Skip to: | |

Newegg.com - A great place to buy computers, computer parts, electronics, software, accessories, and DVDs online. With great prices, fast shipping, and top-rated customer service - once you know, you Newegg.

If you are reading this message, Please click this link to reload this page.(Do not use your browser's "Refresh" button). Please email us if you're running the latest version of your browser and you still see this message.

Newegg.com - Computer Parts, Laptops, Electronics, HDTVs, Digital Cameras and More!

PremierTry Message.
Home
Home > 
Components > 
Power Supplies > 
Power Supplies > 
SeaSonic USA > 
Item#: N82E16817151102

SeaSonic X Series X-850 (SS-850KM3 Active PFC F3) 850W ATX12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply New 4th Gen CPU Certified Haswell Ready

  • ATX12V v2.3 / EPS 12V v2.91
  • Full Modular
  • 80 PLUS GOLD Certified
  • Full Range: 100 - 240V (Max. 90 - 264V) 50/60 Hz
  • +3.3V@25A, +5V@25A, +12V@70A, -12V@0.5A, +5Vsb@3A

ICON Loading...
  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the SeaSonic USA X-850 (SS-850KM3 Active PFC F3)

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 7 years
  • Limited Warranty period (labor): 7 years
  • Read full details

Customer Reviews of the SeaSonic USA X-850 (SS-850KM3 Active PFC F3)

Do you own this product? Write a Review

ICON Loading...

Filter Results

Go

Showing 145 of 145 reviews - Clear Filters

  • Andrew M.
  • 1/21/2016 1:17:30 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsJustifies Its Price and Reputation

This review is from: SeaSonic X Series X-850 (SS-850KM3 Active PFC F3) 850W ATX12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Delivers stable, steady power with very low variation and low ripple.
Modular cables are flexible, making them easy to route.
Cable lengths seem just right for mid-tower case.
Rejuvenated my older power hungry Core i7 system (see Other Thoughts below).
Long warranty.
Comes in a velvet bag :D

Cons: Cable lengths are fine for bottom mount in a mid-tower case, but they might be too short for bottom mount in a full tower case.

Other Thoughts: This Seasonic X850 replaced a Corsair TX750 in my older PC which includes Core i7-965ee (130watt TDP), 6 x 2GB RAM, GTX-760 graphics card, 2 x SSDs, 3 X HDDs , 1 x Blu-ray drive, 1 x DVD drive, 2 x 120mm case fans, 1 x 140mm case fan, gaming keyboard & mouse. Three of the RAM modules, two HDDs and the extra DVD burner were added over time. Although the calculated power requirements fell within the range that the Corsair TX750 should handle, there were occasional glitches and spontaneous re-boots. Also, a couple of games wouldn't run optimally. (Example: Crysis 3 ran smoothly at Medium quality setting but at any higher settings it would sometimes stutter during intense action.) After upgrading to the Seasonic X850 everything runs smooth as silk without a single glitch so far. That Crysis 3 game is now running smoothly on Very High setting, would you believe! It's only been a couple of weeks since the Seasonic was installed, yet it has clearly breathed new life into this older rig. It can also support a new system if any of the old core components decide to give up the ghost. But, with stable, ripple-free power i'm hoping the old motherboard/cpu/RAM combo will soldier on for a while longer.
Last year i did build a new Core i5 system with 2x4GB RAM, 1xSSD, 2xHDD and 1xDVD. Decided to power it with a Seasonic G-series SSR-550. It impressed me a lot so then decided to watch for a sale or rebate on the X850 for my older PC. Glad i did!

Did you find this review helpful? Yes No

  • Patrick D.
  • 1/18/2016 7:15:33 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat brand, solid PSU!

This review is from: SeaSonic X Series X-850 (SS-850KM3 Active PFC F3) 850W ATX12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Great sale buy and upgrade for my old PSU. Arrived promptly and was exactly what i needed. It's fully modular, with a healthy variety of sleeved cables - came in a nifty felt tote bag as well. Although the felt feels a bit cheap, the cables and PSU are clearly high quality. The fan mode toggle switch is also a great feature. While 'normal' operation is pretty quiet already, the 'hybrid' mode is even more quiet. (But still responsive when it counts!)

Overall... Its a great buy, from a quality manufacturer.

Cons: Could probably use another traditional 4-pin molex cable. The connector spacing on the two included cables means well, but was a bit hard to maneuver at first. More of a build-issue, than a con.

Other Thoughts: The black cable sleeves dont match my water cooler's black pipes. This is irritating when I play games in the dark.

Made the rest of my computer look cheap.

Did you find this review helpful? Yes No

  • Anonymous
  • 1/8/2016 10:39:21 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat, high quality PSU.

This review is from: SeaSonic X Series X-850 (SS-850KM3 Active PFC F3) 850W ATX12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: -Clear instructions
-All cabling is provided and labeled
-High quality components
-Comes with velcro cable management straps
-It even comes with a nice velvet bag that serves no purpose.

Cons: -The only con I can come up with is that when mounted the the standard way, intake facing the bottom drawing air in from the underside of the case, the lettering on the ports is upside down.

Other Thoughts: -Definitely a top tier psu.

Did you find this review helpful? Yes No

  • Travis F.
  • 11/17/2015 1:07:31 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggs3 years later and still working perfectly

This review is from: SeaSonic X Series X-850 (SS-850KM3 Active PFC F3) 850W ATX12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: I've had the PSU for over 3 years and this is the only thing I've never had to replace. Still works like a charm.

Cons: Only con of this PSU is the price, but it's well worth it.

Did you find this review helpful? Yes No

  • Gil A.
  • 11/12/2015 7:38:36 AM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsStill going strong after almost 3 years!

This review is from: SeaSonic X Series X-850 (SS-850KM3 Active PFC F3) 850W ATX12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: It supplies enough juice for my PC, 1 GPU, and several peripherals, like 5 case fans hooked via Molex cables and 2 optic drives and 2 HDDs.

Still going strong after almost 3 years! The fan inside PSU working beautifully, which is pretty important.

Comes in awesome packaging. It comes with a case for cables, TONS of cables and it is a modular (meaning, you only hook up cables you need, for improved airflow).
Just an overall awesome product.

Cons: Pricey at $160 but worth every cent. Worst thing ever is a PSU dying out in middle of school project or serious MMO gaming! LOL

Other Thoughts: This is my first SeaSonic PSU and I am hooked for life! Very well built, period. Excellent!

Revire for: SeaSonic X Series X-850 (SS-850KM3 Active PFC F3) 850W ATX12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply New 4th Gen CPU Certified Haswell Ready

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

  • Jack F.
  • 10/28/2015 9:22:05 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsSeasonic 750 Watt Power Supply

This review is from: SeaSonic X Series X-850 (SS-850KM3 Active PFC F3) 850W ATX12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Modular, Well Constructed,Warranty.

Cons: None

Other Thoughts: Ive Bought a Couple Of these Supplys in the Past and have never had a single issue with any of them.

Did you find this review helpful? Yes No

  • Anonymous
  • 10/21/2015 6:14:34 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsWorks Great, Very Quiet

This review is from: SeaSonic X Series X-850 (SS-850KM3 Active PFC F3) 850W ATX12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Very quiet, easy to mount, works like a charm

Cons: Cables are a little stiff, not worth docking an egg off for. Didn't come with enough molex connectors for my server build, needed about 7.

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

  • R L.
  • 9/18/2015 12:55:11 PM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsRock solid

This review is from: SeaSonic X Series X-850 (SS-850KM3 Active PFC F3) 850W ATX12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: Rock solid, good construction

Cons: The cables are a bit on the short side for a full tower case

Other Thoughts: I've been running this PSU on an I5-3570K with a fairly aggressive overclock and a GTX 970 video card (originally a GTX 660 Ti) for over two years now, and I haven't had a single problem with this. If I have any complaints about this PSU, it's that I had some minor difficulties with the initial system build because some of the cables were just barely long enough to reach where they were needed. This was with a CoolerMaster HAF X case, which is admittedly on the large side. A couple more inches here and there would have made this much less of a pain.

Did you find this review helpful? Yes No

  • Derrek H.
  • 9/17/2015 11:16:34 AM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsStill kicking

This review is from: SeaSonic X Series X-850 (SS-850KM3 Active PFC F3) 850W ATX12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: I bought mine in 2013 when I upgraded my GPU and now I'm getting ready to build a new PC and this same psu is going in it. This psu is great, if you want one to last you two build id suggest going with this.

Cons: None

Did you find this review helpful? Yes No

  • Thomas K.
  • 7/23/2015 3:48:51 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsDead on arrival

This review is from: SeaSonic X Series X-850 (SS-850KM3 Active PFC F3) 850W ATX12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply New 4th Gen CPU Certified Haswell Ready

Pros: I have no pros to list. The unit was dead on arrival. It did com ein a pretty black velvet bag.

Cons: It seems about 10% of the reviews for this device complains of a dead on arrival unit or the unit not working very long. If 1 out of 10 products you make is dead and useless, it would make one think the quality of the product isn't very good.

Manufacturer Response:

Hi Thomas, I am sorry to read of your issue. Did you make sure that all cables are properly connected? Any miss connection will result in the system not booting. Please also note, not all buyers will write a review. Seeing 10 reviews does not mean only 10 pcs were sold. If you have any questions, please write to: newegg@seasonicus.com Thank you.

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

Compare Offers from All Sellers newegg

Seller Name & Rating Offer Details  
ICON Loading...
|
BUY WITH CONFIDENCE

This product qualifies for Newegg's Price Match Guarantee. We'll match any qualifying competitor's price. Learn More

Send It As A Gift!

gift services details
Selected Items

Best Service Sellers

Are you an E-Blast Insider? Subscribe Newegg e-Blast
PayPal
Shop without retyping payment details. Secure shopping made faster.
Check out with PayPal.
Home
Home > 
Components > 
Power Supplies > 
Power Supplies > 
SeaSonic USA > 
Item#: N82E16817151102
If the Adobe Reader does not appear when you click on a link for a PDF file, you can download Adobe Reader from the Adobe web site.