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Corsair > 
Item#: N82E16817139011

CORSAIR HX Series HX850 850W ATX12V 2.3 / EPS12V 2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Modular Active PFC Power Supply New 4th Gen CPU Certified Haswell Ready

  • ATX12V 2.3 / EPS12V 2.91
  • Modular
  • 80 PLUS GOLD Certified
  • 100 - 240 V 47 - 63 Hz
  • +3.3V@25A, +5V@25A, +12V@70A, -12V@0.8A, +5VSB@3A

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews


If you're looking for a power supply to feed your hungry system, look no further. The new HX850 PSU from Corsair puts out an impressive 850 watts of power and supports the latest ATX12V v2.3 standards as well as EPS12V 2.91 standards. The unit is 80 PLUS GOLD certified and has a 99% Active Power Factor Correction to ensure maximum efficiency.

The cables are extra long, to work in the largest tower. They are fully sleeved for easy routing and bundling. There are six 8-pin PCIe power connectors so you can build up a CrossFire or SLI system using today’s high end video cards. There are also 12 SATA and 12 Molex connectors so you can connect multiple drives and peripherals.

Keeping it all cool is a temperature-controlled 140mm fan. Air is vented through the hexagon mesh back panel. The universal input accepts voltages from 90V to 264V so you no longer have to worry if the switch was in the right position.

  • newegg ATX12V and EPS12V Compatible Compatible with the ATX12V v2.3 and EPS12V v2.91 standards, the Corsair CMPSU-850HX provides maximum power stability to drive the latest Intel and AMD processors as well as other components for desktop and server computer systems.
  • newegg 850W Continuous Power A continuous power of 850W delivers safe, reliable output for even the most extreme computer systems.
  • newegg 80 PLUS GOLD Certified The 80 PLUS GOLD certified power supply provides high power efficiency of at least 87% at any load between 20% and 100%, saving your money on your electrical bill, reducing heat in your computer's system and prolonging its life.
  • newegg Four PCI-E Connectors With six 8-pin(6+2) PCI-E connectors, the Corsair CMPSU-850HX is ideal for building up a SLI or CrossFire gaming system.
  • newegg 140mm Silent Cooling Fan The Corsair CMPSU-850HX features a 140mm thermally controlled fan for increased overall airflow and heat dissipation in the power supply enclosure.


Learn more about the Corsair HX850

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 Corsair HX850

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  • Menachi .
  • 7/11/2015 12:16:29 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsGood Stuff. Don't buy Semi Modular

Pros: I've had it for a year and recently added another GTX 770. It's a good, quiet PSU and get's the job done.

Cons: Don't get a Semi Modular PSU. You'll regret it eventually when you see the light of individually sleeved cables.

Other Thoughts: Besides you can also get an AX860 (80 plus platinum) for 10 dollars more. That's fully modular.

Did you find this review helpful? Yes No

  • Chazz w.
  • 7/7/2015 3:01:16 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsLove this PSU

Pros: I've been through so many Upgrades with my PC except the PSU. Still working like a champ for the past two years!

Cons: None

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  • Doris E.
  • 6/8/2015 2:06:41 AM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggs

Pros: Decent amount of power.

Cons: I've been having issues with my computer in the last month. Keeps getting BSOD and event viewer shows it's power related. And when playing certain games, the PSU makes unusual noises. Really frustrating not being able to consistently play or crash when playing with friends.

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

  • David G.
  • 6/2/2015 9:31:51 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggs

Pros: -semi modular
-powerful enough for a pretty decent gaming tower, amd fx-8350 oc with cross fired r9 280 graphic cards

Cons: after 2 months my psu died but was replaced hassle free from corsair and the new one is working great after 3 months

Other Thoughts: I havent over clocked my cpu yet but I already went through a power calculation for my tower and it said it would take 729 watts so in theory it should work.

Corsair was awesome with the whole return process. All i did was open a ticket, they put a $100 hold on my debit card and sent me a new psu and I sent then my broken one back and I got the replacement one before they got my broken one and then returned the hold. They also have another return process if you don't want the hold put on the card but it was only $100. The only thing is you have to pay for shipment of your broken psu and they are expensive to ship.

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  • Jeremiah B.
  • 6/1/2015 3:49:20 PM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggs

Pros: Plenty of power, good brand

Cons: At some point after I got this power supply and installed it my computer will shut down without any warning. There's been days when it happens 3-4 times a day. Sometimes not very often but it's irritating and i'm currently not happy with this. I've done some reading and I think there's something wrong with the power supply.

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  • Morley H.
  • 5/28/2015 6:19:34 AM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

3 out of 5 eggsCoil Whine

Pros: It works, power connectors are good quality.

Cons: Coil whine became apparent for certain games. Returned the item and bought a different product.

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  • Brandon M.
  • 5/21/2015 2:54:45 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsBeware of power outages

Pros: It is an decent power supply for gamers like me. SLI ready and it holds up good.

Cons: Apparently the Corsair HX850 does not like power surges and power outages. After about 5 months, it is now causing my system to power off unexpectantly and reboot.

Other Thoughts: Is there a way I can RMA my power supply or exchange it for another one?

Manufacturer Response:

Dear Customer,

We're sorry that your Corsair PSU failed. Please contact our Tech Support at 888-222-4346 or submit a ticket at corsair.force.com and we'll be more than happy to assist you with an RMA if necessary.

Thank you,
Corsair Customer Support
Corsair Support Email: support@corsair.com
Corsair Support Phone Number: 888-222-4346

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

  • Joshua L.
  • 5/21/2015 8:55:10 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year

3 out of 5 eggsCorsair products

Pros: +Good appearance & design
+Cable management with ease
+GOLD RATED

Cons: -PRICE, PRICE & PRICE!

Other Thoughts: Since when does a 850W Gold Rated PSU cost the same as a additional GPU?

I've been in the computer building scene for years and I never bought into these pricey PSU's. The only reason this power supply is in my current build is due to it being purchased used in a pre-built system. I gutted the parts to build another computer and decided to take this 850w as a replacement for a 500w corsair.


Keep in mind the 500w Corsair ran like a champ for nearly 3 years not one issue. Priced at $60 it was a excellent deal and would highly recommend it to any entry level builder!


Now the 850w..

No issues as of yet, allows for an additional GPU and more hardware to be connected. Unless you absolutely need the extra power I've found 500-600W to be the gold range for pc builds with single gpu and 3 SSD/ HDD or less. To spend $300 on your power supply is a utter waste of build funds unless completely necessary.

-Josh L

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  • Samuel A.
  • 5/18/2015 11:30:06 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsSilent unless working very hard

Pros: Completely silent during normal operation. Fan doesn't need to run, until more than 40% load. Running with I5 4690 and NVidia 970 power supply fan stays off except when gaming. Haven't put case sides on yet so power supply is still whisper quiet even from few inches away.

Cons: Only some of the cables are modular?

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  • Nicholas P.
  • 5/17/2015 12:03:07 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

2 out of 5 eggsCoil Whine

Pros: Solid PSU

Cons: Coil whine kills it for me, 3rd day in and my PSU is screaming every time i play any game its extremely loud and i cannot find a fix. How does a power supply that cost so much have this problem?

Did you find this review helpful? Yes No

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Item#: N82E16817139011
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