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SeaSonic USA > 
Item#: N82E16817151136

SeaSonic S12G S12G-550 550W ATX12V / EPS12V 80 PLUS GOLD Certified Active PFC Power Supply

  • ATX12V / EPS12V
  • 80 PLUS GOLD Certified
  • 100 - 240 V 50/60 Hz
  • +3.3V@20A, +5V@20A, +12V@45A, -12V@0.3A, +5Vsb@2.5A

IronEgg
BUY WITH CONFIDENCE
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
BUY WITH CONFIDENCE
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
BUY WITH CONFIDENCE
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the SeaSonic USA S12G-550

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years
  • Read full details

Customer Reviews of the SeaSonic USA S12G-550

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Showing 11 of 11 reviews - Clear Filters

  • Kevin H.
  • 8/27/2015 5:48:20 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat

This review is from: SeaSonic S12G S12G-550 550W ATX12V / EPS12V 80 PLUS GOLD Certified Active PFC Power Supply

Pros: Silent and efficient.

Cons: None

Did you find this review helpful? Yes No

  • Robert S.
  • 8/20/2015 5:22:23 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

5 out of 5 eggs

This review is from: SeaSonic S12G S12G-550 550W ATX12V / EPS12V 80 PLUS GOLD Certified Active PFC Power Supply

Pros: none

Cons: none

Other Thoughts: its one of the least exciting things I received for the amount I paid for it but it does the job , doesn't make a lot of noise, and for being non modular , there's a lot less excess cables then the corsair vx 550 I bought in 2010 which still works, and I like the flat cables versus having them all sleeved

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  • Sven T.
  • 7/28/2015 11:43:52 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsSuperb power supply... one point to improve

This review is from: SeaSonic S12G S12G-550 550W ATX12V / EPS12V 80 PLUS GOLD Certified Active PFC Power Supply

Pros: Where to start... lots of connectors, ultra-quiet operation, voltages are within 1% of direct spec... SUPER HEAVY... there is really nothing I do not like about the product (with one item)... 5 YEAR WARRANTY

Cons: Sea Sonic really needs to address one item. As today most cases are bottom mounted, the SATA power plugs need to be inverted on the cable 180deg. If you have a case where the power supply mounts on top, it is perfect.... While this does not impact functionality, it does require much greater care with cable management.

Other Thoughts: I have been building computer since 1988... 27 years is a VERY long time. Probably not many of you will remember the 8088... mine was a blistering 4.77mhz (not ghz) with 1 wait-state, and 640K RAM of 180ns memory (DDR3-PC12800 is tens-of-thousands of times faster)... This Sea Sonic power supply is the best I have ever used. Normally I would recommend Antec or Corsair, but this Sea Sonic PS is better. AMAZING build quality - AMAZING warranty

Manufacturer Response:

Hi Sven, Thank you for your valuable feedback. I will forward this to our PM and I hope they will take this in to consideration. If you have any questions or concerns please contact us at: newegg@seasonicus.com Thank you.

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

  • Robert D.
  • 7/17/2015 8:15:44 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

5 out of 5 eggsVery Good PSU

This review is from: SeaSonic S12G S12G-550 550W ATX12V / EPS12V 80 PLUS GOLD Certified Active PFC Power Supply

Pros: Silent operation and cable length.

Cons: None

Other Thoughts: PSU came shipped in great condition. I do not have any issues with the fans sounding strange. Amazing PSU!

Did you find this review helpful? Yes No

  • Roy R.
  • 6/25/2015 6:34:15 PM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsEfficient and Reliable

This review is from: SeaSonic S12G S12G-550 550W ATX12V / EPS12V 80 PLUS GOLD Certified Active PFC Power Supply

Pros: I heard about this PSU and its outstanding efficiency from an Anandtech review. The numbers impressed me and the cost of the unit was very reasonable, considering it is a Gold-rated power supply built by Seasonic. I've had it for almost a year and haven't worried about it once. It does its job and does so quietly.

Cons: None that I can think of. The cables were long enough and reached all necessary components in my Corsair SPEC-03 case.

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  • Anonymous
  • 6/25/2015 1:57:53 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsPower supply good. Rebate ... what rebate.

This review is from: SeaSonic S12G S12G-550 550W ATX12V / EPS12V 80 PLUS GOLD Certified Active PFC Power Supply

Pros: Power supply completely solved my system's instability.
It is quiet and cool.

Cons: rebate - do not expect it. This is the first time I have not received my rebate from any company on NewEgg.

Other Thoughts: I replaced an Antec 520 with this Seasonic after only 4 years. My machine rarely even draws over 300W, and it cannot draw 400W (measured at the wall). The Antec would cause resets on cold boot, made strange noises over 250W, and caused cpu errors (Prime95 would report errors, file downloads would get corrupted... etc). After replacing it with this Seasonic, all those problems have vanished.

Wattage ratings are worthless

Did you find this review helpful? Yes No

  • Joel B.
  • 6/3/2015 8:55:01 AM
  • Tech Level: Average
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsOutstanding for the price

This review is from: SeaSonic S12G S12G-550 550W ATX12V / EPS12V 80 PLUS GOLD Certified Active PFC Power Supply

Pros: Very compact. Made with high quality components, no junk caps like a lot of lower end power supplies. Well protected.

Cons: Not modular - but you knew that, right? Also probably a step below the Seasonic X or G series, but still far better than most other supplies in this class.

Other Thoughts: This Seasonic power supply has been great so far. Compact, plenty of power to drive any of the current Maxwell GTX cards (except the brand new 780ti).

Also, my son accidentally tested the short circuit protection by hooking up the 4-pin +12v connection wrong; the Seasonic refused to power on and prevented possible damage to the motherboard and other components.

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

  • Alejandro T.
  • 5/28/2015 9:50:40 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

5 out of 5 eggsJust as it should

This review is from: SeaSonic S12G S12G-550 550W ATX12V / EPS12V 80 PLUS GOLD Certified Active PFC Power Supply

Pros: seasonic is a trusted brand, this psu has a gold rating so thats never bad
a quality product with all the connectors you would need. i was satisfied with the price it was worth it.

Cons: none really,the only thing i could complain about it the wire toughness but it can be made malleable with a blow-dryer quick.

Other Thoughts: you can tell by the weight that its a good product. and you would never regret a seasonic

Did you find this review helpful? Yes No

  • Louis D.
  • 7/7/2014 3:39:38 PM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

5 out of 5 eggsExcellent power supply.

This review is from: SeaSonic S12G S12G-550 550W ATX12V / EPS12V 80 PLUS GOLD Certified Active PFC Power Supply

Pros: Good price, works well, and quite. I have no problems at all.

Cons: None I love it!

Other Thoughts: If I need another power supply I will make sure it is a SeaSonic. I am very impressed with this product. I would recommend it to everyone.

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

  • Anonymous
  • 12/28/2013 12:44:55 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

2 out of 5 eggsNot impressed

This review is from: SeaSonic S12G S12G-550 550W ATX12V / EPS12V 80 PLUS GOLD Certified Active PFC Power Supply

Pros: Efficient

Not deep

Cons: Loud. The fan, even at idle, makes a scratchy/buzzy noise that can be heard across the room

The flat cables are difficult to route, and difficult to rotate

Other Thoughts: Based on reviews, the fan doesn't even kick up to 500RPM until there is a hefty load on it, but it is much louder than my last several PSUs, all of which have been either S12, S12II, or rebranded S12II platform PSUs. For the cost, I expected much better noise characteristics, and not to have a nightmare of cable routing..

Manufacturer Response:

Hi, I am sorry to read about your experience with the fan noise. Please note the S12G series have a more conservative fan curve meaning it will be kick in earlier to keep the PSU cool. If you wish to have less noise from the fan, then please have a look at our X or P series where the fan control curve is more aggressive.

As for the cabling, it is possible the cables when cold, will be stiffer. Please use a hair dryer and warm up the cables before the installation process. This should help your system build process. Thank you.

5 out of 9 people found this review helpful. Did you? Yes No

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Item#: N82E16817151136
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