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Power Supply

SeaSonic X Series 850 W 80+ Gold Certified Fully Modular ATX Power Supply

(38 Ratings, 4.8 Average)

Prices

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Specifications

Manufacturer

SeaSonic

Part #

  • X-850
  • SS-850KM3
  • SS-850KM-F3
  • X-850 SS-850KM3 ACTIVE P
  • X-850 (SS-850KM3 Active PFC F3)

Manufacturer

SeaSonic

Form Factor

ATX

Efficiency Rating

80+ Gold

Wattage

850 W

Modular

Full

Type

ATX12V / EPS12V

Fanless

No

PCIe 6+2-Pin Connectors

4

EPS Connectors

2

SATA Connectors

10

Molex 4-Pin Connectors

5

Output

+3.3V@25A, +5V@25A, +12V@70A, -12V@0.5A, +5Vsb@3A

Price History

    Reviews

    thunderdan602
    • 131 points
    • 57 months ago

    from completed build Desert Thunder

    Tier 1 rated Seasonic X Series X-850 850W 80 Plus Gold Certified Full Modular PSU. It’s whisper quiet, it comes with a 7 year warranty, and is more than enough for what I need right now. And if i should decide to SLI in the future, I should still be fine. The cables are nice and long (no problems reaching components in my new full tower case) and come in nice storage bags. This was the first PSU I have ever used that comes with flat cables.

    jalarson5
    • 23 points
    • 32 months ago

    from completed build Penumbra v2

    Great PSU. Looks good too, clean and nice. Super quiet, even under load, although the fan almost never turns on unless I am in BF1 or Tomb Raider. Even then, I can't hear it. Good venting and nice build quality. I probably should have gone with a 650W PSU since my PC doesn't even get close to 850W. First time builder's mistake! At any rate, you can't go wrong with this PSU.

    RobertBel98
    • 19 points
    • 57 months ago

    from completed build Blackbird

    The SeaSonic 850W was chosen for its reliability, and 80 Plus Gold rating. And frankly guys, in my experience, you can never go wrong with SeaSonic.

    birkenpm
    • 19 points
    • 48 months ago

    from completed build Freesync Beast of Burden

    if you install this upside down.. with the fan pointing down in a modern case.. this baby shows you the ugly side, which technical stickers and the like. plus the logo on the back will be upside down as well.. :/ really less than ideal. also documentation kinda sparse.

    iBeRobb
    • 17 points
    • 29 months ago

    from completed build Ryzen from i5-3570k

    Worth the money. Reliable and always started until some capacitors wore out. SeaSonic RMA process was quick and easy too. Got my unit fixed and sent back the same week I sent it in.

    Volkov
    • 11 points
    • 33 months ago

    from completed build Quicksilver RGB ( 1st Build )

    80+ Gold, fully modular and got on super sale. Had a good review on Johnny Guru. More than enough wattage for now and down the road.

    noseonarug17
    • 11 points
    • 28 months ago

    from completed build Grawp

    Eventually upgraded to this after getting a deal (no memory of what I paid, though). Works great, although my TDP is the same as before...my only complaint is that the cables aren't pretty and braided like my EVGA PSU.

    Dhraiden
    • 8 points
    • 49 months ago

    from completed build New Rig Fall 2015

    Another great deal - new, but lacking original packaging, from Amazon warehouse. Anxiously waiting months to complete build to see if it worked, but happily, it did. Invested in a PSU tester, but the cables were incompatible (always a good idea if getting non BNIB PSU's, though!)

    bsmlk
    • 8 points
    • 41 months ago

    This PSU might be overkill, but I did not skimp on the power supply in case she wants to upgrade the CPU/GPU in the future.

    except10na1
    • 8 points
    • 9 months ago

    from completed build Valkyrie

    Has lasted me for 7 years now, and still upto the mark.

    Builds Using This Part

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