Result Analysis and Discussion
Efficiency
|
Load |
Pin(W) |
Pout(W) |
Efficiency |
10 % |
117.48 |
102.55 |
87.29 % |
20 % |
224.80 |
204.77 |
91.09 % |
50 % |
555.20 |
509.33 |
91.74 % |
100 % |
1144.30 |
1006.32 |
87.94 % |
The 80Plus Gold certification
requirements (87% - 90% - 87%) are surpassed especially at 20% Load. The full Load
efficiency is a bit higher at 230V AC. 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 % |
3.3V |
2.7 |
3.3 |
5V |
2.7 |
5.1 |
12V |
14.5 |
12.3 |
|
50
% |
3.3V |
6.8 |
3.3 |
5V |
6.7 |
5.1 |
12V |
36.1 |
12.2 |
|
100 % |
3.3V |
13.5 |
3.3 |
5V |
13.4 |
5.1 |
12V |
71.9 |
12.1 |
The Voltage Regulation of
this PSU is very good. It makes use of a DC-DC topology. This means, that the
GPM-1000C 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.
Noise |
Load |
|
20 % |
Noiseless |
50 % |
well audible |
If we listen closer with the power supply, we don't here anything
at 20 percent load. The GPM-1000C is a semi passive power supply and the fan
kicks in, when 35 percent load is reached. It keeps spinning until the load goes
below 25 percent. This ensures adequate internal temperatures under all
circumstances. When demanding 50 percent load from this unit, the noise level
can be described as silent and when there is 100 percent load, the unit is well
audible.
Noise/Ripple @ 100% Load |
Voltage |
Noise/Ripple Vpp |
3.3V |
0.046 |
5V |
0.048 |
12V |
0.072 |
The noise values are ok, but they
are definitely not excellent. At 100% load we see that the ripple values range
from 46mV to 72mV no matter which voltages we're looking at. Since the 12V ripple performance drastically improves
with just little less 12V load, we don't judge this as a negative point.