Performance Rating

Overall performance is disappointing because of the poor load regulation on the minor rails, mediocre transient response, non-optimal PSU timings, and massive voltage drop on all rails during the toughest turn-on transient test. Please note that the Seasonic PSUs leading the charts are older models since I haven't reviewed any Seasonic PSUs recently.

Noise Rating

The graph below depicts the cooling fan's average noise output throughout the entire operating range of the PSU, with an ambient temperature between 30 °C and 32 °C.


This is a passively cooled PSU, so noise output is minimal.

Efficiency Rating

The graph below shows the PSU's average efficiency throughout its entire operating range, with an ambient temperature between 30 °C and 32 °C.


Average efficiency is high enough. Still, the older Prime Titanium Fanless 600 W PSU I evaluated two years ago, in December 2018, achieves notably higher efficiency levels.

5VSB Efficiency Rating

The graph below shows the PSU's average efficiency at 5VSB, with an ambient temperature between 30 °C and 32 °C.


The 5VSB rail's average efficiency is high, but I would like to see over 80% efficiency since this is a very high-end PSU.

PF Rating

The graph below shows the PSU's average PF throughout its operating range, with an ambient temperature between 30 °C and 32 °C.


The APFC converter needs tuning. Its performance is poor.