Last week, some six weeks after the review was originally posted, I received a third sample of the Seasonic 520W Platinum. This one is apparently representative of the current production models. I tested the new sample 3 times, with many hours of steady modest load (<100W) and also standby between high load testing, over a period of 5 days. All this was to ensure that no changes occurred as the unit "broke in".
Overall, the level of whining noise of the third sample is very low and did not change over time or load. It is very unlikely to cause any negative reaction with 99% of potential users. (The 1% who might complain are the ones who would never be happy with any product.) [Hit Read More to read more.]