Efficiency

Using the results we gathered so far, we plotted a chart showing the PSU's efficiency at low loads and loads ranging from 10 to 110 percent of the maximum-rated capacity.



Efficiency in the normal load range is satisfactory. Higher efficiency at lower loads would be nice, however.

10%–110% Load Testing

These tests reveal the PSU's load regulation and efficiency levels under high ambient temperatures and show how the fan-speed profile behaves under harsh operating conditions.


This PSU doesn't have any trouble operating at high ambient temperatures. The cooling fan's noise is also kept low. I only managed to push the fan above 40 dBA during the overload test with close to 47 °C ambient. Of note here is that the PF readings are not high. The APFC converter needs tuning with 230 V input.

Light Load Testing

In the following tests, we measure the PSU's efficiency at loads significantly lower than 10 percent of the maximum capacity (the lowest load the 80 PLUS standard measures). This is important for when a PC is idle with its power-saving features turned on.


Average efficiency in the 40–100 load range is satisfactory.

Ultra-light Load Testing

The applied load in this test is only 10 W for PSUs with 500 W and less capacity. We dial in 2% of the maximum-rated capacity for all other PSUs and only run this test with 115 V input.


In this test, efficiency above 70% would be great, but this platform is not fully compliant with the ATX 2.52 specification.

5VSB Efficiency

The 5VSB rail's efficiency is not that high, but you cannot call it low, either.

Power Consumption in Idle and Standby

Vampire power stays below 0.1 W with 230 V input, so I am satisfied.