TweakTown uses a different method for testing CPU heatsinks which allows for an even playing field across all product tests. We feel that by using the same ambient temperature and strict lab-like testing procedures we are able to accurately compare one product to another. More information on our testing procedure can be found in the T.E.C.C. article here.
As you can see, the Nexus XiR-2300 delivers big time performance and beats our Noctua NH-U12P in the single fan configuration. This makes it one of the highest performing CPU coolers we have tested and the best on load out of the box since the Noctua only comes from the factory with one fan.
Here we see that the XiR-2300 is a quiet heatsink and fan combo, but we have tested coolers that are quieter. The numbers, even though accurate and done in a scientific fashion, are a little misleading. Even though the cooler is not the quietest we have tested, there is a ceiling or in this case a floor for performance. The floor varies from person to person based on what they can hear, but even at full tilt I can't hear the fan on the cooler at 2 feet away.
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