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XFX Pro Series Core Edition Power Supply Review

paulktreg    -   February 17, 2011
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Testing the PRO750W:

Efficiency and Power Factor:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The XFX PRO750W didn’t quite hit the efficiency levels of 82%, 85% and 82% at 20%, 50% and 100% DC loading required by its 80 Plus Bronze certification following the OCC power supply testing methodology at 110VAC. I can’t exactly replicate the 80 Plus testing protocols so it’s unfair to reach any valid conclusion in this respect. The power supply did however produce a set of efficiency results on a par with other units I’ve tested and 81%, 83% and 78% efficiency at 19%, 51% and 100% DC loading isn’t too shabby. Power factor is never a problem with the 80 Plus Bronze certification requiring >0.9 at 50% DC loading so 0.98 easily hits the mark.

 

 

The XFX PRO750W performed a little better when supplied from a 230VAC supply which is usually the case. Efficiency levels of 81%, 84% and 82% at 19%, 51% and 102% DC loading are a little higher with a slightly lower power factor value of 0.97 at 53% DC loading.

 

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 = 2mv/div, Timebase = 5uS/div

 

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

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

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

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

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

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

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

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

Core Edition PRO750W (P1750SNLB9) Power Supply AC Ripple/Noise
Supply = 230VAC/50Hz DC Loading = 763W
DC Rail
+3V3
+5V0
+12V
-12V0
+5VSB
ATX12 Max (mV p-p)
50
50
120
120
50
Ripple (mV p-p)
12
11
10
17
18
Pass/Fail
Pass
Pass
Pass
Pass
Pass

The XFX PRO750W power supply gave some of the lowest results I've seen in this section and they are really excellent. Absolutely no problems here so let's move on.




  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specification & Features
  4. Testing the PRO650W: DC Voltage Load Regulation
  5. Testing the PRO750W: DC Voltage Load Regulation
  6. Testing the PRO850W: DC Voltage Load Regulation
  7. Testing the PRO650W: Efficiency, Power Factor & DC Quality
  8. Testing the PRO750W: Efficiency, Power Factor & DC Quality
  9. Testing the PRO850W: Efficiency, Power Factor & DC Quality
  10. Testing: Temperature, Noise Level & Fan Speed
  11. Conclusions
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