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Corsair AX850 850W Power Supply Review

paulktreg    -   September 22, 2010
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Specification:

 

Review Sample: Corsair 850AX 850W Power Supply, Part Number CMPSU-850AX.

 

Ratings Table:

 

 

 

 

 

 

 

 

 

 

 

 

Corsair AX850 850W (CMPSU-850AX) Power Supply Specification Table
AC Input
90-264V     10-5A     50-60Hz
DC Output
+3V3
+5V
+12V
-12V
+5VSB
Maximum Load
25A
25A
70A
0.5A
3A
Maximum Combined
Wattage
125W
840W
6W
15W
850W

 

System Protection:

"The Corsair Professional Series Gold AX850 power supply conforms to all required international safety standards, providing industrial grade protection. All outputs are monitored for over-current, under-voltage and over-voltage conditions. Over-Current Protection (OCP) is present on all rails, including the single +12V rail. Over-Temperature Protection (OTP) and Short-Circuit Protection (SCP) are both also included."

 

Safety & Agency Approvals:

 

Corsair AX850 850W (CMPSU-850AX) Power Supply Safety & Agency Approvals
FCC
FCC Rules Part 15, Class B
ICES
ICES-003
CE
EN 55022:2006+A1:2007 Class B, EN61000-3-2:2006 Class D, EN61000-3-3:1995+A1:2001 +A2:2005, EN55024:1998+A1:2001+A2:2003, IEC61000-4-2:1995+A1:1998+A2:2000, IEC61000-4-3:2006, IEC61000-4-4:2004, IEC61000-4-5:2005, IEC61000-4-6:2003+A1:2004+A2:2006, IEC61000-4-8:1993+A1:2000, IEC61000-4-11:2004
UL/CUL
UL60950-1
CSA
C22.2 NO. 60950-1
C-TICK
AS/NZS CISPR 22:2006 CLASS B
TUV
EN 60950-1
cTUVus
UL 60950-1:2007&CAN/CSA C22.2 NO. 60950-1
CB
IEC 60950-1
CCC
GB4943, GB9254, GB17625.1
BSMI
CNS14336, CNS13438
GOST
R IEC 60950-1-2005, R 51318.22-99, R 51318.24-99, R 51317.3.2-2006, R 51317.3.3-99
ROHS
2002/95/EC, Restrictions of Hazardous Substances Directive
WEEE
2002/96/EC, Waste Electrical and Electronic Equipment Directive
ROHS (China)
China Order No.39, Administration on the Control of Pollution Caused By Electronic Information Products

 

Power Supply Physical Characteristics:

 

Corsair AX850 850W (CMPSU-850AX) Power Supply Physical Characteristics
Weight
Length
Width
Height
4.2lbs/1.9kg
6.3in/160mm
5.9in/150mm
3.4in/87mm

 

Power Supply Connectors:

 

Corsair AX850 850W (CMPSU-850AX) Power Supply Connectors
Connector Type
Qty
Motherboard 20+4 Pin
1
ATX12V/EPS12V 4+4 Pin
2
PCI-E 6+2 Pin
4
SATA Power 15 Pin
12
Peripheral 4 Pin
8
FDD 4 Pin
2

 

Power Supply Cable Lengths:

Corsair AX850 850W (CMPSU-850AX) Power Supply Cable Set
Cable Type
Cable Length/Connector Spacing’s
Qty
Modular
PSU > 24" > Motherboard 20+4 Pin
1
Modular
PSU > 24" > ATX12V/EPS12V 4+4 Pin
2
Modular
PSU > 24" > 2 x PCI-E 6+2 Pin
2
Modular
PSU > 16" > SATA > 6" > SATA > 6" > SATA > 6" > SATA
2
Modular
PSU > 16" > SATA > 6" > SATA
2
Modular
PSU > 16" > Peripheral > 6" > Peripheral > 6" > Peripheral > 6" > Peripheral
2
Adapter
Peripheral > 4" > FDD
2

 

Features:

Unprecedented power protection:

The Corsair Professional Series Gold power supply pushes the state of the art for reliable delivery of clean power under imperfect conditions. If you require mission-critical stability or you simply want one of the best power supplies available, the Professional Gold is for you.

 

A true modular cable system:

All cables detach from the power supply. During installation, this gives you the flexibility of using only cables that you need for a clean system build with optimal airflow. And, when its 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 Cosair Professionl 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.

 

  • It supports the latest ATX12V V2.31 and EPS 2.92 standards and is backwards compatible with ATX12V V2.2 and ATX12V V2.01 systems.
  • An ultra-quiet double ball-bearing fan delivers excellent airflow at an exceptionally low noise level by varying fan speed in response to temperature.
  • Up to 90% energy efficiency at real world load conditions means less heat generation and low energy bills.
  • 0.99 Active Power Factor Correction provides clean and reliable power.
  • 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-power 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.
  • The 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 maximise airflow through your computers chassis.
  • A seven year warranty and lifetime access to Cosair's legendary technical support and customer service.



  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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