NOVA Seasonic S12 Sleeved

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Power Member
silentpcreview.com disse:
ANALYSIS

1. VOLTAGE REGULATION was good, within ±3% of the nominal values throughout the test. Both the +12V and +3.3V lines were slightly lower than nominal throughout the test, which is fairly unusual; most power supplies are slightly high.

2. EFFICIENCY was almost identical to the Rev. A1 S12-430 that we tested, which is to say that it is among the select (but growing) number of power supplies that reaches above 80%. It didn't do quite as well at the very low end of its output range, but even then the difference was rarely more than a watt or two. At 150W and above, any differences were typically less than half a percentage point and could easily be put down to sample variance.

3. POWER FACTOR was excellent thanks to the active power factor correction circuit. A couple of times, it was so close to the ideal value of 1.0 that no difference could be measured. And, unlike some other active PFC circuits, the power factor remained above 0.99 even at the very low end.

4. TEMPERATURE & COOLING

Temperature was not an issue, and the temperature rise remained below 10°C even at full load, so there is no reason to believe that the smaller heatsinks are inadequate for the 330 watt capacity. The only indication that they are not quite as effective as the ones in the S12-430 is the fact that the fan reached full speed even before full load was reached.

5. FAN, FAN CONTROLLER and NOISE

As mentioned, the fan did not change with the new revision, so the noise character tended to be very similar to the previous S12's, especially the 430 watt version (higher capacity models use a faster fan). Our latest sample produced a more pronounced buzz than the models we've heard previously, although the difference was quite subtle and the volume was not loud.

Of more concern was the fact that the fan ramped up much more quickly than in the previous tests. The fan remained very quiet until just above 150W load, but it jumped up very quickly after that. This was probably caused by the smaller heatsinks that could not cope as well with heavy loads. The end result is that the S12-430 is a better choice for a quiet mainstream or high powered system, since these often peak between 150W and 200W under load. Systems with lower power consumption are less likely to see a difference between the two models.
Review completa: http://www.silentpcreview.com/article596-page1.html
 
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