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Tuniq Potency 550W Review

paulktreg    -   August 24, 2008
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Testing (Continued):

Efficiency and Power Factor

 

 

 

 

  

 

 

 

 

 

 

Output And Efficiency At 110VAC

DC Load (W)
AC Load (VA)
AC Load (W)
PF
Efficiency (%)
Pass/Fail
0 10
3
0.32
N/A
N/A
 112
146
142
0.97
79
Pass
286
361
357
0.99
80
Pass
399
536
539
1.00
74
Pass
541
776
781
1.00
70
Pass

 

Output And Efficiency At 240VAC

DC Load (W)
AC Load (VA)
AC Load (W)
PF
Efficiency (%)
Pass/Fail
0
18
4
0.26
N/A
N/A
113
158
139
0.88
81
Pass
286
376
354
0.94
81
Pass
400
547
522
0.95
76
Pass
547
769
745
0.96
72
Pass

 

The 80 PLUS certification requires the Tuniq Potency to run at greater than or equal to 80% efficiency at 20%, 50%, and 100% of rated power output. While the specification has been met at 20% and 50%, the power supply failed to hit the 80% mark at 100% load for both 110VAC and 240VAC input. The power supply did, however, meet the ATX12V minimum required efficiency, and I have therefore given the power supply an overall pass in this section.

The 80 PLUS certification also requires the power supply to maintain a power factor PF of 0.9 or better, and again, one minor hiccup at 20% load on 240VAC. A minor failure that maybe we can forgive?

 

AC Ripple on DC Outputs

 

All AC ripple measurements are made at the maximum load, and were found to be virtually identical for 110VAC and 240VAC input. I have therefore included oscilloscope screenshots for 240VAC only.

 

 

AC ripple on 3V3 rail.

 

 

 

AC ripple on 5V0 rail.

 

 

 

AC ripple on 12V rail.

 

Tuniq Potency 550W AC Ripple/Noise Measurements

DC Output

+3V3
+5V0
+12V0(1)
+12V0(2)
-12V0
+5VSB

Ripple (mV p-p)

10
20
40
40
50
30
Pass/Fail
Pass
Pass
Pass
Pass
Pass
Pass

 

No problems here. Onward.




  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specifications & Features
  4. Testing: Load Testing 110VAC, 230VAC
  5. Testing: Efficiency and Power Factor
  6. Testing: Temperature, Noise Levels, and Fan Speeds
  7. Conclusion
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