Result Analysis and
Discussion
Efficiency
115V
|
|
Load |
Pin(W) |
Pout(W) |
Efficiency |
| 20 % |
166.54 |
143.03 |
85.88 % |
| 50 % |
407.5 |
354.85 |
87.08 % |
| 100 % |
837.4 |
703.82 |
84.05 % |
The 80Plus Bronze certification requirements (82% - 85% - 82%)
are surpassed especially at 20% load. This is the case with most of PSU's that
you can buy today and it mainly originates from the reason of lower losses in
the AC filtering stage and the PFC at 230V AC.
Output Stability
|
| Load |
Rail |
Loading(A) |
Output(V) |
|
20 % |
5V |
1.61 |
5.40 |
| 3.3V |
1.58 |
3.33 |
| 12V |
9.91 |
12.06 |
| 5VSB |
1.00 |
5.08 |
|
|
|
50 % |
5V |
2.97 |
5.02 |
| 3.3V |
2.90 |
3.34 |
| 12V |
26.57 |
11.98 |
| 5VSB |
1.54 |
5.03 |
|
|
|
100 % |
5V |
5.10 |
5.02 |
| 3.3V |
5.11 |
3.25 |
| 12V |
54.02 |
11.86 |
| 5VSB |
3.00 |
4.97 |
The stability of the output voltages and the outcome
of the crossload tests (results not shown here) are not perfect but still within
the margin and the norms, so they are absolutely satisfactory (especially when
you consider the Topology used in this PSU). Transient loads are a big issue for
this topology. In modern PCs, transient load changes often occur. This can end
in a output voltage that is not within the norm for a short moment. This again
can end up in system instabilities.
|
Noise |
|
Load |
|
| 20 % |
Silent |
| 50 % |
Audible |
| 100 % |
Audible |
Noise level results are decent and mostly attributed to be quiet!'s
choice to use its own high-quality thermally controlled 120mm fan with rifle
bearing.
|
Noise/Ripple |
|
Voltage |
Noise/Ripple Vpp |
| 5V |
0.023 |
| 12V |
0.054 |
| -12V |
0.032 |
| 3.3V |
0.030 |
| +5VSB |
0.036 |
The noise values are within the ATX norm. This is a
perfect example for the quality difference between Japanese and non-Japanese
capacitors. The topology used in this PSU is filter friendly and Teapo
capacitors are used in a high amount. However the filter performance is worse
when compared to high end PSUs with Japanese capacitors.
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