Result Analysis and
Discussion
Efficiency
115V
|
|
Load |
Pin(W) |
Pout(W) |
Efficiency |
| 20 % |
178.8 |
152.6 |
85.32 % |
| 50 % |
439.1 |
378.4 |
86.18 % |
| 100 % |
903.3 |
743.8 |
82.34 % |
The 80Plus Bronze certification requirements (82% - 85% - 82%) are
surpassed especially at 20% Load. This is the case with most of todays PSU's an
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 with margin within the norms and absolutely satisfactory
(especially when you consider the Topology used in this
PSU).
|
Noise |
|
Load |
|
| 20 % |
Silent |
| 50 % |
Audible |
| 100 % |
Noisy |
Noise level results are decent but we would prefer if it was much
less noisy under full load.
|
Noise/Ripple |
|
Voltage |
Noise/Ripple Vpp |
| 5V |
0.031 |
| 12V |
0.050 |
| -12V |
0.032 |
| 3.3V |
0.032 |
| +5VSB |
0.026 |
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
compared to high end PSUs using Japanese capacitors. Transient loads are a big
issue for this topology. In modern PCs transient load changes often occur. This
can end in a output Voltage not within the norm for a short moment. This again
can end up in system instability.
be quiet! Pure Power L8 730W CM Review 