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Corsair TX850W 850W CMPSU-850TX 12V 70A 24PIN ATX Active PFC 140M Fan Power Supply

Corsair TX850W 850W CMPSU-850TX 12V 70A 24PIN ATX Active PFC 140M Fan Power Supply - 1
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Corsair TX850W 850W CMPSU-850TX 12V 70A 24PIN ATX Active PFC 140M Fan Power Supply - 35156_l.jpg Customer Photos (0)
Reg. Price: $139.99  CAD
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   Shipping Weight:   5 lbs
   Part #: CMPSU-850TX
 May We Also Suggest

Features    [ Edit | History ]

The TX850W ATX12V & EPS12V Power Supply has engineered using advanced technology and components typically found with high performance power supplies. With design features such as a dedicated, single +12V rail offer the maximum compatibility with the latest system components. Energy efficient circuitry capable of delivering greater than 80% efficiency ratings across 20%, 50%, and 100% load conditions make the PSU ideal for the value/quality conscious enthusiast. Reliability and stability are no longer worries for the gamer, overclocker or enthusiast and high-end system builder.

Quick Specs:


  • AMD
  • Intel
Efficiency 80%
Input Voltage 110 V AC 220 V AC
Output Power 850 W
Limited Warranty 5 Year
Output Voltage 3.3 V DC @ 30 A 5 V DC @ 30 A 12 V DC @ 70 A -12 V DC @ 800 mA 5 V DC @ 3 A
Height 5.9"
Width 3.4"
Depth 6.3"
Number of Fans 1
Green Compliant Yes
Green Compliance Certificate/Authority 80 Plus
NVIDIA SLI Supported Yes

Specifications    [ Edit | History ]
General Information  
     Brand Name: Corsair
     Manufacturer: Corsair
     Manufacturer Part Number: CMPSU-850TX
     Manufacturer Website Address:
     Product Model: TX850W
     Product Name: TX850W ATX12V & EPS12V Power Supply
     Product Type: ATX12V & EPS12V Power Supply
     Receptacles: 1 x 24-pin ATX Motherboard
1 x 4-pin ATX12V Motherboard
1 x 8-pin EPS12V Motherboard
4 x 8-pin PCI-E


  • AMD
  • Intel

     Green Compliance Certificate/Authority: 80 Plus
     Green Compliant: Yes
Physical Characteristics  
     Depth: 6.3" (160 mm)
     Height: 5.9" (149.9 mm)
     Width: 3.4" (86.4 mm)
Power Description  
     Input Current: 12 A @ 110V
12 A @ 220V
     Input Voltage: 110 V AC
220 V AC
     Input Voltage Range: 90 V AC to 264 V AC
     Output Power: 850 W
     Output Voltage: 3.3 V DC @ 30 A
5 V DC @ 30 A
12 V DC @ 70 A
-12 V DC @ 800 mA
5 V DC @ 3 A
     MTBF: 100000 Hour
Technical Information  
     Efficiency: 80%
     Number of Fans: 1
     NVIDIA SLI Supported: Yes
     Power Factor Correction (PFC): Active
     Protection Type: Over Current
Over Voltage
Over Power
Under Voltage
Short Circuit
     Limited Warranty: 5 Year

Corsair CMPSU-850TX Customer Reviews

Product reviews on are screened for relevance and inappropriate content. Reviews may contain inaccurate information about the product. If there is a discrepancy, please use the Flag this Review link located beside each review. Reviews are not an endorsement expressed by, but opinions from customers based on their own experience with a product. We do not recommend you make purchasing decisions based on facts or opinions expressed regarding Corsair CMPSU-850TX reviews.
Experience: 3 Months
 Verified Owner
Powerful, quite no noise
I recommend this product, works well, great amount of power, I use my GTX 580 with this and no problems so far. Great price!

Experience: 5 Days
 Verified Owner
Noise, look, Performance
Cpu 4+4pin could have been a bit longer...C'MON
Great power supply which deliver high power efficiency for gamers. but the Cpu 4+4pin could have been a bit longer...C'MON , Seem like a bad joke from corsair... i got to pull it over my gpu and betwwen my cpu cooler and exhaust fan.

Experience: 3 Months
 Verified Owner
Lots of power and stable
Great price
Sleeved cables
Cables are excessively long, may be a problem for some.
I own this and also the TX750 and both are great power supplies. I also received the rebate after about 7 weeks.

A great quality PSU and one of the better prices as well for its class. Enough wattage and amps even for the top single video cards and most SLI setups.

My only gripe and its a minor one is the cables are excessively long. I have a large case with with pretty good cable management so its not to much of an issue but even still its an extra fuss and would be bad for those who cannot hide and tie it back well.

Experience: 22 Days
 Verified Owner
Tons of power for the regular gaming rig
Non-modular is annoying.
Make sure you need a non-modular power supply or you have lots of room in your case. I have a window in my case and it's kind of a mess in there due to all the cables. That being said, good power supply with lots of juice.

Experience: 1 Weeks
Very solid
lots of connections
ready for SLI or CF setups
non-modular so extra unused cables have to go somewhere, in a big bundle usually
Got this for my new gaming/video editing rig and I'm happy with it. It's capable of powering (2) 8-pin video cards also, for SLI or CF. Lots of sata and molex power plugs, as well as the typical 24 and 8 pin motherboard connections. I got it on a MIR sale price so it was a good deal for 850W; large enough for all my needs.

Experience: 1 Years
 Verified Owner
Low noise
Lots of clean power
Corsair quality build psu
Very reliable
Good price
None really, I would have liked it if it was modular for this price.
I have one in my computer with all of these
OCZ 6gb ram
i7 920 overclocked to 4.2
5 case fans
corsair h70
640gb 6gb/s
1tb 6gb/s
nzxt fan controller
samsung dvd drive
Asus 5870 Video Card.
ASUS P7P55D-E LX LGA1156 Motherboard

And I still have LOTS of room to put more stuff in here. I could probably even do a crossfire of the 5870

Experience: 1 Weeks
 Verified Owner
Runs cool and quiet. Has many connectors.
Cable jackets made cables a little stiff to work with. Not a huge problem though.
I bought this PSU with the intention of not being limited by it. So far I am very pleased. I was concerned about the neatness of the spare cables, but with a big case I was able to get them into a small enough bunch that I don't mind them along the bottom corner. Also, I'm not sure if this is by design but I found when hooking up my SATA hdd I had to flip the power connector 180 degrees from the way it wanted to sit to connect it. Then, when I went to connect a second hdd with the next connector along the same cable, I had to flip that one too! It worked but flustered me a bit, especially with the semi-stiff cable.

Experience: 1 Months
-Lots of Connectors, Good cable length, and cables are sleeved
-Admirable performance, nothing to complaint about.
-Very noisy
I purchased this power supply after I realized that my aging Seasonic 500w psu could not power heavily overclocked I5 760 and a pair of HD4890's in crossfire. The cables are nicely sleeved and does not obstruct airflow in a case. The performance is just fine, handling the load easily.

However, my biggest complaint is the noise level, I thought the 140mm fan would be able to stay relatively quiet, but compared to my old Seasonic, which was inaudible over my other case fans, this unit is significantly louder than all my other 9 fans combined. But I suppose this has its advantages since the unit does stay cooler to the touch compared to my old Seasonic S12. Still... I wish I spent a bit more money on another quieter Seasonic model.

Experience: 1 Years
 Verified Owner
Tons of power!
Connectors galore!
I have installed 2 of these in recent computers and they work like a charm. Very quiet operation, no annoying LED's glowing, tons of power connectors for all your needs.

Experience: 21 Days
 Verified Owner
+ Powerfull
+ Love that you can see the corsair logo at the back of the case
- Maybe not
Using this to power a 5850, AMD Phenom II X6, two Hard Drives, a blu-ray burner, a dvd burner, a fan controler and a media card reader with out problems. I'm confident it could tackle more. Will be fine if I decide to upgrade to a second video card, or third hard drive.

 NCIX Forum Messages

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Messages about Corsair TX850W 850W CMPSU-850TX 12V 70A 24PIN ATX Active PFC 140M Fan Power Supply

This PSU and i7 CFX build (Krista_B- Mar 14, 11, 5 Replies) Read this message
good enough power supply for gtx 470 sli (Vagrant | L33TF33T- Jan 22, 11, 2 Replies) Read this message
Wrong Rebate? (gary_c- Aug 23, 10, 3 Replies) Read this message
HELP PLEASE PSU JUST STOPPED WORKING (gurminder_g- Feb 21, 10, 9 Replies) Read this message
Retail? (|Nexus|- Feb 14, 10, 5 Replies) Read this message
Corsair Rebate is $11 not $22 (Charles_A- Jan 14, 10, 3 Replies) Read this message
buzzing sound (mathew_t- Sep 29, 09, 7 Replies) Read this message
Would 750W be enough for this? (Dolores_V- Sep 28, 09, 6 Replies) Read this message
Mounting Location & Fan Support (brandon_b- Aug 18, 09, 2 Replies) Read this message
Where is the $33 MIR for this? (Andrey_M- Aug 16, 09, 4 Replies) Read this message
How well does Corsair honour their rebates? (Roberta A_B- Jul 27, 09, 9 Replies) Read this message
tx850, heat (mathew_t- Jul 06, 09, 10 Replies) Read this message
Odd -12V reading ({[The-Ghost ]}- Jun 22, 09, 7 Replies) Read this message
Corsair TX850W belongs in 80 plus (mathew_t- Jun 12, 09, 2 Replies) Read this message
PSU wattage calculator (Steven_K- Jun 11, 09, 5 Replies) Read this message

Post a New Message  |    All Messages       Browse NCIX Forums

Forum messages are not reviewed and may not contain accurate information about a product. Message contents are opinions from customers based on their own experience with a product. We do not recommend you make puchasing decisions based on Forum messages.
Reviews from the Web

Below are reviews found on other web sites for this product submitted by customers.

Comment: editor's choice :)
Posted by: Cheng_C @01/20/10
Comment: As always a good review from HWC for a PSU that has gone down in price. Dam good value
Posted by: Nicolas_L @07/26/09
Comment: JohnyGuru's 9.5/10 Recommended.
Posted by: Timothy_T @03/10/09
Comment: If you're a gamer, then there's no need to buy an expensive 1000W+ PSU ... An affordable power supply that can satisfy the needs of most gamers is plenty enough ... meet the Corsair TX850W PSU.
Posted by: Evan_W @01/01/09
Comment: Corsair has seemingly righted the ship that is the PSH850 for the most part by providing a power supply with good voltage regulation, a very good build quality, is reasonably quiet, and has in specification DC output quality making this a solid 850 watt PSU choice.
Posted by: Jason_C @12/19/08
Submit a review link   |   Latest 30 reviews
Product Warranty
First 30 days limited warranty through The remainder of the 3 year warranty is provided directly by the manufacturer.

Corsair's DRAM memory modules all carry a lifetime warranty. The Flash Voyager, Flash ReadOut, TurboFlash, Flash Survivor and Mini Flash products all have a warranty for the expected normal life of the product (10 years). The Flash Padlock has a warranty of 3 years. The HX, TX, and VX Series of Power Supplies have a 5 year warranty, and Liquid Cooling products carry a one year warranty. In general, this means Corsair products are guaranteed to operate, as specified by their datasheet, and in the operating environment for which they were intended, for the life of the product or the extent of the warranty.

For additional information and technical assitance, please visit Corsair Memory's support site at:

Corsair Technical Support

Phone:  1-800-205-7657

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All pricing subject to change. For all prices, products and offers, reserves the right to make adjustments due to changing market conditions, product discontinuation, manufacturer price changes, errors in advertisements and other extenuating circumstances. Promotional offers from are subject to availability and are available only while supplies last. No rain checks will be issued on promotional items and offers.

While uses all reasonable efforts to include accurate and up-to-date information on the Site, makes no warranties or representations as to the Site's accuracy. assumes no liability or responsibility for any errors or omissions in the content on the Site. warrants product(s) to be in good working condition and free from defects in material and workmanship for a period of one (1) year for OEM packages, and for thirty (30) days for RETAIL packages, from the original Invoice date unless otherwise restricted below or by the manufacturer's own warranty policy. Defective returns and warranty service will be replaced, exchanged or repaired at's sole discretion, and based on vendor's policy.

NON-DEFECTIVE merchandise returns may be accepted on some items ONLY within 15 days of the Invoice date, at's discretion. All NON-DEFECTIVE returns are subject to a 15% restocking fee. No refunds will be issued for blank media, digital cameras (and accessories), opened software, printers, printer supplies, paper, projectors (and accessories), appliances, handhelds, PDAs, notebook computers, special order computers and special order items.

Defective software, video games or DVDs will be replaced by the SAME title and format ONLY (and subject to current availability) within 30 days of the Invoice date. Software, video games and DVDs may be returned within 30 days only if the item is UNOPENED (with shrink wrap still intact) at the sole discretion of does NOT apply a surcharge to credit card orders. Please read our RMA & warranty policy and terms & conditions for more information. If you have any questions regarding our sales and warranty policies, please send us a message -- we'll be glad to answer any of your questions.


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