Under the Hood
Here are a few pictures showing the layout and components inside the Enermax TriAthlor 550W power supply. The overall build quality appears to be very good as we have come to expect from Enermax.
The main electrolytic capacitor on the primary is rated at 390uF, 400V, and 85°C and all of the capacitors are Japanese made. The main bridge rectifier is located behind the large choke coil on its own heatsink.
The TriAthlor 550W PSU uses two DC to DC converters to produce the +3.3V and +5V outputs from +12V. Each DC to DC converter resides on its own daughter card located behind the AC receptacle and incorporates solid polymer caps.