Internals

Even though the PSU is quite compact, the internals do not seem crammed with ample free space. And it's no surprise—the same PCB is also used by more powerful models of the power supply (namely the 1000 W version of that same PSU). Even without looking at the corner of the PCB indicating the markings of which wattage, but noting where there's one empty slot for a PFC capacitor, leaving the 680 uF / 400 V Rubycon alone. All remaining electrolytic capacitors are made by either Rubycon or Nippon Chemi-Con.


On the primary filtering side we see one Y and one X capacitor already soldered on the AC inlet / hybrid switch PCB. The remaining two Y and one X cap, two coils and a MOV can be found on the corner of the PCB.


Moving forward we find a heatsink-cooled dual bridge setup. A separate heatsink hosts the 6R190P6 MOSFETs.


The two daughterboards on the PSU are the modular connector board with some filtering caps (and more unpopulated space) and the DC-DC board to deliver the minor rail power, it also hosts the fan controller logic.


The back of the PSU reveals a dual-color PCB and some additional chips. Most notably these are the CU6901VPA resonant controller, the WT7527RA supervisor IC to handle the protections the PSU comes with and the CM6500UN PFC controller.

Overall the build quality of the power supply is excellent. The soldering quality is great, all cables are tidy and the coils and capacitors throughout the PSU are covered in goop to prevent any whine or squeal.


The FOCUS GX ATX 3.0 utilizes a 135 mm HA13525H12F-Z FDB fan (12 V, 0.5 A, up to 2000 RPM) with seven blades.