Professional Series™ HX850 — 80 PLUS® Silver Certified Modular Power Supply

Professional Series™ HX850 — 80 PLUS® Silver Certified Modular Power Supply

Featuring a comprehensive modular cable set and 80Plus Silver level efficiency, the CORSAIR Professional Series™ HX850W provides ultimate performance to power the latest high-performance, multi-graphics gaming rig.

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The Corsair Professional Series HX850W PSU utilizes advanced DC-to-DC circuitry and meets 80 PLUS SILVER certification standards for up to 90% energy-efficiency*, reducing wasted energy and lowering the amount of excess heat generated. Corsair Professional Series power supplies are built using industrial grade electrical components, ensuring the stable, clean and reliable voltages that are essential for high-end gaming PCs and workstations.

* Tested at room temperature, using a 50% load and 230V AC input.

Corsair Professional Series power supplies boast an innovative cabling configuration that uses low-profile, flat modular cables that reduce air friction to help maximize airflow through the computer chassis. The modular design also simplifies installation as it allows unprecedented flexibility in using only those cables which are needed.

Corsair HX850W Features:

  • Guaranteed to sustain its full rated wattage at an ambient temperature of 50°C
  • Up to 90% energy-efficiency under real-world load conditions*
  • Single +12V rail design providing up to 70A
  • Multi-GPU ready
  • 105°C solid state capacitors
  • Active Power Factor Correction (PFC) with PF value of 0.99
  • Supports ATX12V 2.3 and EPS12V 2.91 standards. Backwards compatible with ATX12V 2.01
  • Auto switching circuitry for universal AC input from 90-264V
  • Over Current/Voltage/Power Protection, Under Voltage Protection and Short Circuit Protection provide complete component safety
  • Dimensions: 150mm(W) x 86mm(H) x 180mm(L)
  • MTBF: 100,000 hours
  • Safety Approvals: UL, CUL, CE, CB, FCC Class B, TÜV, CCC, C-tick
ATX Connector
MTBF hours
100,000 hours
7 Years
80 PLUS Efficiency
EPS12V Connector
Floppy Connector
PCIe Connector
SATA Connector

By Hexus

Posted on   July 30, 2012

Corsair HX850 Gold PSU gets a score of 4/5 and wins the "Recommended" award from

"Backed by a seven-year warranty and putting out solid numbers everywhere, we can recommend it to the enthusiast who needs smooth power to a myriad of graphics cards and storage devices."

Full Review!

By HardOCP

Posted on   May 27, 2009

HardOCP gives the Corsair 850HX their Editor's Choice Award

With its exceptional efficiency, absolutely amazing DC Output Quality, and very good voltage regulation the HX850W hit just about every nail square on the head.

Full Review!

By Techdadreview

Posted on   June 19, 2009

Hardware Secrets gives the HX850W their Golden Award

Corsair HX850W is an impressive power supply, being to this date the power supply with the highest efficiency that we've ever tested, beating Seasonic M12D 750W and Antec Signature 650W.

Full Review!

By HWLegend

Posted on   July 30, 2012

TechPowerUp Highly Recommended the Corsair HX850 Gold and it also scores 9/10.

"To conclude, the new HX850 is an excellent unit which enjoys great support from Corsair through its seven year warranty. If you need a similar-capacity PSU and you have enough money to invest - since the purchase of a PSU is actually an investment for many reasons - then you should seriously consider it. Nevertheless, at this price range, you will find many other interesting alternatives with equally high performance (e.g., the excellent Corsair AX850 is currently sold for 10 bucks less at Newegg). In my opinion, Corsair should lower the price of the new HX850 a little bit, to make it much more competitive."

Full Review!

By PC Perspective

Posted on   July 30, 2012

Corsair HX850 Gold PSU wins the "Performance" award at HardwareHeaven

"For performance the HX850 is right up there with the best mid-high end units. It provides very stable readings across all load ranges and high efficiency. Like the rest of Corsairs recent PSUs this model also remains completely silent up to 20-25% load and is also quiet right up to and beyond 75% with exhaust temperatures always at a low level."

Full Review!


Posted on   July 30, 2012

Corsair HX850 80 Plus Gold PSU wins the "Gold" award at Vortez

"HX850 is a successful revision of an already popular series. Aesthetics have been improved, as has the efficiency. Maintaining good cable management is also very easy thanks to the modular cables. Being impressed with the overall package the HX850 attains our Gold award."

Full Review!

By TechPowerUp

Posted on   June 13, 2009

Jonny Guru recommends the HX850W

The long wait for a modular 850W unit from Corsair is at last over, and I do hereby declare that this unit was worth waiting for. Not only is this the most efficient Corsair I've ever looked at, it's also the best performing.

Full Review!

By TweakTown

Posted on   September 18, 2009

Bjorn 3D gives the HX85W their Golden Bear award

As mentioned before, this PSU could have been certified 80 Gold, which is the highest certification of PSU's. Instead Corsair decided to make sure that every unit would live up to the certification, and thus lowered it to Silver. Again this shows what kind of company Corsair really is, one that you can stand behind, and be sure they will stand behind their warranty 110%.

Full Review!

By Gamezoom

Posted on   June 18, 2009

The Corsair HX850W wins Driver Heaven's Editor's Choice award

The exceptional build quality and the outstanding electrical performance are the primary selling points of the HX850W. Corsair truly built this unit like a tank, choosing one of the latest base designs and some of the most reliable components currently available. This has an impact on its electrical performance too, with the HX850W being remarkably efficient and stable.

Full Review!


Posted on   July 30, 2012

Corsair HX850 Gold PSU gets the "Worth Buying" award at

"The HX850 Professional Series Power Supply is unquestionably another strong offering from Corsair. The custom Channel Well Technology design has no noticeable weaknesses, combining a high level of efficiency with much desired, low noise levels."

Full Review!

By Bit-Tech

Posted on   December 6, 2009

Hexus recommends the HX850W

Bottom line: a solid, well-engineered 850W PSU that's backed up by a decent warranty and priced just about right to tempt users looking to power a high-end PC.

Full Review!