Next up, we'll do what you may not want to... WARRANTY VIOLATION!
The first thing we notice inside the housing is the 120mm fan. Just like Seasonic says, we've got a 12V 120mm fan. With 7 fins, we can assume this will push a good bit of air and be fairly quiet.
Once inside, you'll notice the large aluminum heatsinks and a sea of capacitors, coils, wires, and goop. Seasonic says they're "High Reliable 105°C Japanese Capacitors" and a quick check confirms that. The next picture gives us a side view of the "working end". You can see the plastic shield on the power board and the massive cluster of wires.
The first picture below shows up close the quality of the solder joints. The second picture below shows the other side of the unit with more coils, heatsinks, and goop.