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Verax GmbH P16 Silent Heatsink Review
Verax GmbH P16 Silent Heatsink Review
Abstract: From the acoustic standpoint we have already established that the Verax fans are the quietest we have ever tested (on the order of 35dB).

 Manufacturer  Category  Published  Author 
Verax   Cooling / Heatsinks   Oct 14, 2002   Max Page  
Verax GmbH P16 Silent Heatsink Review

It wasn't too long ago that we first looked at heatsinks from the German born Verax Ventilatoren GmbH. Apart from the utterly unique design of the impeller in the Verax CairdB fans, what really made the P11T and P14 heatsinks standout was the almost complete lack of noise. Because of Verax's fan design, their heatsinks are literally silent - potentially the perfect heatsink for Zero-noise computing.

The heatsink we are looking at today follows in the same footsteps of those two other Socket A heatsinks, but this time it designed to keep a Pentium 4 processor running with essentially no noise at all. Pentium 4 processors are a little more forgiving when it comes to the higher end of the temperature envelope, but with the larger surface area of the heatsink we might not be seeing much of a penalty at all. Airflow is the one achilles heel of all the Verax heatsinks we have tested thus far - they don't move air as fast as with conventional hi-RPM axial fans. Instead, the revolutionary impeller design works by accelerating the air within the fan evenly, over a substantially longer distance than with standard fans.

From the acoustic standpoint we have already established that the Verax fans are the quietest we have ever tested (on the order of 35dB). Acoustic performance of that order comes with a price tag, retailing for $69USD through the only US distributor for Verax. For more info on the very cool looking fan you see below please se our review of the Verax P14 Silent heatsink.

Heatsink Specsheet:
  • Model Name: P16
  • Fan Specs: CAIRdB TYP80251231-KT2, 1600-3100RPM, 18CFM, 12V, 0.62A.
  • Fan Dim: 25x80x80mm
  • Heatsink Dim: 96x68x68mm
  • HS Material: Extruded Aluminum
  • Weight: 430grams
  • Mfg by: Verax GmbH
  • Cost: $69USD

Sold By:
    Heatsink Audio Sample Included.

    Rated for up to 2.8GHz Intel Pentium 4 processors, the Verax P16 has a few quirks which are unique to this kind of heatsink. The most obvious are the little metal clips used to hold the heatsink in the P4 heatsink retention mechanism, but the most important as far as we are concerned is the thermistor controlled CAIRdB 80251231-KT2 80mm fan.

    In a case environment, the fan relies upon the ambient temperatures to control how fast, or slow it rotates. At temperatures of around 20 degree Celsius, the 80mm fan rotates at abut 1700RPM. It is not until an ambient case temperature of at least 43 degrees Celsius is reached that the CAIRdB will reach full rotation of ~3100RPM.

    Since we test heatsinks in an ambient room environment a little adjustment is necessary to get the fan performing in a useful manner. Using a pair of tweezers, we nudged the thermistor from its spot in one of the fans braces and bent it over so that it projected out from the base. In this orientation when the fan is mounted back on the heatsink the thermistor should be in direct contact with the metal fins of the heatsink, and thus fan RPM will be determined by the metals' temperature.

    Getting back to the other part which stands out on the Verax P16, we found a clip like one we've never come across before. This small piece of metal (one on each corner) rotates around 360 degrees, and as you can see in the picture just above to the right, locks in under the plastic tab of a standard Pentium 4 heatsink retention mechanism. To be on the safe side, I would strongly recommend removing the Verax P16 if you plan on transporting the computer any distance. The clipping mechanism locks down heatsink firmly, but it doesn't really have a solid latching feel to it - so repeated vibration could work the connector loose in a shipping environment.

    Anyway, we've seen just a glimpse of the Verax P16, let's take a look at the rest of the heatsink now and see how well it performs thermally and acoustically!

    ° Next Page 

    Table of Contents:

     1: — Verax GmbH P16 Silent Heatsink Review
     2:  Close up look at the heatsink
     3:  Heatsink Test Parameters
     4:  Acoustic Test Results
     5:  Synthetic Thermal Test Results

    List all Verax heat sinks that Frostytech tested?

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