Seasonic X-Series SS-460FL: 460 Watts of Fanless Powerby Martin Kaffei on October 20, 2010 12:01 AM EST
Seasonic uses the same basic design as previous X-Series models, but there are some changes in the details. Of course, you don't need two main caps for reaching 460W and a long hold up time. A cap with 390µF is more than enough and Seasonic has chosen a nice Nippon Chemi-Con device; there are more Nippon Chemi-Con caps on the secondary side.
You can see the heatsink for the VRMs and larger ones for all the semiconductors. The inlet filtering is extensive as always and the PCB is placed near the entrance to get an improved electrical isolation. The fan regulation is completely removed and the PFC-controller now sits on a sister-PCB as a THT-component, but there are still many SMDs (Surface Mounted Devices). A PS223 offers the safety functions on the secondary side. including OCP.