Thermaltake PurePower W0029 (350W)
This power supply differs strikingly from any other model I have reviewed so far on our site through the total lack of any fans. This unit is cooled by means of external heatsinks that consist of thin copper plates; heat is being transferred to these heatsinks via heat pipes.
The second heatsink is located on the front panel of the PSU (that is, it is going to be inside the system case in an assembled computer) and is much smaller. It cools the switching transistors of the inverter, while the external heatsink cools the output diode assemblages that heat up badly. The number of heat pipes differs, too. There are two pipes on the internal heatsink and three on the external one.
I also found rather large T-shaped heatsinks inside the unit, but I doubt their efficiency. They just warm up the air inside the PSU. It’s also not quite clear why the manufacturer didn’t establish heat contact between these heatsinks and the cover of the PSU – the aluminum cover might have added well to the total dissipation area. The power transformer and the group regulation throttle are not cooled at all.
The text on the PCB says who makes these units for Thermaltake. It is the same Sirtec that also manufactures Thermaltake’s traditional fan-cooled PSUs.