Internals

The PlatiGemini also needs only six screws loosened to reveal the internals. As suspected, it is a completely different and much more packed design than its cousin.


On the primary filtering side two Y caps are mounted on a separate PCB (vertical mounting on separate PCBs to more effectively use space is a common pattern for this PSU) where the AC power connector and the main fuse reside. On the main board we find two chokes, an X cap and a MOV. Further down we find a dual bridge rectifier with a heatsink in the middle.


The supervisor IC taking care of the PSU's protections is the IN1S313I, and just like the fan controller, sits on a separate PCB.


The PSU features two Japanese Nippon Chemi-Con 560 uF / 420 V as bulk capacitors. Other electrolyte caps are made by Rubycon. Overall there's a conservative amount of rubber goop applied around the capacitors and chokes.


Four 5R140P MOSFETs are used for the APFC switching circuitry.


The +12V MOSFETs (014N04LS) are placed on another vertical PCB right behind the main transformer. For the minor rails there's a DC-DC converter board in place.


The back of the PSU does not have any active components and overall shows a very good soldering quality.


The power supply uses a Zeta Group ZFB132512H ball bearing 135 mm fan, rated at 0.45 A at 12 V. The maximum measured RPM of the fan was just over 1800 RPM. The fan is partially covered with a plastic shroud to direct airflow towards the primary heat-generating components.