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Item#: N82E16817151141

SeaSonic SS-1050XP3 1050W ATX12V / EPS12V 80 PLUS PLATINUM Certified Full Modular Active PFC Power Supply

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  • ATX12V / EPS12V
  • Full Modular
  • 80 PLUS PLATINUM Certified
  • 100 - 240 V 50/60 Hz
  • +3.3V@25A, +5V@25A, +12V@87A, -12V@0.5A, +5VSB@3A

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews
SeaSonic PLATINUM 1050W Modular Power Supply



Ultra Tight Voltage Regulation
Improved load voltage regulation keeps the voltage fluctuations on the 12V output within +2% and 0% (no negative tolerance), and on the 3.3V and 5V outputs between +1% and -1%, which (under 80 Plus load conditions) results in smooth and stable operation.


Seasonic Hybrid Silent Fan Control - S²FC & S³FC*
The industry first, advanced three-phased thermal control balances between silence and cooling. The Hybrid Silent Fan Control provides three operational stages: Fanless, Silent, and Cooling Mode. In addition, there is a switch provided to allow for manual selection between the Seasonic S²FC (fan control without Fanless Mode) and the S³FC (fan control including Fanless Mode).


New feature - Hysteresis - is achieved by a fan control IC, which optimizes how frequently the fan switches on and off. At 77°F (25°C) ambient temperature the fan turns on when the load rises above 35% (±5%) and it turns off when the load drops below 25% (±5%). Due to this lag in response the fan switches on and off less frequently, which reduces power loss in Fanless and Silent Mode.


Dual Copper Bars
These pure copper bars conduct high current more efficiently to reduce impedance and minimize voltage drop.


80+ Platinum
The Platinum Series, certified in accordance to the 80PLUS highest standards, offers the newest technology and innovation for performance and energy savings with up to 92% efficiency and a true power factor of greater than 0.9PF.

Special Features
SS-1050XP3 SS-1050XP3
  • 1. 80PLUS® Platinum Certified Super High Efficiency
  • 2. DC Connector Panel with Integrated VRM (Voltage Regulator Module)
  • 3. DC to DC Converter Design
  • 4. Dual Copper Bars
  • 5. Active Power Factor Correction (99% PF Typical)
  • 6. Conductive Polymer Aluminum Solid Capacitors
  • 7. Highly Reliable 105°C Japanese Aluminum Electrolytic Capacitors
  • 8. Gold Plated High Current Terminals
  • 9. Ultra Tight Voltage Regulation
  • 10. High +12V Output
  • 11. Dual Sided PCB Layout
  • 12. Seasonic Patented Hybrid Silent Fan Control
  • 13. Sanyo Denki San Ace Silent Fan
  • 14. Ultra Ventilation [Honeycomb Structure)
  • 15. Full Modular Cabling Design
  • 16. Multi-GPU Technology Support
  • 17. All-in-One DC Cabling Design
  • 18. Easy Swap Connector
  • 19. Universal AC Input [Full Range)
  • 20. 7-Year Warranty
Product Information
Model Platinum-1050 (SS-1050XP³ Active PFC F3)
Intel Specifications ATX12V / EPS12V
Dimensions (L x W x H) 7.4 x 5.9 x 3.3 in. (190 x 150 x 86mm)
Efficiency 80 PLUS Platinum / Energy Star / ErP Lot 6 2013 compliant
Protection Features OPP/OVP/UVP/SCP/OCP/OTP
Hazardous Materials WEEE/RoHS
AC Input Range Full Range: 100 ~ 240V (Max. 90 ~ 264V), 13-6.5A, 50/60Hz
  • MB 24/20-Pin Connector x 1 (610mm)
  • CPU 8/4-Pin x 1 (650mm)
  • CPU 8-Pin x 1 (650mm)
  • PCI-E 8/6-Pin x 8
  • Peripheral 4-Pin x 5
  • SATA x 14
  • Aux. x 1
DC Output Voltage +3.3V +5V +12V -12V +5Vsb
Maximum Load 25A 25A 87A 0.5A 3A
Combined Load 125W 1044W 6W 15W
Total Output 1050W

In the Box


Learn more about the SeaSonic USA SS-1050XP3

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 7 years
  • Limited Warranty period (labor): 7 years
  • Read full details

Customer Reviews of the SeaSonic USA SS-1050XP3

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  • Anonymous
  • 9/19/2015 1:55:41 AM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsScrew Loose!!

Pros: I've bought Seasonic PSU before, they are quite, cool and reliable.

Cons: This product was delivered with a loose screw in the PSU that bounced around the when the case was moved it rocked.

I was able to remove the fan cover and shake the screw out.

I hope it is an extra screw and is not required to hold one of the large capacitors in place; which could now move and hit soothing near by and cause a short, or worse a spark/fire.

Other Thoughts: If Newegg allowed photos to be uploaded with reviews I could show that the screw was not from the other system components (MB, Case etc) as it was a different size with a washer.

Manufacturer Response:

Hi, I am very sorry for this issue!!! Please note, the product has full safety protocols so if there are any issues, the safety features will kick in to prevent damage to your system. Can you please write to: with your product serial number? We would like to inform our quality department. Thank you very much.

Did you find this review helpful? Yes No

  • Chris F.
  • 8/7/2015 8:20:17 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggs

Pros: Pretty nice power supply bought for a friend of mine and it had has a good amount of modular cables but the best part was it came with a bag to store all the extra cables that it wasn't in use.

Cons: none really.

Did you find this review helpful? Yes No

  • mike h.
  • 7/18/2015 2:00:45 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

2 out of 5 eggsI would not buy another

Pros: havent tested it yet

Cons: I was thoroughly disappointed after opening the box and seeing all the
cables supplied. There were all BLACK! Every power supply I have
ever purchased has used color coded wires. That affords the ability to
see what wires are what. Why would you they do that. I see no advantage to it. The only benefit I see is for them in that it makes it easier to make and no doubt cheaper.

The ironic thing is that on their web page that shows how to use a test jumper the cpu power cable is colored

Other Thoughts: And getting support is horrendous.

They publish an email address in their
"commitment to quality" insert. This DOESNT work. And the email in
the user manual is also junk. And so is which they publish on the seasonicusa website. And the email on their contact page is also not working. FOUR emails address that dont work! How bad is that?

Manufacturer Response:

Hi Mike, I am sorry for the inconvenience. The black cable is actually more preferred by customers to match the very common black cases and as well, this not a cost down because the making of the cables is actually more difficult. As for the PSU test procedure, please use the pin position in relation to the connector lock.
As for the support e-mail issue, I am sorry about the e-mail problems and we will double check our system to make sure all the e-mails listed are correct and working properly. If you have any questions, please write to me at: (this mail works!) Thank you.

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

  • Eric T.
  • 5/15/2015 11:30:27 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsI love it!

Pros: Modular, fanless mode, quiet.

Cons: Length? But most kilowatt PSUs are long.

Other Thoughts: Bought it for the hybrid fanless mode, which works great!

It's silent like the rest of my machine's fans until I start gaming, but by then my speakers drown it out.

I've been using SeaSonic PSUs for years, and I've never had a bad experience with one.

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

  • Darrel J.
  • 5/6/2015 6:28:51 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsUpdated Review - Power Socket Issue

Pros: Nice Layout, Fully Modular

Cons: None - With the replacement unit

Other Thoughts: This is an update to my review from 3/21/2015.

I returned the malfunctioning PSU for a refund and placed an order for the same model PSU for the sake of speed. I swapped the PSU, but I used the cables I had already installed in the case that came with the malfunctioning PSU (including the AC Cord). After installation, I made sure the AC socket did not exhibit the same problem. It's been about six weeks and I have not had any issues.

3 out of 3 people found this review helpful. Did you? Yes No

  • Darrel J.
  • 3/21/2015 12:49:58 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggsPower Socket Issue

Pros: Nice Layout, Fully Modular

Cons: I have the exact same issue as Thomas D. (review from 1/22/2015). The system shut down. While examining the system, I made sure that the power cable was properly seated. When I touched the power cable near the socket on the PSU, it made an electronic crackling sound. When I adjusted the cable, the system would briefly energize. I tried different power cords with the same result.

Other Thoughts: I requested a refund RMA and ordered a new PSU of the exact same model. I really do not want to rip the wires out of the case, and I'm hoping the new PSU does not have the same problem. I will update the review after I install the new PSU and after a proper burn-in period.

Manufacturer Response:

Hi Darrel, I am sorry for the inconvenience. This issue sounds like a faulty AC Cord and not necessarily the socket itself. If you have any questions or concerns, please contact us at Thank You

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

  • MARIA R.
  • 3/8/2015 9:31:18 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsheavy beast

Pros: this replaced a noisy TX850 from corsair that kept triggering power surge sensors on the motherboard and restarting the system.

my overclocks have seen increases that would have shut down the other power supply. stability is really underrated and this unit provides it. im not a PSU expert or electrical engineer but the thick and clean insides and the sheer weight of this unit compared to my previous psu is very apparent. my graphics card is louder than this unit. modular layout means minimal amount of cabling, looks neat and simple

Cons: price. i bought this while it was on a huge discount

Other Thoughts: i dont know why people are buying so much channelwell rebranded garbage

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

  • Ed R.
  • 1/23/2015 3:45:12 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsThe best PS? - maybe

Pros: One of the critical components in any electronics is having a stable, clean power supply. This one is very well built, and in my initial looking is very clean and stable. The power supply comes with high quality cables - and lots of them.

When you first un-package this device, you feel like you got a gift, not a power supply. These guys spent a great deal of time and thought on shipping, and packaging to ensure it arrives safe and in good shape. They also took care of "what to do with the extra cables" issue. you really don't want to discard them in the case you need them later, but hate to store unused stuff and become a hoarder. Their solution isn't perfect, but helps

Cons: none

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

1 out of 5 eggsWorked for 2 days

Pros: It worked for 2 days

Did not burn my house down

Cons: It died right in front of my and my client.

There seems to be a short somewhere near the input socket. Moving the plug around on 3 different cords cause power to come back on for a few seconds

Other Thoughts: I order from newegg every week, sometimes several times a week.
This supply is going in a $4K system for a client and it failed right in front of both of us.

The only saving grace here is NewEgg offered an advanced replacement option in this case.

I have installed and own many platinum and gold rated Seasonic power supplies and this is the first bad unit for me.

Manufacturer Response:

Hi Thomas, I am very sorry for the inconvenience. Can you please kindly write to us at and let us know what happened so we can report this to our HQ. We have many quality checks in place at our factory and we want to make sure everything is in working order. Thank you very much.

Did you find this review helpful? Yes No

  • Kyle H.
  • 12/25/2014 8:10:42 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsThe Cadillac

Pros: You can tell from the packaging that they care about their product. This PSU is obviously quality built and high-end, with the best energy efficiency rating you can get. I don't expect to need to utilize the warranty that came with this.

Cons: I probably would have been reluctant to buy this at normal price.

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

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Item#: N82E16817151141
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