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Seasonic are using a Hong Hua 135mm fan, Model number HA13525H12F-Z. This fan is being used in the 1000W Gold PRIME unit and the PRIME 1000W Platinum unit as well. It is a Fluid Dynamic Bearing fan, selected by Seasonic for the low noise characteristics. The fan is rated at around 150,000 hours at 25c.
Below - a High Resolution Gallery of the internal layout of the Seasonic PRIME 850W Gold (please remove ad blockers to view)
Overall build quality is very high, as we would expect from Seasonic. Soldering quality is at the same high level as the 1000watt unit we reviewed a little while ago. Seasonic populate the board with some heatsinks in key positions to help with heat control. With the high gold efficiency there is not a need to go crazy with heatsink adoption.
Seasonic use high grade 105c Japanese capacitors in both primary and secondary stages. The two main capacitors are rated 400v 330uF for 660uF total output capacity. The 1000W PRIME Gold unit has a 560uF and 470uF capacitor for a total of 1030uF.
It is interesting to note that the 850 watt Titanium PRIME model (reviewed in August 2016 HERE) has actually a greater uF output than either 1000W Platinum or GOLD models. The Titanium 850W model used a 650uF and a 450uF capacitor in the primary stage for a total output of 1100uF. In this case you certainly get what you pay for!
Seasonic have a well earned reputation for over specifying power supplies. We reviewed a Super Flower 1000W gold unit recently and it was equipped with two 470uF capacitors for a total of 940uF. Very few 1000W power supplies we have reviewed in recent months ship with a total of 1000uF in the primary stage.
