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Topower 1000W Gold Power Supply Review

paulktreg    -   July 25, 2011
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Testing:

Efficiency and Power Factor:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Topower 1000W (TOP-1000WG) Efficiency & Power Factor
Supply = 110VAC/50Hz
DC Load (W)
0
177
476
903
DC Load As A Percent Of Max (%)
N/A
18
47.5
90
Efficiency (%)
N/A
82
86
82
Power Factor (PF)
0.70
0.99
0.99
0.99

 

For a power supply claiming 80 Plus Gold certification the efficiency of the Topower 1000W power supply is a little on the low side with a 4~5% shortfall on the required 87%, 90% and 87% at 20%, 50% and 100% loading. It's true the loading levels aren't spot on but other power supplies in this class tend to produce slightly better efficiency levels following the OCC power supply testing methodology. Power factor correction technology is pretty good at its job these days and once again maintaining levels above 0.9 isn't a problem.

 

 

 

Topower 1000W (TOP-1000WG) Efficiency & Power Factor
Supply = 230VAC/50Hz
DC Load (W)
0
177
474
915
DC Load As A Percent Of Max (%)
N/A
18
47
91
Efficiency (%)
N/A
83
87
84
Power Factor (PF)
0.24
0.95
0.97
0.99

 

Slightly better efficiency results on 230VAC as is usually the case but they still fall well short of the required levels for 80 Plus Gold even with the higher AC supply. (The 80 Plus certificate for the Topower 1000W power supply is strictly speaking only valid at 115VAC supply). Power factor once again isn't a problem.

 

AC Ripple On DC Outputs:

 

I have consistently found the AC ripple levels on the DC rails to be more or less equal with an 110VAC or 230VAC mains supply. The results given below are for 230VAC only, but I will continue to check the levels at 110VAC during testing and publish them below if there are any significant differences.

 

AC ripple/noise on the +3V3 rail at 230VAC

Oscilloscope settings: Amplitude = 20mv/div, Timebase = 20mS/div

 

AC ripple/noise on the +5V0 rail at 230VAC

Oscilloscope settings: Amplitude = 20mv/div, Timebase = 20mS/div

 

AC ripple/noise on the +12V rail at 230VAC

Oscilloscope settings: Amplitude = 20mv/div, Timebase = 20mS/div

 

AC ripple/noise on the -12V rail at 230VAC

Oscilloscope settings: Amplitude = 20mv/div, Timebase = 20mS/div

 

AC ripple/noise on the +5VSB rail at 230VAC

Oscilloscope settings: Amplitude = 20mv/div, Timebase = 20mS/div

 

Topower 1000W (TOP-1000WG) AC Ripple/Noise
Supply = 230VAC/50Hz DC Loading = 915W
DC Rail
+3V3
+5V0
+12V
-12V0
+5VSB
ATX12 Max (mV p-p)
50
50
120
120
50
Ripple (mV p-p)
23
52
67
126
43
Pass/Fail
Pass
Fail
Pass
Fail
Pass

The Topower 1000W power supply produced a disappointing set of results in this section. The AC ripple/noise levels are a little higher than other power supplies tested by OCC with borderline levels on the +5V and -12V rails and following the OCC power supply testing methodology, the Topower 1000W power supply doesn't quite maintain its AC ripple/noise levels within the limits set down by the ATX12V V2.2 specification.




  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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