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Power Supply

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

( 4.8 Average / 36 Ratings )

Specifications

Manufacturer

SeaSonic

Part #

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

Type

ATX12V / EPS12V

Wattage

850 Watts

Fans

1

Modular

Full

Efficiency Certification

80+ Gold

Output

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

PCI-Express 6+2-Pin Connectors

4

Completed Builds Using This Part

See All Completed Builds

Prices

Merchant Base Promo Shipping Tax Availability Total
SuperBiiz $129.99 +FREE s/h $129.99
NCIX US $134.99 +FREE s/h $134.99
OutletPC $139.89 $139.89+
Newegg $139.99 +FREE s/h In stock $139.99
Jet $146.66 In stock $146.66+
Amazon $139.99 +$12.35 s/h In stock $152.34
( 9 new from $137.00, 5 used from $92.00. Last updated 35 minutes ago. )
Newegg Marketplace $148.00 +$22.23 s/h In stock $170.23
PCM $171.99 +$16.96 s/h $188.95
* Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.

Price History (Excluding Tax & Combo Deals) History:

Reviews

thunderdan602 128 points 20 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.

RobertBel98 18 points 20 months ago
from completed build Client Build: Operation 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.

nayrnayr1 20 points 15 months ago
from completed build My Current Gaming build.

Tier 1, 850w, overkill, but it'll work forever.

nayrnayr1 13 points 14 months ago
from completed build My current build. V2

Best PSU on the market.

Dhraiden 7 points 12 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!)

birkenpm 17 points 11 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.

hitstun 6 points 10 months ago
from completed build Red Cyclone

The SeaSonic 850W PSU was easy to install and hasn't missed a beat. It's a shame nobody can see this tidy modular wiring through my case's tinted side window.

RaspberryPiFan 17 points 10 months ago
from completed build Alpha

The best PSU money can buy. Very stable and modular. I really love it.

bsmlk 10 points 4 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.