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Thermaltake Toughpower QFan 650W Review

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Temperature, Noise Levels and Fan Speeds:


I am not going to give a pass or fail in this section, as the ATX12V V2.2 does not really have any references on which to base a decision.

Temperatures are purely for information only, as there are too many variables involved when installed in a case, which, by the way, it wasn't. Ambient temperature, processor cooling efficiency and case cooling fans all play their part on the temperature of the air entering the power supply, and consequently the temperature of the air leaving it. No valid conclusions can be made from this test.


Thermaltake Toughpower QFan 650W @ 230VAC input

DC Loading
Temp In (°C)
Temp Out (°C)
Δ Temp (°C)
Fan Speed (RPM)


The Thermaltake Toughpower QFan 650W incorporates "QFan Technology" which I feel warrants an explanation.

"Special non-frame QFan Technology: decreases 17% noise level compare with regular 140mm fan. Toughpower QFan 500/650W power supplies come with our latest special design 140mm ball-bearing fan. This fan has outstanding acoustic performance that will not drive you crazy with high noise."

If you take a closer look at the power supply side panel photographs you will probably notice extra air intake grills, approximately fan thickness, all around the power supply. This is part of what Thermaltake claims is the world's first five way air intake housing which assists in keeping the fan noise  to an absolute minimum.

The user manual gives us some figures to chew over. Comparing the noise level of the specially designed open frame fan against conventional designs we are given the following noise levels at various power supply loadings and fan supply voltages.  Load 20-50%[4.75V] 17.1dB(A) against 20.7dB(A), 60%[6V]20.7dB(A) against 25.6dB(A) and at 60%[12V] 34.1dB(A) against 40.1dB(A). I cannot test any of these claims at this time. What I can say is the noise from the fan was very low but did increase noticeably, but was by no means loud,  at full load which is to be expected. The maximum quoted speed for the fan is 1900 RPM ±10%, the actual measured maximum, at 1775 RPM is within the given range.


  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specifications & Features
  4. Testing: DC Voltage Load Regulation At 110VAC & 230VAC
  5. Testing: Efficiency, Power Factor & DC Quality
  6. Testing: Temperature, Noise Level & Fan Speed
  7. Conclusion
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