Articles: Cooling
 

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Protective plastic film covers the cooler base. It should be removed before installation:

There must have been pretty well-polished surface beneath this film, but since this cooler has been tested before it got to us, you can see a few scratches and tracks from the processor heat-spreader:

Though we can certainly explain the absence of the mirror-finish on the cooler base, we can’t say the same about uneven surface of it. By checking out the footprint thermal compound would leave on the glass surface and then the CPU heat-spreader, we can state that the copper base is slightly bent inwards on both sides, almost symmetrically:

 

We have checked out the cooler efficiency before we leveled out and polished off the base and after and we discovered that with a little extra effort on our part the cooler efficiency improved by 5-6ºC. Moreover, now that we leveled out the cooler base, we managed to increase the processor frequency by another 110MHz, which is a significant improvement even for our test CPU. Therefore, when you are buying a new cooler, take the time to check out how even its base surface is. Even in a computer store you can do it in just a few seconds with a credit card or any other plastic card.

The heatpipes are soldered to the cooler base in a very neat manner:

There is an aluminum plate above the heatpipes that serves as a foothold for cooler retention brackets.

Cooler Master Hyper 212 is equipped with a 120 x 120 x 25mm fan with nine falcated blades:

It is a Cooler Master A12025-20RB-3BN-F1 fan that is built using a slide bearing with 50,000h mean time before failure specification (over 5.5 years). The fan rotation speed is constant and equals 2,000rpm with almost 70CFM airflow and claimed 19dBA noise level. The latter value is hardly real, because Cooler Master have their own noise measuring methodology. We are going to discuss it in the appropriate section of our today’s article. But at this time I would like to say that the fan is really not noisy at all for its 2,000rpm. It doesn’t support PWM (fan rotation speed adjustment with pulse-width modulation).

 
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