the power supply won't waste all the power I'm saving from the lower power CPU. Good price.

Cons: A power cord was not included. I wish Newegg would have more clearly stated this even though it is not shown in the pictures so I could have ordered it at the same time. Now I'll have to order one separately.

Manufacturer Response:

Hi Mark,
I am sorry but yes, no power cord is included as this unit is an OEM unit and not a specific RETAIL unit of which a power cord is included.

Did you find this review helpful? Yes No

  • Michael P.
  • 9/17/2014 1:13:28 PM
  • Ownership: less than 1 day
  • Verified Owner

1 out of 5 eggsDOA

Pros: Cheap, had all the right connectors, easy return

Cons: DOA

Manufacturer Response:

Hi Nicholas, Sorry for the DOA. All units are very well tested before leaving the factory. Perhaps it was the shipping or perhpas something else? If you have further concerns or comments, please write to us at Thank you.

Did you find this review helpful? Yes No

  • William G.
  • 8/22/2014 9:42:29 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsWorks great

Pros: did exactly what i needed it to do, had to replace a power supply in a customer case that had failed. had all of the same connections that i needed and a couple more extras for expandibility. 80 plus bronze certified

Cons: none that i experienced

Other Thoughts: had to pull the motherboard out to replace it, but was just because of the custom case that the customer had. no con here

Did you find this review helpful? Yes No

  • Kevin M.
  • 6/19/2014 5:37:06 AM
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsGood unit, but it is a wind tunnel

Pros: Seasonic with 3 year warranty
It will not explode
reasonable priced

Cons: lots of woosh noise from the wind tunnel

This unit really needs a fan speed switch, i don't think a 5/7/12v option is too much to ask for, temperature controlled would be better, but i think a switch would be cheaper

the color, nuff said

Other Thoughts: As this is not going to by my computer i am not going to bother taking the system apart and undoing my cable management, but if i ever use this unit again i am going to open it up and put at least a 50Ohm resistor on the fan's red cable (doing that will void the warranty)

Here are the fan's specs:
Model: AD0812UB-A70GL
Airflow: 43.8 CFM
Noise: 40 dBA
Speed: 4300RPM

If anyone wants to replace the fan i would suggest using a ARCTIC F8 fan
search newegg for N82E16835186074
if you under-volt that to 5v it will move plenty of air and be almost silent (by almost i mean you have to concentrate to hear it or be in a 100% silent room)

I can't find any quality units at any lower wattage, i would really like to see a 200 and 250W seasonic psu with how low power systems are becoming (would have used a 200W for this build)
When a basic Intel CPU is paired with a GTX 750/750 TI a 300W PSU is plenty and those are budget class gaming GPUs, lots of people get crazy overkill with 650W+ units for this not knowing any better.

You don't want too many watts, the 80 certificate only counts loads of 20% and up
a 300W PSU is ideal for 60-300W loads
optimizing a PSU in this way usually make very low loads much less efficient
Just cause a unit has a 80+ label does not mean it puts out quality power, any PSU below $40 is most likely very low grade that should be replaced asap

1 out of 1 people found this review helpful. Did you? Yes No

  • R R.
  • 6/10/2014 1:01:26 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

3 out of 5 eggsFirst SeaSonice DOA

Pros: Reasonably priced.
Active PFC.
High efficiency.

Cons: First one was DOA, have to pay 50% in price to return.

Other Thoughts: I've been very happy with SeaSonic supplies, this was my 5th for personal use (many others for clients). This was also my first DOA power supply. Newegg processed my RMA promptly but paying return postage and waiting to complete a build are still annoying.

Manufacturer Response:

Hi R R.
I am sorry to read of your experience. We try our best to do all the necessary quality control and it is possible that something may have happened during shipping that caused the failure. Importantly, I hope NewEgg and Seasonic USA was able to rectify your situation in a timely manner. If you have any concerns, please contact us at Thank you.

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  • Philip M.
  • 1/9/2014 11:27:50 AM
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsDOA

Pros: First one I bought worked.

Cons: Second one I bought was DOA.

Manufacturer Response:

Hi Philip, Sorry for the inconveniece, is your situation now resovled? Please let us know at Thank You

Did you find this review helpful? Yes No

  • Nicole M.
  • 12/3/2013 7:42:18 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggspfft its a seasonic

Pros: Seasonic quality and reputation. decent efficiency, pretty quite for a 80mm fan.

Cons: none

Other Thoughts: this is the second one I've ordered. works great, so did the last one but...I've been a diehard seasonic fan boy for many years now ever since the first I never used anything else and never received less than the highest quality psu. but the last one of these i ordered the 12v ran at 11.81 instead of 12.04 or so like it should. I was within the wattage but think i may have exceeded ampage. that being said this model is several several years old and has a little lower amps than a newer model

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  • Frederick G.
  • 12/1/2013 9:39:28 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGreat PSU

Pros: Great PSU as most people already know. Rock solid and all that was needed.

Cons: The cables are a little short so if you have a big case, you might need cable extenders.

Other Thoughts: Just buy it already!

Did you find this review helpful? Yes No

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Item#: N82E16817151085
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