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Thermaltake 350 watt Fanless Power Supply

Manufacturer: Thermaltake Technology
Supplied by: Thermaltake Technology
Street Price: TBA

by Dean Barker (9/18/2004)



Something that recently occurred to me was that over the past year, most cases and cooling components have begun to focus on providing quiet operation.  What is notable about this is that while everything is being geared to silence the fans inside most power supply units have increased in size and number.  It’s nothing to find a PSU with four 80mm fans or a 90 and a 120mm fan mounted to keep the PSU cool.  Frequently, the vast majority of fans in a system are inside the power supply.  Apparently Thermaltake noticed this oddity as well.  What sense does it make to install a super silent water cooler in search of silence while your power supply sports multiple fans?  Thermaltake has responded to this and is now producing a 0 decibel power supply unit.  Zero decibels you ask, how?  They accomplish this by removing all the fans and applying some of the heatsink technology we have seen in CPU coolers to their PSU.  Heatpipes, increased vent areas and high fin count copper cooling fins all do their part to make this possible.  Let’s look at the specs on this fanless wonder before we go any further.


  • Rated Power: 350 Watts

  • Observed Weight: 2.4 kg

  • Observed PSU enclosure dimensions: 150 x 149 x 85mm (not including externally mounted convection fins)

  • Cooling: None

  • Noise: 0 dBA

  • Construction: Aluminum

  • Colors: Available in Black

  • Number of Connectors: (9) four pin Molex, (2) FDD connectors, (2) native SATA connectors

  • Over Voltage Protection - recycle AC to reset
    +5V trip point < +7.0V
    +3.3V trip point < +4.3V
    +12V trip point <+15.6V

Thinking outside the box

When I first heard about a fanless power supply, I had my doubts.  When you get down to it, the hot air has to go somewhere and without any circulation how would it do this?  Thermaltake got around this issue by thinking outside the box or rather putting the convection fins outside the box.  The most notable feature you see right off is that on opposing sides of the unit are areas where copper convection fins extend out of the power supply housing (25mm on one side and 63mm on the other.)  Heatpipes conduct heat from the interior to these external fins where it will naturally rise up and off the fins.  An aluminum cage of sorts covers the sides of the rear cooling fins to protect them from being damage by bumping or banging them into something.




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