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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

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

SeaSonic S12G Power Supply

The S12G Series, available in 450, 550, 650 and 750 Watts, provides superior dynamic response, greater system stability, and maximum 12VDC rail output. The 80 PLUS Gold certified power supply provides high power efficiency of at least 87% at any load between 20% and 100%, saving you money on your electrical bill, reducing heat in your hardware, and prolonging your computer's life. Intelligent thermal control ensures an optimal balance between silence and cooling.


Features

SeaSonic S12G
  • DC to DC Converter Design
  • Conductive Polymer Aluminum Solid Capacitors
  • Highly Reliable 221°F (105°C) Aluminum Electrolytic Capacitors
  • Smart and Silent Fan Control (S2FC)
  • Active Power Factor Correction (up to 99%)
  • Ample +12V Output
  • 120mm Ball Bearing Cooling Fan
  • Multi-GPU Technology Support
  • Ultra Ventilation (Honeycomb Structure)
  • Gold Plated High Current Terminals
  • Soft-Rubber Mounting Cushions
  • Universal AC Input (Full Range)
SeaSonic S12GSeaSonic S12G

Product Information

1. Dimensions (L x W x H): 5.5 x 6 x 3.3 inches (140 x 150 x 86mm)

2. AC Input & DC Output Voltages / Wire Configuration


Model: S12G-450

SeaSonic S12G


Model: S12G-550

SeaSonic S12G


Model: S12G-650

SeaSonic S12G


Model: S12G-750

SeaSonic S12G



Safety

SeaSonic S12G


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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  • Trevor W.
  • 4/29/2016 9:30:06 AM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsQuiet Simplicity (does not work on badgers)

Pros: SeaSonic cares about their products, as evidenced by their meticulous packaging, attention to detail and warranty.
Super quiet fan, is it on? I had to put my hand up to it to tell!
Cables are attractive and come with multiple Zip Ties, hook and loop fasteners, bolts, and a sticker along with the requisite power cord.

Cons: Umm...it does not...levitate or protect from badgers?

Other Thoughts: I would recommend this to people who do not need their PS to levitate or to fight off badgers.

Did you find this review helpful? Yes No

  • connor a.
  • 3/20/2016 10:47:06 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsVery high quality

Pros: I was looking for a reliable power supply on a budget, since it was my first build, modular wasn't really a necessity. This thing has survived through thunderstorms and it still works perfectly!

Cons: N/A

Other Thoughts: Buy it now

Did you find this review helpful? Yes No

  • Matthew B.
  • 3/14/2016 1:46:32 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat for small cases.

Pros: Not too many cables, and I enjoyed working with the flat cables. It's quiet and cool.

Cons: No cons so far, I hope it lasts!

Other Thoughts: I purchased the 550W version so that I wouldn't be wasting energy in my single GPU system. Even if I get a 980Ti I won't use more than 500 watts.

Did you find this review helpful? Yes No

  • 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!

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

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

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

Did you find this review helpful? Yes No

  • 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

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.

4 out of 4 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

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
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsEfficient and Reliable

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.

Did you find this review helpful? Yes No

  • 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.

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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SeaSonic USA > 
Item#: N82E16817151136
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