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Corsair AX850 850W Power Supply Review

Price: $199.99


Corsair has been producing high quality, high speed memory modules for mission-critical servers, high-end workstations and the PC enthusiasts market since 1994. Their memory, from the cost effective Value Select range to their flagship Dominator range, is renowned for its quality and performance. Corsair still concentrates their resources on producing high quality memory modules, but today also offer a range of products aimed at the PC enthusiast and mainstream market. The Corsair product catalog now includes solid state and USB drives, PC enclosures, cooling solutions and power supplies.

Corsair recently introduced three Professional Series Gold power supplies, the AX range, with DC output powers of 750 W, 850 W and 1200 W. They all carry 80 Plus Gold certification and come with a fully modular cabling system, making them Corsair's current flagship range. I recently put the AX1200 through its paces and it turned out to be one of the best units I have ever tested. This time it’s the turn of the AX850 so let’s have a close look and see how well this one performs.


Closer Look:

The Corsair AX850 packaging very closely follows the theme used by the AX1200, black and white with a splash of gold, with minor differences to reflect the changes in its specification. The top face of the box carries a photograph of the modular cable connector panel with a white Corsair logo in the top corner along with a short sentence or two with regards to its Professional Series Gold status and 850 W output power. The bottom face of the box carries the technical detail that includes photographs and quantities of connectors, fan noise and efficiency graphs, a specification table, and an outline of the main features in five different languages.










The side panels carry a few short paragraphs to emphasize the Corsair AX850 power supplies professional gold status along with a further set of features, again in five different languages.



Identical side panels include a photograph of the fan grill, model number, and the Corsair logo.


The AX1200 had a plain brown cardboard box within the box but it now comes with the addition of a large black Corsair logo on the top face.


Lift the lid and the instruction manual sits on top of the power supply foam protective cover with the accessories tucked neatly down the side. Top foam cover removed to show the black felt drawstring bag enclosed power supply.



The next pictures show the bagged power supply along with the box contents, which includes power cord, user manual, cable ties, mounting screws, and black modular cable bag.



The high quality packaging from Corsair is typical from a company like this.  Everything is included for a successful and tidy installation. There are no problems here, so onwards.

  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specification & Features
  4. Testing: DC Voltage Load Regulation
  5. Testing: Efficiency, Power Factor & DC Quality
  6. Testing: Temperature, Noise Level & Fan Speed
  7. Conclusion
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