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Corsair HX750W Power Supply Review

paulktreg    -   August 2, 2009
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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 HX750W
Pass

 

Short Circuit Protection:

I short circuited the 3V3, 5V0 and the 12V rail 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 HX750W
DC Output Voltage Load Regulation
AC Supply = 110V / DC Load = 0W
PSU DC Rail
Measured Voltage(V)
3V3
3.35
5V0
5.11
+12V
12.19
-12V
-12.18
5VSB
5.11

 

Corsair HX750W
DC Output Voltage Load Regulation
110VAC - Total Load at 174W which is 23% of Rated Maximum Output Power
PSU
DC Rail
Measured
Voltage(V)
Measured
Current (A)
Load Power
(W)
ATX12V V Limits
(V)
Pass/Fail
+3V3
3.35
3.12
10.45
3.135 – 3.465
Pass
+5V
5.11
4.74
24.22
4.75 – 5.25
Pass
+12V
12.18
10.29
125.33
11.4 – 12.6
Pass
-12V
11.61
0.33
3.83
10.8 – 13.2
Pass
+5VSB
4.97
2.03
10.09
4.75 – 5.25
Pass
Total Power Supply Loading
174W
 

 

Corsair HX750W
DC Output Voltage Load Regulation
110VAC - Total Load at 415W which is 55% of Rated Maximum Output Power
PSU
DC Rail
Measured
Voltage(V)
Measured
Current (A)
Load Power
(W)
ATX12V V Limits
(V)
Pass/Fail
+3V3
3.34
7.90
26.39
3.135 – 3.465
Pass
+5V
5.10
9.33
47.58
4.75 – 5.25
Pass
+12V
12.16
26.87
326.74
11.4 – 12.6
Pass
-12V
11.67
0.33
3.85
10.8 – 13.2
Pass
+5VSB
4.97
2.03
10.09
4.75 – 5.25
Pass
Total Power Supply Loading
415W
 

 

Corsair HX750W
DC Output Voltage Load Regulation
110VAC - Total Load at 728W which is 97% of Rated Maximum Output Power
PSU
DC Rail
Measured
Voltage(V)
Measured
Current (A)
Load Power
(W)
ATX12V V Limits
(V)
Pass/Fail
+3V3
3.33
11.97
39.86
3.135 – 3.465
Pass
+5V
5.10
13.82
70.48
4.75 – 5.25
Pass
+12V
12.13
49.78
603.83
11.4 – 12.6
Pass
-12V
11.85
0.34
4.03
10.8 – 13.2
Pass
+5VSB
4.96
2.03
10.07
4.75 – 5.25
Pass
Total Power Supply Loading
728W
 

 

Mains Input Voltage 230VAC

 

 

Corsair HX750W
DC Output Voltage Load Regulation
AC Supply = 230V / DC Load = 0W
PSU DC Rail
Measured Voltage(V)
3V3
3.35
5V0
5.11
+12V
12.19
-12V
-12.31
5VSB
5.11

 

Corsair HX750W
DC Output Voltage Load Regulation
230VAC - Total Load at 174W which is 23% of Rated Maximum Output Power
PSU
DC Rail
Measured
Voltage(V)
Measured
Current (A)
Load Power
(W)
ATX12V V Limits
(V)
Pass/Fail
+3V3
3.35
3.12
10.45
3.135 – 3.465
Pass
+5V
5.11
4.74
24.22
4.75 – 5.25
Pass
+12V
12.18
10.29
125.33
11.4 – 12.6
Pass
-12V
11.61
0.33
3.83
10.8 – 13.2
Pass
+5VSB
4.97
2.03
10.09
4.75 – 5.25
Pass
Total Power Supply Loading
174W
 

 

Corsair HX750W
DC Output Voltage Load Regulation
230VAC - Total Load at 416W which is 55% of Rated Maximum Output Power
PSU
DC Rail
Measured
Voltage(V)
Measured
Current (A)
Load Power
(W)
ATX12V V Limits
(V)
Pass/Fail
+3V3
3.34
7.92
26.45
3.135 – 3.465
Pass
+5V
5.10
9.39
47.89
4.75 – 5.25
Pass
+12V
12.17
26.92
327.62
11.4 – 12.6
Pass
-12V
11.74
0.34
3.99
10.8 – 13.2
Pass
+5VSB
4.97
2.03
10.01
4.75 – 5.25
Pass
Total Power Supply Loading
416W
 

 

Corsair HX750W
DC Output Voltage Load Regulation
230VAC - Total Load at 729W which is 97% of Rated Maximum Output Power
PSU
DC Rail
Measured
Voltage(V)
Measured
Current (A)
Load Power
(W)
ATX12V V Limits
(V)
Pass/Fail
+3V3
3.33
11.73
39.06
3.135 – 3.465
Pass
+5V
5.10
13.54
69.05
4.75 – 5.25
Pass
+12V
12.13
50.05
607.10
11.4 – 12.6
Pass
-12V
11.85
0.34
4.03
10.8 – 13.2
Pass
+5VSB
4.95
2.03
10.05
4.75 – 5.25
Pass
Total Power Supply Loading
729W
 

 

Excellent DC voltage load regulation. The Corsair HX750W hardly bats an eye as the load approaches maximum. No problems here, so let's move on.

 




  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specifications & Features
  4. Testing: DC Voltage Load Regulation At 110VAC & 230VAC
  5. Testing: Efficiency, Power Factor & DC Quality
  6. Testing: Temperature, Noise Level & Fan Speed
  7. Conclusion
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