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Item#: N82E16817151108

SeaSonic M12II 850 SS-850AM 850W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Full-Modular Active PFC FULL-modular Power Supply New 4th Gen CPU Certified Haswell Ready

  • ATX12V / EPS12V
  • Full-Modular
  • 80 PLUS BRONZE Certified
  • 100 - 240 V
  • +3.3V@25A, +5V@25A, +12V@70A, -12V@0.5A, +5VSB@3A
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.
IronEgg
BUY WITH CONFIDENCE
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
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Seasonic M12II Bronze Series has been the ever-popular power supply series of the semi modular category. Now Seasonic extends the semi-modular series by introducing M12II Bronze 650/750/850 to provide consumers a larger selection in the entry level 80PLUS Bronze certified category.

The M12II Bronze new models have built in a full protection feature including OCP, OPP, OTP, OVP, SCP & UVP and meet worldwide safety and environmental standards. The all-new M12II-650/750/850 units are the new leaders in the 80 PLUS Bronze category and another great addition to the Seasonic Retail power supply family.

  • newegg 80 PLUS Bronze Certified The M12II Bronze Series achieves the 80 PLUS Bronze standard of at least 82%, 85% and 82% efficiency under 20%, 50% and 100% operating loads respectively. Combined with Active Power Factor correction (Active PFC), the M12II Bronze reduces energy waste, boosts power efficiency and more importantly, helps the users to save energy and reduce electricity bill.
  • newegg Ample +12V Outputs The SeaSonic M12II 750 SS-750AM power supply delivers 750W of continuous output, with single, high-power +12V single rail to ensure the maximum provision of 12V power to CPUs and GPUs. DC to DC Converter Design ensures superior dynamic response & greater system stability, while Active Power Factor Correction [99% PF Typical] reduces line loss and power distortion.
  • newegg Japanese Brand Capacitors (105°C) The PSU utilizes highly reliable Japanese brand capacitors for exceptional stability and product lifespan.
  • newegg Silent Cooling The 12cm ball bearing fan provides superior cooling performance to dissipate heat in the power supply enclosure while running whisper-quiet. Intelligent thermal control balances noise and cooling. Soft-mount rubber cushions reduce fan rotation and vibration noise. Plus, the universal ventilation (honeycomb structure) minimizes airflow resistance for maximum cooling efficiency.
  • newegg NVIDIA SLI Certified This PSU has gone through a series of rigorous NVIDIA SLI certification tests for maximum system stability when building NVIDIA SLI PCs.
  • newegg Detachable Modular Cables Semi-modular cable design helps reduce cable clutter thus resulting in improved internal airflow. Easy Swap connectors allows for easy, quick and safe unplugging.


Learn more about the SeaSonic USA SS-850AM

Model

Brand
SeaSonic
Model
SS-850AM
Series
M12II 850

Spec

Type
ATX12V / EPS12V
Maximum Power
850W
Fans
1
PFC
Active
Main Connector
20+4Pin
+12V Rails
Single
PCI-Express Connector
4 x 6+2-Pin
SATA Power Connector
8
SLI
SLI Ready
Haswell Support
Certified
CrossFire
No
Modular
Full Modular
Efficiency
82%
Energy-Efficient
80 PLUS BRONZE Certified
Over Voltage Protection
Yes
Input Voltage
100 - 240 V
Output
+3.3V@25A, +5V@25A, +12V@70A, -12V@0.5A, +5VSB@3A
Dimensions
6.30" x 5.91" x 3.39" (L x W x H)
Weight
9 lbs.

Features

Connectors
1 x 20 / 24P Main Power
1 x EPS12V / ATX12V (8P / 4P)
1 x EPS 12V (8P)
4 x PCI-E (6P / 8P)
8 x SATA
5 x Peripheral (4P)
2 X FDD (4P)
Features
DC to DC Converter Design

High Reliable 105? Japanese Brand Capacitors

Ample +12V Outputs

Active Power Factor Correction [99% PF Typical]

Smart & Silent Fan Control [S2FC]

12cm Ball Bearing Cooling Fan

Soft-Mount Rubber Cushions

Multi-GPU Technologies Supported

Detachable Modular Cables

Easy Swap Connectors

Universal Ventilation [Honeycomb Structure]

5 Year Warranty

Quick Info

Warranty

  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years


Customer Reviews of the SeaSonic USA SS-850AM

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Showing 29 of 29 reviews - Clear Filters

  • Jakey P.
  • 6/24/2014 5:56:33 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

1 out of 5 eggs

This review is from: SeaSonic M12II 850 SS-850AM 850W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Full-Modular Active PFC FULL-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Nice cables.

Cons: DOA, which I was unable to determine until after installing, routing, and grouping all of the cables, which I then had the fun job of undoing in order to RMA this. $2k+ build, and it's worthless until I can get a working PSU. One egg until my new one is here, and probably no higher than a 3 for all the trouble a defective unit causes.

Manufacturer Response:

Hi Jakey, sorry for the inconvenience. Please do let us know how the RMA process has gone for you. Please write to: newegg@seasonicus.com Thank you.

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

  • Robert C.
  • 6/23/2014 11:49:59 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsVery Good Performance

This review is from: SeaSonic M12II 850 SS-850AM 850W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Full-Modular Active PFC FULL-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: I used the SeaSonic M12II 850 watt supply in my latest build and it has performed flawlessly. My new ASUS Maximus Hero (I-7 Haswell) system came up fine the first time and this power supply has handled the power requirements without flinching. I love the modular system for cables and the end result after installation is a very clean layout with only the cables you need present.

Cons: The only knock on this supply will probably not be of concern to most people but it was an issue at my location. The computer that the supply is installed in is used with a software defined radio. One of the requirements for use with an SDR is that the components need to be well filtered for RF emissions across the HF spectrum. I found the SeaSonic to be an emitter of RF oscillations at 60 KHz intervals from below the AM broadcast band to 30 MHz. This is an indication that the AC primary line is not de-coupled (flitered) adequately for RF. Note that a comparable Corsair 800 watt supply was perfectly clean in this regard. It was not difficult to overcome this shortcoming by utilizing an external common-mode AC line filter but for FCC emission compliance this really should be done by the manufacturer with internal components.

Other Thoughts: This appears to be a very solid power supply and a reliable performer.

Did you find this review helpful? Yes No

  • Brian C.
  • 5/12/2014 9:28:29 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsSimply the best

This review is from: SeaSonic M12II 850 SS-850AM 850W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Full-Modular Active PFC FULL-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: This PSU is superb as are all the PSU's made by SeaSonic. It is quite and provided more than enough amps to push whatever you want to cram your computer with. What's more is that it does so with almost non existent current ripple and exceeds its listed specifications

Cons: Didn't come with a pearl red metal flake power coating. But nothing does.

Other Thoughts: Before buying any power supply check real power supply reviews at Hardware Secrets. You will see why spending a little more is well worth it.

Did you find this review helpful? Yes No

  • Anonymous
  • 4/18/2014 8:08:55 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsPunk'd by Seasonic - No Rebate

This review is from: SeaSonic M12II 850 SS-850AM 850W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Full-Modular Active PFC FULL-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Product seems to work well.

Cons: Complied with rebate instructions to the letter. Got notice of invalid UPC. Apparently I'm smart enough to send in the right documents, but dumb enough to get played by Seasonic's rebate scam.

Buy their product if you wish, but prepare to pay sticker.

I build often, both for friends and my own. For this recent build I received my other rebates from ASUS and PNY no problem. Seasonic couldn't make it happen. So Seasonic, that makes you incompetent, or willful criminals.

Cheers to Seasonic's wiz-kid in Finance that came up with the "cheat our customers" business plan. The $20 you kept from me (and I presume many others that don't take this seriously) will keep me from buying Seasonic in the future.

Manufacturer Response:

I am sorry for your rebate experience and the invalid UPC. Please send to me your proof of purchase, model and serial number to: newegg@seasonicus.com and I will ask our USA office to investigate this issue as soon as possible.
As reference to UPC, perhaps there has been a mix up between UPC and Serial Number? Thank you.

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

  • Matthew B.
  • 4/3/2014 2:55:57 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsVERY Quite make me VERY happy :)

This review is from: SeaSonic M12II 850 SS-850AM 850W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Full-Modular Active PFC FULL-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Im using this on a Lian Li Pitstop T60 Test Bench so having a near silent PSU and Full Modular was a must. After doing my research and comparing prices and features, this Seasonic fit the bill perfectly. There are a
lot of PSUs out there that claim to be "silent" running and are far from it.. This M12II is a great example of a PSU that delivers what it says. Being my first Seasonic I am pleasantly surprised. It is almost completely silent all the way up to about 65% fan speed and very tolerable even under full load. And that's on an open air test bench where I can literally hear everything. The Modular cables are 100% Black and most of them are Flat Cables which makes organizing them very manageable. I haven't had any length issues. This is a steal at $129 given all of its perks and being a quality name brand like Seasonic.

Cons: Ive only had it a few days so none so far.

Other Thoughts: I did you research for you.. Quality Brand, Modular, Flat Cables, 850w and SUPER QUIET for $129! You cant go wrong here.

Did you find this review helpful? Yes No

  • Dominic T.
  • 3/20/2014 6:26:41 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

3 out of 5 eggsDisappointing

This review is from: SeaSonic M12II 850 SS-850AM 850W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Full-Modular Active PFC FULL-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Pretty solidly built, as expected from SeaSonic.

Black sleeving on the cables is well done.

Decent amount of connectors supplied.

Cons: I did NOT receive a fully modular PSU as described. I received a semi-modular one which is not acceptable. I tried to resolve this with Newegg and it was the first time I have ever been let down by their support.

The cables for the 6/6+2 PCIe don't provide enough cable between the two connectors so they need to be bent severely to connect to a video card that requires both connectors.

The 6+2 connectors/wiring is poorly done and the +2 part doesn't line up correctly on one of the cables.

The size of the PSU itself is odd. It is too large for a number of cases.

Other Thoughts: It is a solid PSU but it just falls short in a few areas I would have never expected a SeaSonic power supply to miss on. Receiving the semi-modular model was also a major letdown since it is clearly labeled as a full modular PSU.

Manufacturer Response:

Hi Dominic, I am sorry about the confusion between full modular and semi modular. This may have been a stock issue at NewEgg and I am sorry it is not resolved to your sastisfaction. Please e-mail me at newegg@seasonicus.com and let me know if the situation has worked out or not. As for the size of the PSU, our platforms have some of the smallest footprints in the industry and if you need something of a smaller metal case, then possibly you will need to look at a unit smaller than 850w. Thank you.

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

  • Nathan F.
  • 2/7/2014 7:56:53 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsWorks Good

This review is from: SeaSonic M12II 850 SS-850AM 850W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Full-Modular Active PFC FULL-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Well, she purrs like a kitten, and supplies plenty of power, I got the 850w so I can do whatever I want in the future and not have to worry, also; power supplies are at their best when they run at 40-60% so keeping it right in the middle is key. Seasonic is the best and now this baby has a 5-yr warranty (paper was in the box) even though originally it said 3. So, good warranty, good components, quite, and not bad at cable management (mostly my haf 932).

Cons: Only that it's not "fully" modular, the cable are a little stiff, but I got it to work fine.

Other Thoughts: I got this for $99.99 when it was on sale, and I couldn't be happier, enjoy. Also the HAF 932 is an awesome case! I don't care what anyone says, everyone has their own conflicting opinion, it never ends, it's like jail where everyone's a lawyer.

Did you find this review helpful? Yes No

  • Chris P.
  • 1/15/2014 5:20:13 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsit works as it should

This review is from: SeaSonic M12II 850 SS-850AM 850W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Full-Modular Active PFC FULL-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: works just fine with a 6 core and 460gtx
good value and certified

Cons: none so far

Did you find this review helpful? Yes No

  • Matthew W.
  • 1/3/2014 7:20:24 AM
  • Tech Level: Average
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsGreat PSU

This review is from: SeaSonic M12II 850 SS-850AM 850W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Full-Modular Active PFC FULL-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Works well, doesn't get hot. This PSU seems to have a bunch of connectors for all kinds of things. Probably more than I need.

Cons: none

Other Thoughts: For a not real known PSU brand, I am quite happy with the quality and performance of this PSU. Good choice.

0 out of 4 people found this review helpful. Did you? Yes No

  • Ryan J.
  • 12/8/2013 11:15:45 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggs

This review is from: SeaSonic M12II 850 SS-850AM 850W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Full-Modular Active PFC FULL-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Works great. Locations of plugs worked great for organizing everything. My first semi-modular power supply and I am very pleased with the outcome.

Cons: The cables are flexible enough, but the ends of the PCI-E cables are a bit rigid. I had to be clever about how I routed the cables to my video card, ATI HD 6950, because the wires stick up off the card to the degree that I was unable to close my case at first. Not a big deal, but it is the reason I do not give it 5 stars.

Manufacturer Response:

Hi, the cable ends can be a bit stiff at times. The best solution is to use a hair dryer on low heat to warm up the cables before usage. Thank you.

Did you find this review helpful? Yes No

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