SKU CMPSU-850AX/RF
Professional Series™ Gold AX850 — 80 PLUS® Gold Certified Fully-Modular Power Supply (Refurbished)

The CORSAIR AX850 power supply offers 80 Plus Gold levels of energy-efficiency, and the power needed for high-end, multi-GPU gaming PCs. It is built to CORSAIR&rsquo,s renowned quality standards to provide enthusiasts with the one of the highest-quality 850 watt PSU available.

A Fully Modular Cabling System

All cables detach from the power supply. During installation, this gives you the flexibility of using only the cables you need for a clean system build with optimal airflow. And, when it's time to replace or upgrade your power supply, it can be removed from your system without interfering with your cabling — the cables stay in place and connect to your new fully-modular Corsair power supply.

Incredible Efficiency

With 90% efficiency at 50% load, the Corsair Professional Series Gold power supply runs quieter, generates minimal excess heat, and saves you money every month. It's earned the 80 Plus® Gold seal of approval, your guarantee that you're making the right choice for smart,efficient power delivery.

Corsair Professional Series Gold AX850 features:

  • Supports the latest ATX12V v2.31 and EPS 2.92 standards and is backward compatible with ATX12V 2.2 and ATX12V 2.01 systems
  • An ultra-quiet 120mm double ball-bearing fan delivers excellent airflow at an exceptionally low noise level by varying fan speed in response to temperature
  • 80 Plus Gold certified to deliver at least 90% efficiency at 50% load
  • Active Power Factor Correction (PFC) with PF value of 0.99
  • Universal AC input from 90~264V
    • No more hassle of flipping that tiny red switch to select the voltage input!
  • A dedicated single +12V rail offers maximum compatibility with the latest components
  • Over-voltage and over-current 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
  • Completely modular cable system allows you to use only the cables you need
    • Power supply upgrade and replacement is easy, as the cables only need to be disconnected at the power supply
  • Low-profile, flat cable design reduces air friction and helps maximize airflow through your computer's chassis
  • A seven year warranty and lifetime access to Corsair's legendary technical support and customer service
  • Dimensions: 150mm(W) x 86mm(H) x 160mm(L)
  • MTBF: 100,000 hours
  • Safety Approvals: UL, CUL, CE, CB, FCC Class B, TÜV, CCC, C-tick
ATX Connector
1
MTBF hours
100,000 hours
Power
850 Watts
Warranty
One year
80 PLUS Efficiency
Gold
EPS Connector
2
Floppy Connector
2
Modular
Fully
PCI-E Connector
4
SATA Connector
12
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By Jonny Guru

Posted on  August 26, 2010

AX850 JonnyGuru Recommended

Computer power supplies have come a long way in just the last couple of years. With the implementation of resonant mode topologies and DC to DC converters for non-primary DC output, we've seen efficiency increase more and more. The AX850 is an example of how to implement these features as effectively as possible by avoiding the high ripple typically associated with resonant mode topology and the poor voltage regulation typically associated with DC to DC converters under load.

Full Review!

By Hardwareluxx

Posted on  August 26, 2010

AX850 recommended at JonnyGuru

Computer power supplies have come a long way in just the last couple of years. With the implementation of resonant mode topologies and DC to DC converters for non-primary DC output, we've seen efficiency increase more and more. The AX850 is an example of how to implement these features as effectively as possible by avoiding the high ripple typically associated with resonant mode topology and the poor voltage regulation typically associated with DC to DC converters under load. The cost is high, but you get what you pay for.

Full Review!

By Overclock3D

Posted on  August 22, 2010

AX850 wins Must Have award at KitGuru

We always expect Corsair Professional Series Gold power supplies to perform well and the AX850 has not failed to meet the grade, yet again. The top of the range AX1200 is the best power supply on the market right now, but it comes with a price tag high enough to cause palpatations.

Full Review!

By Fudzilla

Posted on  August 19, 2010

AX850 wins Gold and Performance awards at Hardware Heaven

We expected to feel let down by the AX850 after our great experience with the AX1200 but in the end we were equally impressed by the lower specification model. In fact in some respects, such as the cooling fan performance, it is more impressive than the high end unit. Corsairs exceptional range of power supplies just received another fantastic model and it appears they really can do no wrong in the PSU market.

Full Review!

By kitguru.net

Posted on  August 22, 2010

Kit Guru reviews the AX850

It seems Corsair can do no wrong lately, and if they keep producing quality power supplies like the AX850 and AX1200 then they will quickly earn a massive following.

Full Review!

By TweakTown

Posted on  August 19, 2010

AX850 wins Gold at HardwareHeaven

We expected to feel let down by the AX850 after our great experience with the AX1200 but in the end we were equally impressed by the lower specification model. In fact in some respects, such as the cooling fan performance, it is more impressive than the high end unit. Corsairs exceptional range of power supplies just received another fantastic model and it appears they really can do no wrong in the PSU market.

Full Review!

By TweakTown

Posted on  April 29, 2011

AX850 wins award at Nexthardware

Review in Italian: NextHardware in Italy reviews the AX850 PSU and gives it top marks, 5/5 stars. They say it has almost perfect voltage regulation, very high efficiency and low noise levels, including fanless operation up to 20% load

Full Review!