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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
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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 650 SS-650AM power supply delivers 650W 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 allow for easy, quick and safe unplugging.

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


Customer Reviews of the SeaSonic USA SS-850AM

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Showing 24 of 24 reviews - Clear Filters

  • James S.
  • 3/31/2014 10:17:34 AM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsNice product

This review is from: SeaSonic M12II 650 SS-650AM 650W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Semi-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Nice powersupply, sleeved cables, semi-modular and decently priced.

Cons: None

Other Thoughts: Wish the non-modular cables were a bit longer so I could do some better cable management, but everything works great so far. Hoping it lasts over 5 years like my Corsair TX750 did.

Did you find this review helpful? Yes No

  • Tyler V.
  • 3/14/2014 6:44:46 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsFantastic

This review is from: SeaSonic M12II 650 SS-650AM 650W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Semi-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Modular design allows you to only use the cables you need making for less mess in the case
Its very quiet as well

Cons: None that I have found so far.

Other Thoughts: Would buy this brand again for all future builds

Did you find this review helpful? Yes No

  • Daniel B.
  • 3/14/2014 6:22:12 AM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsGreat PSU

This review is from: SeaSonic M12II 650 SS-650AM 650W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Semi-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Booted right up no problems, Runs very low temps and quiet, and its modular!

Cons: None

Other Thoughts: Running a Gtx 750 Ti and a FX-8350 in an Apevia Xplorer2 case.

Did you find this review helpful? Yes No

  • Jesse D.
  • 2/27/2014 3:29:37 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsTerrible RMA

This review is from: SeaSonic M12II 650 SS-650AM 650W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Semi-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: I wouldn't know

Cons: Installed this immediately after receiving it, ran fine for about 2 hours, turned my monitor off and went to bed. Upon waking up, I find my computer shut off, I powered it back on, just for it to power itself off after 3 seconds. It never would power up again. Naturally I looked into getting it returned, just to find Seasonics RMA process is a NIGHTMARE. No clue if the product is bad itself or if I just received a damaged part, but due to this experience and Seasonics unbelievable RMA process, they have lost my business for good.

Other Thoughts: Due your research before buying people, I didn't and I regret it.

And for the record, it was indeed the PSU that was defective, I tested it myself with the usual method with a multi-meter.

Manufacturer Response:

Hi Jesse, Sorry for the inconvenience but if the product was a DOA, then best option would have been to use the excellent NewEgg RMA service. Can you please let us know what part of the Sea Sonic RMA service you find to be not correct. Was your RMA issue resovled? Did you receive a working replacement?

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  • Anonymous
  • 2/2/2014 1:35:11 AM
  • Tech Level: Average
  • Ownership: 1 week to 1 month

4 out of 5 eggsWorks great but short cables

This review is from: SeaSonic M12II 650 SS-650AM 650W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Semi-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Works fine and hasn't caused any problems yet.
Semi-modular

Cons: The power cable that powers your cpu is kinda short. I was unable to route the cable through the side of the case to reach the connector. But the placement of the connector on my motherboard is a little weird and its been placed in a NZXT Phantom 530 full tower case. So if I used a different motherboard or used a mid-tower then it probably would've reached it.

Other Thoughts: It works efficiently and it satisfies my computer's power requirements. I believe Seasonic should extend the length of their cpu power cable because customers might have some problems when they mix certain motherboards with a full tower case.

Manufacturer Response:

Thank you for your review, in reference to the 12V CPU cable, yes, for some big towers, it might need to be longer but our 12V CPU cable is one of the longest on the market today and we have concerns that making the cable any longer may affect performance. Thank you for your input!

Did you find this review helpful? Yes No

  • Matthew B.
  • 7/20/2013 1:03:51 PM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsFalls a bit short.

This review is from: SeaSonic M12II 650 SS-650AM 650W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Semi-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Does its job, looks alright.

Cons: Cables are very short, leaving little (if any) in the way of cable management.

Other Thoughts: While it's not necessarily bad, I wouldn't demand this particular one unless it was on sale for a fairly low price due to its short cable length.

Did you find this review helpful? Yes No

  • Meichun L.
  • 6/21/2013 7:47:17 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsLoud PSU

This review is from: SeaSonic M12II 650 SS-650AM 650W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Semi-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Semi-modular, reasonably priced PSU from a reputable brand

Cons: The fan can be extremely LOUD from time to time. It's a shame. Even my old $30 PSU is much quieter than this. I changed to a quieter fan and now it's working fine--but I won't get warranty any more.

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  • Donald H.
  • 6/15/2013 11:08:41 PM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsPerfect power supply

This review is from: SeaSonic M12II 650 SS-650AM 650W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Semi-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: This is a great power supply.I have been running it maxed out 24,7 a day sense I got it.I have a Amd 8 core processor and 2 Amd 7970 graphics card 5 hard-drives.I have it folding@home 24 seven and no problems at all.This one is
a lot better than the 620 watt bronze which is based on older platform.They look the same but the 620 M12II has one Japanese capacitor and E.M. Coils for it.s regulator.This model has all Japanese capacitors and D.C.-D.C. converters.Having Japaneses caps makes a HUGE difference in P.C. stability.I have P.C.s come in all the time.I see folks will spend thousands on graphics,mother-boards,etc and put in a cheap power supply that fries the P.C..I only put in Seasonic or Antec (the Seasonic or Delta made power supply versions)

Cons: None so far

Did you find this review helpful? Yes No

  • Johan P.
  • 6/1/2013 9:13:54 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGreat PSU

This review is from: SeaSonic M12II 650 SS-650AM 650W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Semi-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Super quiet, easy to use the modular components, not a single issue with this product. Totally worth the price.

Cons: None so far.

Did you find this review helpful? Yes No

  • Samuel A.
  • 4/26/2013 11:44:08 PM
  • Tech Level: High
  • Ownership: less than 1 day
  • Verified Owner

4 out of 5 eggsRead if you like Silent

This review is from: SeaSonic M12II 650 SS-650AM 650W ATX12V / EPS12V SLI Ready 80 PLUS BRONZE Certified Modular Active PFC Semi-modular Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: -DC-to-DC conversion, huge fan of this... Love the idea and how Seasonic executed this.
-Quality - Seasonic seems to deliver high quality components even if their website and customer service are shotty
-Modular
-Good price

Cons: -Loud

Alright, so I had this in my computer for all of 15 minutes before finding out what a couple of other reviewers were talking about, I'm surprised this isn't widespread. The computer was silent upon booting, so much so that I was impressed. I right away tried stressing it with Prime95 and furmark. I don't have an extreme system, a AMD 8350 and a AMD 7870 for a graphics card. I understand this powersupply ramps up when it goes under load... that is a bit of a understatement.

Within about a minute of starting those tests it went from near silent to jet engine loud. The rest of the components in my system were running cool as always... and quiet as I have custom fan speeds setup and this just blew everything away. It was pushing and sucking more air then I think all the other fans in my system combined were doing. It's not just loud, it's unberably loud. Louder then all my other fans when I ramped them up to 100% which they're never at.

Okay I thought, this is a simulated load and wouldn't be representative of normal computer use. So I removed the load (p95 and furmark) and waited for the fan to spin down... and waited... and waited. It took about 10 minutes before the fan returned to a semi-normal level. Waaaay too long as all my other fans spun down after the heat and load level were gone in about 15 seconds.

The funny thing is, it never returned to it's quiet state even after the load was completely gone... I tried power cycling the computer, that did nothing. I tried removing the power and plugging it back in, that also did nothing... It turns out I had to leave the computer off for around 15 minutes before the fan would reset to it's quiet state, regardless of load and heat levels. This was very aggrivating...

But I persisted. I then fired up the computer in it's quiet state and left it like that without touching it. Within about five minutes the fan spun up to the 'normal' level it was after I tried p95 and furmark earlier. Alright I thought... Maybe this is just normal and it is indeed tolerable...

So I fired up Guildwars 2 to simulate a normal load and within another five minutes it was spinning blender fast and with the noise to boot, even though the load wasn't all that intense. My CPU was running at about 40% load and my graphics card at 100%, but not with the same draw.

So, it went back in the box.

Other Thoughts: It's really a shame, I was actually pretty stoked to get this PSU as my OCZ 500w modular has been slowly giving me problems.

It sounds great on paper and I'm sure it performs up to par and I believe it, that's what makes this so hard. After picking through all the PSUs and coming across Seasonic I thought I found the best at everything except customer service which I really don't mind. The noise really is killer.

I'm surprised more of these reviews don't mention it, but all I can imagine is either they never actually put the PSU under load, they wrote them before they played some games, or they don't play games at all.

I'm sure other games would also yield similar results, especially Battlefield 3 which is quite popular. The fan really is terrible.

I would buy a different Seasonic model, but I'm not sure if this persists through all their models or just this particular series. I'm guessing they use the same fan speed control algorithm in all their PSUs, but they don't list which PSUs use what (most manufacturers are vague on this which is a shame).

Other reviews don't seem to mention this so it's quite hard to gauge whether or not other Seasonic PSUs have similar noise issues, which is also a shame. All you need to do to duplicate my results is run prime 95 for five minutes or so. My system isn't even OC'd... yet, which I'm sure would make these noise issues worse.

There really should be a chart on their website that shows fan speed at certain load levels. More so then that, the fan in PSUs should be based off temperature, not load. If it's frigid cold and the PSU is cold, there is no reason to run the fan at ultra high RPMs even if it is under load. I don't understand why PSU manufacturers are using load instead of temperature for their algorithms (Seasonic isn't the only one). It completely ruins a system builders ability to maintain a quiet system by venting heat through other means (like case fans).

If the case is cool, then once again the PSU fan shouldn't spin like the world is on fire.

I guess I'm going to dig through some more reviews and maybe take a look at Seasonics older M12 series. I'm guessing if they don't have a variable control and simply have a quiet fan that it'll be perfect (the 620w may be like this).

Otherwise I'll be going with Corsair. That was the choice I made, it was between Corsiar and Seasonic, and Seasonic won with it's epic build quality and DC-DC conversion. It's too bad they lost to decibels.

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

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