Result Analysis and
Discussion
Efficiency
115V
|
| Load |
Pin(W) |
Pout(W) |
PF |
Efficiency |
| 20 % |
190.08 |
173.62 |
0.9869 |
91.34 % |
| 50 % |
469.00 |
432.86 |
0.9970 |
92.30 % |
| 100 % |
957.80 |
860.36 |
0.9981 |
89.83 % |
The 80Plus Platinum certification requirements (90% - 92% - 89%)
are surpassed especially at 20% Load. The full load efficiency is a bit higher
at 230V AC. This is the case with most of PSUs 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 |
1.99 |
5.00 |
| 3.3V |
2.00 |
3.35 |
| 12V |
12.27 |
12.09 |
| 5VSB |
0.53 |
5.04 |
|
|
|
50 % |
5V |
5.03 |
4.97 |
| 3.3V |
5.01 |
3.32 |
| 12V |
31.20 |
31.20 |
| 5VSB |
1.32 |
5.04 |
|
|
|
100 % |
5V |
9.10 |
4.91 |
| 3.3V |
9.08 |
3.27 |
| 12V |
63.63 |
11.98 |
| 5VSB |
2.64 |
4.97 |
The voltage regulation
on this PSU is very good. It makes use of a DC-DC topology. This means, that the
Dark Power Pro 10 850W is mainly a 12V PSU and then generates its 5 and 3.3V
from 12V. This is a modern approach, and since the load is mainly on 12V it
makes a lot of sense. For almost any PSU which makes use of this topology
crossload tests do not present a problem at all.
|
Noise |
|
Load |
|
| 20 % |
Noiseless |
| 50 % |
Silent |
| 100 % |
Audible |
The noise levels on the Dark Power Pro 10 850W are quite reasonable
as it is completely noiseless at 20% load, silent at 50% but also audible at
100% but far from noisy.
|
Noise/Ripple |
|
Voltage |
Noise/Ripple Vpp |
| 5V |
0.015 |
| 12V |
0.025 |
| 3.3V |
0.012 |
| +5VSB |
0.011 |
The noise/ripple values are
very good and way below the threshold.
be quiet! Pure Power L8 700W Review 