Seasonic M12II EVO Edition 850W '80 Plus Bronze' Fully Modular Power Supply

M12II EVO Edition 850W '80 Plus Bronze' Fully Modular Power Supply

  • Seasonic M12II Bronze Series has been the ever-popular power supply series of the semi modular category.
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Stock Code: CA-043-SS

EAN: 4711173872597

MPN: SS-850AM2

Manufacturer: Seasonic

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Product information:

M12II EVO Edition 850W '80 Plus Bronze' Fully Modular Power Supply


- DC to DC Converter Design, provides superior dynamic response, greater stability and maximize 12VDC rail output.
- Super high efficiency for energy savings.
- Conductive solid polymer aluminum electrolytic capacitors
- Advanced ultra-low resistance, high temperature (105°C) electrolytic capacitors
- Multiple 12V outputs with enhanced +12V current capability to broaden utilization capabilities.
- Active Power Factor Correction [99% PF] for reduced line noise and power distortion.
- Universal AC Input for plug and run anywhere around the world.
- >100,000 hours MTBF
- Smart and Silent Fan Control [S2FC]
- Honghua 12cm FDB fan for increased airflow, lifetime and reduced noise levels.
- Ultra ventilation [Honey Comb Structure] for increased airflow and reduced noise levels.
- Full-Modular cable connections
- Easy Swap peripheral connectors for easy plug and unplug connection.
- Scratch resistant powder coat paint (black)
- Total Protection with Over Voltage, Over Power and Short Circuit Protection.
- RoHS & WEEE compliant
- TUV, C-UL, Semko, CCC, CB, Gost-R, Ukraine
- PFC Harmonics compliant, EN61000-3-2: 2000
- CE, FCC, BSMI, C-tick


- 1 x 20+4-Pin ATX12V/EPS12V
- 1 x 4+4-Pin ATX12V/EPS12V
- 1 x 8-Pin ATX12V/EPS12V
- 6 x 6+2-Pin-PCIe
- 10 x SATA
- 5 x 4-Pin-Molex
- 1 x FDD
- Warranty: 5yr

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Customer review

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Star Rating

Average customer rating

(from 4 customer reviews)
All Time (4)

super seasonic!

Great PSU this. Replacing my messy popped fully wired daisychained old psu with this could not have been easier. The fully modular design keeps your wiring to the minimum and out of the way thanks to the generous wire lengths of the looms which come in their own seasonic monikered draw string bag. The motherboard wiring issue mentioned by others simply isnt one. The design calls for an 8 pon atx to be inserted in one row and the longer plug in the other row but there is plenty of slack between the two and they fly in easily. I would certainly not drop stars or recommend another PSU based on it. As far as operation is concerned it have plenty on tap and will support SLI/crossfire set ups no problem and with the high quality componants that this PSU uses will hopefully mean the power will be there for a long time to come. At


great for the price

First off all this is a great PSU for the price, I cannot hear it at all in my case and seems to stay pretty cold. well constructed and packaged and nice flat cabling . However The 24 pin connector is weirdly designed and has to be forcefully twisted to get it into the 2 sockets for it on the PSU. I had to attach it before I put it into the case as I didn't have the leverage required otherwise. very strange design choice. So taking one star off for that.


Poor Design

Hi, my old PSU died so i got this the review was good, except that the review did not mention the appalling cable design where is says M/B you will need to twist the connectors around on the main motherboard cable to get them to fit into the sockets on the PSU.
I know it sounds lame but you try it and you will see what i mean look at the picture above of the sockets and you can see the two M/B sockets, the cable design is so that both these sockets should be together in a straight line but no you have to awkwardly twist it to fit. The instructions are as clear as mud and lack pictures.

Other than that it works fine.


better then the picture

Is fully modular unlike the picture which includes the 24pin , no ugly orange label when mountain luckily , just solid black with white graffiti style writing. The voltage's are bang on and ripple suppression is far far better then both rm850 corsair units I had in previously. The only thing which could have been better is the efficiency rating but for the quality of components inside the PSU and the fully modular asspect its well worth the money


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