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Corsair AX850 850W Power Supply Review

paulktreg    -   September 22, 2010
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Testing:

For more information on how we test our power supplies, please browse our testing methodology.

Electrical Safety:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Electrical Safety Test Class 1
Manufacturer/Model
Pass/Fail
Corsair AX850
Pass

 

Short Circuit Protection:

I short circuited the 3V3, 5V0, and the 12V in turn. The power supply did shut down, and once the short was removed and the unit switched off for at least one second, resumed normal operation. Although listed here at the beginning of the testing section, I tend to leave this test until the very end, in case it doesn't quite go to plan.

 

DC Output Voltage Load Regulation:

 

Mains Input Voltage 110VAC

 

 

Corsair AX850 850W (CMPSU-850AX) DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU DC Rail
Measured Voltage(V)
3V3
3.39
5V0
5.04
+12V
12.23
-12V
11.88
5VSB
5.11
Total PSU DC Loading = 0W (0% of Rated Maximum Output Power)

 

Corsair AX850 850W (CMPSU-850AX) DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
3.17
10.68
3.37
3.135 – 3.465
Pass
+5V
4.70
23.64
5.03
4.75 – 5.25
Pass
+12V
10.20
124.44
12.20
11.4 – 12.6
Pass
-12V
0.35
4.15
11.85
10.8 – 13.2
Pass
+5VSB
2.12
10.45
4.93
4.75 – 5.25
Pass
Total PSU DC Loading = 173W (19% of Rated Maximum Output Power)

 

Corsair AX850 850W (CMPSU-850AX) DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
3.16
10.68
3.38
3.135 – 3.465
Pass
+5V
4.66
23.35
5.01
4.75 – 5.25
Pass
+12V
31.76
387.47
12.20
11.4 – 12.6
Pass
-12V
0.35
4.15
11.87
10.8 – 13.2
Pass
+5VSB
2.11
10.29
4.88
4.75 – 5.25
Pass
Total PSU DC Loading = 436W (51% of Rated Maximum Output Power)

 

Corsair AX850 850W (CMPSU-850AX) DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
7.94
26.52
3.34
3.135 – 3.465
Pass
+5V
9.19
45.77
4.98
4.75 – 5.25
Pass
+12V
62.64
759.20
12.12
11.4 – 12.6
Pass
-12V
0.35
4.17
11.92
10.8 – 13.2
Pass
+5VSB
2.04
9.77
4.79
4.75 – 5.25
Pass
Total PSU DC Loading = 845W (100% of Rated Maximum Output Power)

 

Mains Input Voltage 230VAC

 

 

Corsair AX850 850W (CMPSU-850AX) DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU DC Rail
Measured Voltage(V)
3V3
3.40
5V0
5.04
+12V
12.23
-12V
11.88
5VSB
5.10
Total PSU DC Loading = 0W (0% of Rated Maximum Output Power)

 

Corsair AX850 850W (CMPSU-850AX) DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
3.18
10.72
3.37
3.135 – 3.465
Pass
+5V
4.69
23.54
5.02
4.75 – 5.25
Pass
+12V
10.23
124.80
12.20
11.4 – 12.6
Pass
-12V
0.35
4.15
11.87
10.8 – 13.2
Pass
+5VSB
2.12
10.47
4.94
4.75 – 5.25
Pass
Total PSU DC Loading = 174W (20% of Rated Maximum Output Power)

 

Corsair AX850 850W (CMPSU-850AX) DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
3.18
10.75
3.38
3.135 – 3.465
Pass
+5V
4.70
23.59
5.02
4.75 – 5.25
Pass
+12V
31.71
386.86
12.20
11.4 – 12.6
Pass
-12V
0.35
4.15
11.87
10.8 – 13.2
Pass
+5VSB
2.11
10.34
4.90
4.75 – 5.25
Pass
Total PSU DC Loading = 436W (51% of Rated Maximum Output Power)

 

Corsair AX850 850W (CMPSU-850AX) DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
7.95
26.55
3.34
3.135 – 3.465
Pass
+5V
9.22
45.92
4.98
4.75 – 5.25
Pass
+12V
62.68
759.68
12.12
11.4 – 12.6
Pass
-12V
0.35
4.17
11.92
10.8 – 13.2
Pass
+5VSB
2.04
9.91
4.86
4.75 – 5.25
Pass
Total PSU DC Loading = 846W (100% of Rated Maximum Output Power)

 

The Corsair AX850 produced a great set of results in this section with all the rails holding steady from zero to full load. Again, there aren't any problems here so let's move on.




  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
Random Pic
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