Efficiency

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




2% load efficiency is very low because this is an older platform that is not compatible with the newest ATX specification (2.52). Efficiency is satisfactory in the other load ranges.

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 power supply doesn't struggle with delivering its full power, not even under high operating temperatures. The PF readings are high as well, but the fan speed profile is aggressive, set at up to full speed because the fan has to work at full speed to cope with the thermal load under such tough conditions.

Light Load Testing

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


Efficiency in the 40–100 W range is high.

Ultra-Light Load Testing

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


This PSU should at least surpass 60% efficiency.

5VSB Efficiency

The 5VSB rail is efficient, taking the lead from many strong competitors.

Power Consumption in Idle and Standby

Vampire power is increased with 230 V input. Usually, I get a reading below 0.1 W here.