Result Analysis and Discussion
Efficiency 115V
|
| Load |
Pin(W) |
Pout(W) |
Efficiency |
| 20 % |
224.82 |
204.93 |
91.15 % |
| 50 % |
552.70 |
511.42 |
92.53 % |
| 100 % |
1118.50 |
1019.06 |
91.11 % |
The Platinum energy certificate requirements
(90%, 92%, 89%) are surpassed with huge margin.
Its uncommon to see a PSU with such a high margin to the 80Plus requirement.
Good efficiency and a very low efficiency decay between 50 and 100% are a
indicator of quality (especially of the passive components).
Output Stability]t] |
| Load |
Rail |
Loading(A) |
Output(V) |
| 20 % |
5V |
2.00 |
5.04 |
| 3.3V |
2.00 |
3.31 |
| 12V |
14.97 |
12.18 |
| 5VSB |
0.50 |
5.07 |
|
|
| 50 % |
5V |
4.99 |
5.03 |
| 3.3V |
4.99 |
3.30 |
| 12V |
40.64 |
12.16 |
| 5VSB |
1.25 |
5.02 |
|
|
| 100 % |
5V |
9.97 |
5.02 |
| 3.3V |
9.98 |
3.29 |
| 12V |
74.81 |
12.11 |
| 5VSB |
2.50 |
4.95 |
|
Noise |
| Load |
|
| 20 % |
Noiseless |
| 50 % |
Silent |
| 100 % |
Audible |
Voltage regulation of
this PSU is very good. It makes use of a DC-DC approach, which means, that the 12
Volt rail is being used to generate 5 and 3.3V.
This is a very modern approach, and since the Load is mainly on 12V it makes a
lot of sense. Like most PSU, which use this topology, the voltage regulation and
crossload testing does not present a problem.
|
Noise/Ripple |
| Voltage |
Noise/Ripple Vpp |
| 5V |
0.006 |
| 12V |
0.013 |
| -12V |
0.004 |
| 3.3V |
0.012 |
| +5VSB |
0.011 |
The noise/ripple values you can
see here come from a Chroma test report, which we got from the manufacturer. The
noise values
are excellent. However these values are probably measured in a different
way, which means, that they're not comparable to other PSU reviews. However the
DC output quality is excellent, and in comparison with many other PSUs
outstanding.
XFX ProSeries 1250W PSU Review 