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Sapphire Pure 1250W Power Supply Review

paulktreg    -   October 29, 2009
» Discuss this article (2)

Testing:

Efficiency and Power Factor:

 

 

 

 

 

 

 

Sapphire Pure 1250W
Output & Efficiency @ 110VAC
DC Load (W)
AC Load (W)
PF
Efficiency (%)
Pass/Fail
0
17
0.78
N/A
N/A
279
327
0.98
85
Pass
692
802
1.00
86
Pass
1277
1560
0.99
82
Pass

 

Sapphire Pure 1250W
Output & Efficiency @ 230VAC
DC Load (W)
AC Load (W)
PF
Efficiency (%)
Pass/Fail
0
20
0.19
N/A
N/A
279
321
0.97
87
Pass
690
775
0.98
89
Pass
1278
1508
0.99
85
Pass

 

Efficiencies are well within the ATX12V V2.2 specification and as an added bonus they also meet the claimed 80 Plus Bronze certification following the OCC testing methodology. The power factor levels at 230VAC are also quite impressive when compared to other power supplies in this class. Let's move on and have a look at the DC quality.

 

AC Ripple On DC Outputs:

 

I have consistently found the AC ripple levels on the DC rails to be more or less equal with a 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 they differ in any way.

 

AC Ripple On 3V3 Rail at 230VAC

Oscilloscope settings: Amplitude = 10mv/div, Timebase = 10uS/div

 

AC Ripple On 5V0 Rail at 230VAC

Oscilloscope settings: Amplitude = 10mv/div, Timebase = 10uS/div

 

AC Ripple On 12V1 Rail at 230VAC

Oscilloscope settings: Amplitude = 20mv/div, Timebase = 10uS/div

 

Sapphire Pure 1250W
AC Ripple/Noise
DC Rail
+3V3
+5V0
+12V
-12V0
+5VSB
Ripple (mV p-p)
30
20
60
80
25
Max Limit (mV p-p)
50
50
120
120
50
Pass/Fail
Pass
Pass
Pass
Pass
Pass

 

Excellent! The Sapphire Pure 1250W DC quality is excellent. These noise/ripple levels are at 100% loading, a massive 1250W, and fall well within the ATX12V V2.2 specification. No problems so let's move on.

 




  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specification & 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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