| Cooler Master Hyper 612 PWM Heatsink |  |
| Reviews - Featured Reviews: Cooling | |
| Written by David Ramsey | |
| Wednesday, 27 July 2011 | |
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Hyper 612 PWM Detailed FeaturesAs with most coolers, the base of the Hyper 612 comes covered with a protective plastic film. When I removed it, a lot of adhesive residue remained on the base (left image below), which is not something I've seen before. Alcohol wouldn't dissolve the adhesive; I had to use an organic solvent (WD-40) and then clean that off with alcohol. The cleaned base is shown at the right. The residue could affect the cooling ability of the heat sink, but even if it doesn't, it shouldn't be there. Once the residue is cleaned off, we see a nicely finished, very flat base. It's not a mirror finish but the surface texture is too fine to be discerned with a fingernail.
The mounting hardware for the Cooler Master Hyper 612 PWM is a little unusual: two brackets screw onto the heat sink, and spring-loaded screws (which on this Intel bracket slide in slots to adjust for Socket 775, Socket 1155/1156, and Socket 1366 spacings) protrude through the motherboard. The little springs don't seem as if they will provide a great amount of clamping pressure.
The Hyper 612 comes with the now-common flippy universal backplate that has one side for Intel motherboards and another side for AMD motherboards. The heat sink's screws are secured by the nuts shown: you screw the nuts down (Cooler Master provides a small socket you can use with a screwdriver) until they reach the end of the threaded parts of the screws and stop. The little springs on each screw provide the clamping pressure that holds the heat sink to the processor. 
Inside the test system, the Cooler Master Hyper 612 PWM looks like a standard enthusiast heat sink. Normally, for testing, I'd mount heat sinks like this with the fan blowing upwards, since that's the orientation that would keep the heat pipes horizontal. But the Hyper 612's design has the heat pipes horizontal (i.e. running front to back, rather than up and down) in the "normal" orientation. This is a nice touch I wish more manufacturers would adopt, since heat pipes often work slightly better this way. Note that the fan hangs over the first two RAM slots in this X58 motherboard, so low-profile memory is a requirement.
Now that the CPU cooler is mounted, let' see how it performs.
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Comments
I'm pretty amazed that they get such good performance out of this unit, with the low mounting pressure they designed in.
A hint on the acetone - look for nail polish remover, which is frequently stocked by the female residents of the house.
I'm pretty sure that's wrong. Per Intel, accuracy of thermal measurements is greatest as you approach the Tcontrol point.
#download.intel.com/design/intarch/papers/322683.pdf
"PECI is most accurate near the maximum temperature (PROCHOT#) and it is
accurate enough for fan speed control in the TCONTROL range but it can be very inaccurate at low temperatures." pg 19
Same also applies for DTS. See page calibration and variance graphs on pg 8 and 9 of the document.
Given this, the thermal measurements are MORE accurate as you approach Tcontrol and less accurate and temps get lower. Therefor, the degree of accuracy is not constant, but rather temperature dependent.
"Although each processors DTS is factory calibrated, the accuracy of the DTS will vary from part to part and may also vary slightly with temperature and voltage."
#download.intel.com/design/processor/designex/324644.pdf
I was a little put off by all that. So many people said oh it runs cool it runs cool .. you can hit 4.4G with the stock fan. Sure.. you can but it certainly won't run cool.
Anyway.. overall a great review.