Result Analysis and Discussion
Efficiency 115V
|
| Load |
Pin(W) |
Pout(W) |
PF |
Efficiency |
| 20 % |
284.85 |
251.57 |
0.9869 |
88.32 % |
| 50 % |
697.55 |
629.91 |
0.9970 |
90.30 % |
| 100 % |
1433.5 |
1257.45 |
0.9981 |
87.72 % |
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. The 230V AC 100% Load efficiency is 90.68%.
Output Stability |
| Load |
Rail |
Loading(A) |
Output(V) |
| 20 % |
5V |
3.18 |
5.031 |
| 3.3V |
3.18 |
3.337 |
| 12V1 |
3.65 |
12.12 |
| 12V2 |
3.65 |
12.10 |
| 12V3 |
3.65 |
12.13 |
| 12V4 |
7.3 |
12.15 |
| 5VSB |
0.53 |
5.084 |
|
|
| 50 % |
5V |
7.96 |
5.03 |
| 3.3V |
7.96 |
3.333 |
| 12V1 |
9.16 |
12.11 |
| 12V2 |
9.16 |
12.08 |
| 12V3 |
9.16 |
12.14 |
| 12V4 |
18.32 |
12.10 |
| 5VSB |
1.32 |
5.041 |
|
|
| 100 % |
5V |
15.92 |
5.025 |
| 3.3V |
15.92 |
3.326 |
| 12V1 |
18.32 |
12.08 |
| 12V2 |
18.32 |
12.03 |
| 12V3 |
18.32 |
12.16 |
| 12V4 |
36.64 |
12.09 |
| 5VSB |
2.64 |
4.969 |
|
Noise |
| Load |
|
| 20 % |
Noiseless |
| 50 % |
Silent |
| 100 % |
Audible |
The Voltage
Regulation of this PSU is very good. It makes use of a DC-DC topology. This means,
that the SS-1250XM 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/Ripple |
| Voltage |
Noise/Ripple Vpp |
| 5V |
0.0344 |
| 12V |
0.0308 |
| -12V |
0.0333 |
| 3.3V |
0.0228 |
| +5VSB |
0.0212 |
The noise values are good. Only the 34mV
at 5V are a bit high, but since the 5V ripple performance drastically improves
with just little less 5V load, we don't judge this as a negative point.
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