Tuniq Potency 550W Review
paulktreg - August 24, 2008» Discuss this article (1)
Testing (Continued):
Efficiency and Power Factor
|
Output And Efficiency At 110VAC |
|||||
|
DC Load (W)
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AC Load (VA)
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AC Load (W)
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PF
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Efficiency (%)
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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 |
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DC Load (W)
|
AC Load (VA)
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AC Load (W)
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PF
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Efficiency (%)
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Pass/Fail
|
|
0
|
18
|
4
|
0.26
|
N/A
|
N/A
|
|
113
|
158
|
139
|
0.88
|
81
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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.
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Tuniq Potency 550W AC Ripple/Noise Measurements |
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|
DC Output |
+3V3
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+5V0
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+12V0(1)
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+12V0(2)
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-12V0
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+5VSB
|
|
Ripple (mV p-p) |
10
|
20
|
40
|
40
|
50
|
30
|
|
Pass/Fail
|
Pass
|
Pass
|
Pass
|
Pass
|
Pass
|
Pass
|
No problems here. Onward.
