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Corsair > 
Item#: N82E16817139009

CORSAIR Enthusiast Series CMPSU-850TX 850W ATX12V v2.2 / EPS12V v2.91 SLI CrossFire 80 PLUS Certified Active PFC Power Supply

  • ATX12V v2.2 / EPS12V v2.91
  • 80 PLUS Certified
  • 100 - 240 V 50/60 Hz
  • +3.3V@30A, +5V30A, +12V@70A, -12V@0.8A, +5VSB@3A
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If you're looking for a power supply to feed your hungry system, look no further. The new TX850W PSU from Corsair puts out an impressive 850 watts of power and supports the latest ATX12V v2.2 standards as well as EPS12V 2.91 standards. The unit is 80 Plus 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 four 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 8 SATA and 8 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 90-264 so you no longer have to worry if the switch was in the right position.

  • newegg ATX12V and EPS12V Compatible Compatible with the ATX12V v2.2 and EPS12V v2.91 standards, the Corsair CMPSU-850TX 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 Maximum Power The Corsair CMPSU-850TX provides a maximum power of 850W for a safe, reliable output for high-end computer systems.
  • newegg 80 PLUSCertified The 80 PLUS certified power supply provides high power efficiency of at least 80% 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 four 6+2-pin PCI-E connectors, the Corsair CMPSU-850TX is ideal for building up a SLI or CrossFire gaming system.
  • newegg 140mm Silent Cooling Fan The Corsair CMPSU-850TX features a 140mm thermally controlled fan for increased overall airflow and heat dissipation in the power supply enclosure.

Learn more about the Corsair CMPSU-850TX


Enthusiast Series


ATX12V v2.2 / EPS12V v2.91
Maximum Power
1 x 140mm double ball-bearing fan
Main Connector
+12V Rails
PCI-Express Connector
4 x 6+2-Pin
SATA Power Connector
SLI Certified
CrossFire Ready
> 80%
80 PLUS Certified
Over Voltage Protection
Overload Protection
Input Voltage
100 - 240 V
Input Frequency Range
50/60 Hz
Input Current
+3.3V@30A, +5V30A, +12V@70A, -12V@0.8A, +5VSB@3A
>100,000 Hours
5.9"(W) x 3.4"(H) x 6.3"(L)


1 x Main connector (20+4Pin)
1 x 4+4 Pin EPS/ATX12V
4 x PCI-E
2 x Floppy
8 x Peripheral
8 x SATA Power
Supports ATX12V v2.2 standard and older ATX12V 2.01 spec

Ultra-quiet 140mm double ball-bearing fan delivers excellent airflow

80%+ energy efficiency at 20%, 50% and 100% load condition for less heat generation and lower energy bill

99% Active Power Factor Correction provides clean and reliable power to your system

Universal AC input 90~264V automatically scans and detects the correct voltage

Dedicated single +12V rail offers maximum compatibility with latest components

Over Current/Voltage/Power Protection, Under Voltage Protection, and Short Circuit Protection provide maximum safety to your critical system components.

High quality Japanese capacitors provide uncompromised performance and reliability.

Extra long cables support full tower size chassis.

Manufacturer Warranty

5 years limited
5 years limited

Quick Info


  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years

Customer Reviews of the Corsair CMPSU-850TX

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  • anthony s.
  • 6/13/2014 2:36:22 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year

5 out of 5 eggs3.7 years and going strong

Pros: I put this PSU in my system with a P67-UD4-B3 MB at the heart of the system with a OC'ed 2600k at 4.7+ ghz # 1.37volts with 8GB of Corsair Vengence DDR3 1600 2x4gb kit sporting 2 EVGA SC GTX560ti cards in SLI runnig at 1ghz core and 2400mhz memory with 1,075volts all mounted in a HAF922 Cooler Master case with every fan slot filled. so 1 140mm fan 6 120mm fans and the stock front 200mm fan. Still just using a H-50 corsair AIO water cooler with push pull 120mm fans. It is the only reason it is running at 4.7ghs instead of 5ghz + since I have a cherry of a chip that will do 5+ghz @ 1.45v but temps go over 70c and that break my rule of keeping my CPU under 70c at all times.
Now I upgrade my video cards at Christmas to 2 EVGA GTX 770 Classified 4GB cars with the ACX cooler and with Nvidias GPU boost 2,0 my primary card runs at 1258mhz on the core and my secondary card runs at 1225mhz on the core with no OCing. When I do Overclo0ck the will ruin at 1330+ mhz and 2000/8000 on the memory. Considering they use 2 8pin power connectors and I have yet to have to run the overclocked while gaming since I am running a 60hrtz panel and I use vsync I am waiting to purchase a new 34" LGUM95 21:9 3440-1440 resolution monitor I think I will wait till then to really push the cards by using a custom bios since the classified cards have 2 seperate bios settings ...normal.OC and LN2. since I will never use LN2 I will flas the new rom files to the LN2 setting then I can finally use a over the max of 1.2v the cards limit you to at without using a custom rom and the classified voltage tuner program. Also I purchased the SLI 770s over the 780s because they have 4gb of vram over the 3gb on the 780 cards @ the time of purchasing themand that 4 GB of vram is more future proof then 3gb of vram especially with the vram newer games are using. The TX850 powers everything with mo problem and I am pretty sure it was made by seasonic who has a very good reputatioin.

Cons: Not modular but I would not dare remove a egg since if you have a decent case like my HAF922 or something a little bigger there is plenty of space for a nice clean cable job. and the less connectors the less chance of loose connections. Example....for each video card you have a combination of 16 connections alone to each video card with some pushing some amps, if it was modular you would have another 16 connection at the PSU side of the cable X that by 2 then using modular cables for just the video cards alone you would have 32 extra connections that have the chance of being loose and causing heat points or loss of connections and more point for corrosion

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  • Christopher P.
  • 6/1/2014 11:36:05 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggsGood, for 2 years

Pros: It worked great, for three years.

Cons: It broke after 3 years of rather light use. JUNK.

Other Thoughts: It should last at least 10 for the price I paid.

Manufacturer Response:

Dear Customer,

We are sorry for the inconvenience. To get a replacement, please submit a ticket at or you may contact us directly at 888-222-4346 and we will be happy to assist you.

Thank you,
Corsair Customer Support
Corsair Support Email:
Corsair Support Phone Number: 888-222-4346

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  • Jerry P.
  • 4/30/2014 6:43:47 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsGreat GPU

Pros: Installed in a heavily used PC for Video and Animation with numerous drives and fans. Runs upstairs where it warmer than the rest of the house and it has remained faithful for over 3 years

Cons: None

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  • Duane V.
  • 3/17/2014 11:27:56 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsBest PSU I've ever owned

Pros: Lots of cables, 12V rail is very strong and handles more than what it's rated for with video cards. Currently running 2 GTX 560's in SLI under 6 core processer for 3 yrs. I do believe proper power is why components last longer and this power supply is no slouch.

Cons: None so far after 3 yrs of faithful service.

Other Thoughts: Although the 850W rating seems a little low for some considering what components I am running, the 70A 12V rail is overkill for my hardware and all the accessories.

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  • Samantha T.
  • 1/23/2014 6:36:28 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsWell worth it.

Pros: Very good looking (if that matters to you), put out a lot of power...

Cons: None Reall

Other Thoughts: I run crossfired graphics cards, a 3rd GPU, 5 HDD, an optical drive, my CPU, and about 14 fans on this PSU.

Also, all my components (RAM, CPU, GPU) are overclocked very heavily, and this power supply hasn't slipped once in over 3 years.

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  • Aimee R.
  • 12/10/2013 7:36:49 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsGreat product. died after 3 years of use but corsair happily sent me a new one in a timely manner. great company to deal with

Pros: everything I need

Cons: none

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  • Matthew g.
  • 11/28/2013 9:46:13 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

2 out of 5 eggsNot Great

Pros: Ok while worked

Cons: Died after about 2 years
Not buying again

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  • Timothy B.
  • 10/15/2013 12:06:25 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsGreat PSU

Pros: AWesome PSU. Have had this since 11/2009 and it's still going strong. Spent most of its career powering an i7 920 and a 5770 in a P6T Deluxe. Now it's going to power my i5 3570K, and I feel confident it will keep going for some time to come.

Cons: None

Other Thoughts: Substantial PSU. Too bad they're discontinued.

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  • Joseph L.
  • 9/23/2013 10:42:14 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsGreat product

Pros: Solid. Lots of connections.

Cons: None.

Other Thoughts: Lots of connections, easy install, never had an issue. I bought this 4 years ago for my build and it's never failed me. Recommended.

Did you find this review helpful? Yes No

  • Brett g.
  • 9/3/2013 7:25:41 AM
  • Tech Level: Low
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsStill Kicking

Pros: Purchased this Feb '11. Runs like a champ. Writing this review as I plan to upgrade my system. This however, will not be upgraded. Fantastic that its still running the show.

Cons: None that I am aware of.

Other Thoughts: Feels pretty solid, as I have moved three times in the last few year. Definently got banged around a little bit. (Sadface). Though happy to report, still runs like a spring chicken.

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Item#: N82E16817139009
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