Cooler Master UCP 900W

Internals

Opening up this unit we find a typical Acbel layout and heatsink design. We saw another power supply from a German company rated at 500W that used the same layout and reached an impressive 88% efficiency. With this power supply boasting the 80Plus Silver certification, we expect it to reach a similar level, so it seems Acbel has really made some progress during the last couple of years. Prior to that, we rarely saw anything but boring, mediocre designs from Acbel, which is why many of Cooler Master's previous products offered only average performance compared to the competition. Now Acbel seems to be pushing newer technologies, and we find several solid polymer aluminum (SPA) capacitors on the secondary side.

Looking at the overall build, and starting from the power input, we find a heavy-duty filtering stage, though several parts are not really secured to anything. The large sister PCB on the right side holds the standby circuit and uses reasonable quality parts. The main capacitors come from Hitachi, which is relatively common in high-end PSUs these days, although this time there are three capacitors. They are all rated at 390µF and 400V, and the three caps are a very nice addition.

On the secondary side, as mentioned above, we see many solid capacitors and a few from Ltec Taiwan. Looking closer at the PCB, there are some indications that there are six 12V rails, but two of the rails won't be in use since this is only a 900W power supply. There's little doubt that we will see a similar design rated at up to 1200W with six rails in the future.