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Corsair AX Series, AX850, 850 Watt, 80+ Titanium Certified, Fully Modular Power Supply

4.7 out of 5 stars 2,733 ratings

Only 1 left in stock - order soon.
80+ Titanium
850 Watts
AX

About this item

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  • 80+ Titanium Certified for the highest level of efficiency and performance
  • Zero RPM fan mode for near-silent operation at low to medium loads
  • World Class electrical performance for incredibly stable voltages and ultra-low ripple noise
  • 135mm cooling fan with true FDB Bearing delivers Low-Noise operation even at demanding loads
  • Three-color customizable magnetic side labels let you choose your PSU's style to match your build

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From the manufacturer

AX850

World Class Electrical Performance

Superior voltage regulation and minimal ripple/noise ensures the highest quality and most consistent power for your PC, keeping your system stable and unlocking your motherboard’s true potential for overclocking.

AX850

80 Plus Titanium Certified

The AX850 delivers power at up to 94% efficiency, lowering energy consumption, noise, temperatures, and your power bill.

Certification ID: 5290

AX850

100% Japanese 105°c Capacitors

By using high-end electrolytic capacitors, AX Series power supplies offer the unwavering power and long-term reliability you demand from CORSAIR.

AX850

Zero RPM Fan Mode

The AX Series’ cooling fan doesn’t spin until you need it, for near-silent operation at low and medium loads.

AX850

135mm Cooling Fan

Immensely powerful airflow, low noise operation and longer life thanks to a true Fluid Dynamic Bearing (FDB) fan.

AX850

Fully Modular Cables

Use only the cables you need for quick and easy installation, with stylish sleeving to simplify routing and cable management. Store your unused cables in the included cable bag.

AX850

Customizable Magnetic Side Labels

Customize your PSU to match your system’s style with three included magnetic side labels in red, white or blue.

Learn How To Install


Fully modular power supplies by CORSAIR make installation quick and easy. Decreasing the time it takes to build by only using the cables you need for your system and increasing the degree of customization in your system with a wide variety of different cable colors options.

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Customer Rating 4.7 out of 5 stars (2733) 4.8 out of 5 stars (7794) 4.8 out of 5 stars (146) 4.8 out of 5 stars (507) 4.8 out of 5 stars (4597) 4.8 out of 5 stars (502)
Price $348.02 $129.99 $137.60 $152.60 $134.99 $174.90
Sold By iT Hardware Amazon.com Amazon.com The Middle Merchant Amazon.com Amazon.com
Item Dimensions 1 x 1 x 1 inches 6.3 x 5.91 x 3.39 inches 6.5 x 5.91 x 3.3 inches 6.3 x 5.91 x 3.39 inches 13 x 9.75 x 4 inches
Item Weight 4.43 lbs 3.66 lbs 6.55 lbs 6.00 lbs 3.75 lbs

Product description

Color:80+ Titanium  |  Size:850 Watts  |  Style:AX

CORSAIR ax series fully modular power supplies deliver 80+ Titanium efficient power and ultra-low-noise operation to complete your most ambitious builds The highest quality internal components and all-Japanese 105 Degree rated capacitors provide the tightest voltage regulation and lowest ripple noise delivering only the highest quality power to your PC A 135mm fluid-dynamic bearing fan with Zero RPM mode only turns on when needed ensuring virtually silent operation at low and medium loads Fully modular flattened cables make building or upgrading your PC easy as you only need to install the cables your systems requires With the strength of 80+ Titanium efficiency and the subtlety of near-silent operation the CORSAIR ax series is ready to power the world's best PCs for years to come Tech support 1-888-222-4346 opt 1

Product information

Color:80+ Titanium  |  Size:850 Watts  |  Style:AX

Technical Details

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Additional Information

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
Product Warranty: For warranty information about this product, please click here

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Customer reviews

4.7 out of 5 stars
4.7 out of 5
2,733 global ratings
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Top reviews from the United States

Reviewed in the United States on November 26, 2017
Color: 80 PLUS PlatinumSize: 1000 WattsStyle: HXiVerified Purchase
179 people found this helpful
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Reviewed in the United States on September 1, 2017
Color: 80+ PlatinumSize: 750 WattsStyle: HXVerified Purchase
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4.0 out of 5 stars Inaccurate photo of available 6+2 PCI-e ports
By Slartibart Jones on September 1, 2017
Inaccurate number of modular ports in product photo. The "NO LINK Compatibility" HX750 I received is a pretty nice modular PSU, but instead of the pictured five PCI-E 6+2 connections, there are only four available. Since this section of the PSU is labeled "PCI-E 6+2 / CPU 4+4" that means you only have three connectors for PCI-E and one needed for CPU power. Granted, the included PCI-E cables double up with two ends each, but that just means you are doubling draw on one cable for two cards, probably not advisable for power-hungry multi-card setups.

That's the only thing that doesn't make this 5 stars. The product is not depicted correctly on the site, and would have changed my buying decision.
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139 people found this helpful
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Reviewed in the United States on May 30, 2020
Color: 80 PLUS PlatinumSize: 1000 WattsStyle: HXiVerified Purchase
36 people found this helpful
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Reviewed in the United States on April 18, 2018
Color: 80 PLUS PlatinumSize: 1000 WattsStyle: HXiVerified Purchase
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5.0 out of 5 stars The heart and sole of your system is the PSU, make good choices... Corsair is at the top!
By J. Watterson on April 18, 2018
Many folks overlook the value of the power supply unit (PSU). I cringe when I see nice expensive builds with over clocked CPU's, high end GPU's like 1070-1080tis and Vega's, lots of fans water cooling, RGB and the likes and then see a cheap no name or budget level PSU. Sure they saved a few bucks but they wonder why the overclock is not stable on the CPU or GPU or have random lock-ups and system reboots. Not all power supplies are created equal, not all power supplies can deliver their rated wattage and many even if they do can't do it cleanly with minimal ripple. I've used corsair PSU's exclusively for the past 20 years they are solid and deliver. Jon Gerow (Johnny Guru) works for Corsair as the head of QA at their power supply division. He knows what it takes to make a quality power supply and Corsair delivers! Clean, efficient and quiet and a 10 year warranty too boot!
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39 people found this helpful
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Reviewed in the United States on November 30, 2018
Color: 80 PLUS PlatinumSize: 1200 WattsStyle: HXiVerified Purchase
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5.0 out of 5 stars 1200 watts at your service
By AR on November 30, 2018
I bought the 1200 watts power supply, I dont think I need that much power, but like they say: never here is too much power, right? The depth of this power supply is larger than a standard ATX power supply. Very nice power supply, looks and feels solid. I am getting 87% efficiency, other reviewer report higher efficiency, need to investigate a little more on this.

By the way, to get the Link working , and you should getting working , you get all kind of details about the power supply and your system, anyway I just ran a mini USB cable( I did not use the included cable) from inside the computer and connected to any outside USB 2.0 port, bingo! If you want to force the fan to spin, pick in group the GPU temp , play around , and you will force it to spin.

UPDATE:
I found why I am getting 87% efficiency. It's explained on the manual page 4. I will get 95% efficiency if the system load were 50%, since my system load is about 10% , the efficiency is 87%. Is that make sense?

UPDATE 12/07/18
Extremely happy with this power supply. My HP computer came with a cheap power supply that I never trusted. I dont feel the same with this power supply. I dont care to leave the computer running for 40+ hours while a 4TB is encrypted using bitlocker, etc. I keep saying all the time that what you pay is what you get, and I know this is a cliché but is the true.

UPDATE 12/16/18
Out of the blue, the Link software stopped reporting power supply status like load, temperature, etc., also when everything is good the power supply LED blinks between orange and green, in this case, it became steady orange.
Order a replacement, shipped and delivered fast and quick, just as Amazon knows how to it.
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24 people found this helpful
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Top reviews from other countries

R. Bourne
3.0 out of 5 stars Not happy!!
Reviewed in Canada on February 27, 2020
Color: 80 PLUS PlatinumSize: 1200 WattsStyle: HXiVerified Purchase
7 people found this helpful
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Sam
1.0 out of 5 stars Capacity quickly diminishing. Shutting down by itself with less than 42 percent load.
Reviewed in Canada on December 17, 2017
Color: 80 PLUS PlatinumSize: 1200 WattsStyle: HXiVerified Purchase
11 people found this helpful
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roopster
5.0 out of 5 stars Packaging a mess, but product survived!
Reviewed in Canada on May 16, 2020
Color: 80 PLUS PlatinumSize: 750 WattsStyle: HXiVerified Purchase
2 people found this helpful
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J M B.
3.0 out of 5 stars Good brand but cables could and should be better...
Reviewed in Canada on August 3, 2018
Color: 80 PLUS PlatinumSize: 850 WattsStyle: HXiVerified Purchase
4 people found this helpful
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Morrow Hisoka
1.0 out of 5 stars Used for a bit, and just died on me...
Reviewed in Canada on July 6, 2020
Color: 80+ PlatinumSize: 750 WattsStyle: HXVerified Purchase
2 people found this helpful
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