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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

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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 12 of 12 reviews - Clear Filters

  • Robert C.
  • 1/8/2016 8:49:18 AM
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsQuality at a Reasonable Price--But it's NOT Modular!

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

Pros: - Quiet
- Slightly smaller case, which is why I bought it for a micro-ATX build

Cons: - This is Newegg's fault: one of the pictures for this 550W version states "Modular Power Cables," but they are not. No where in the specs do they identify this as a non-modular PSU. I should have caught that this was an error since the 450 and 650 versions correctly show as non-modular units, but come on, Newegg, show the specs correctly.

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  • Jimmy H.
  • 8/27/2015 5:48:20 PM
  • 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

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  • Robert S.
  • 8/20/2015 5:22:23 PM
  • 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
  • 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.

2 out of 2 people found this review helpful. Did you? Yes No

  • Robert D.
  • 7/17/2015 8:15:44 PM
  • 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!

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  • Roy R.
  • 6/25/2015 6:34:15 PM
  • 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
  • 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

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  • Joel B.
  • 6/3/2015 8:55:01 AM
  • 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
  • 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

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  • Louis D.
  • 7/7/2014 3:39:38 PM
  • 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

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Item#: N82E16817151136
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