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FrostyTech Says Noctua NH-C14 is better than the NH-D14!!!

post #1 of 9
Thread Starter 
FrostyTech has placed the NH-C14 as a better performing heatsink than the NH-D14. On a couple of other sites, the NH-D14 is still the leader when compared to the NH-C14. This make me question FrostyTech's reviews. This is not the only time this happens regarding their reviews. Is this because their testing is so different when compared to others (althought I can not understand how different they can be)? What do you think?
Edited by drBlahMan - 2/15/11 at 9:46am
post #2 of 9
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post #3 of 9
That's cause frostytech uses hot plates and the fact that the NH-C14 is a downdraft cooler
    
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post #4 of 9
Thread Starter 
Quote:
Originally Posted by Neur0mancer View Post
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post #5 of 9
Im sorry but I just don't trust frostytech
    
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post #6 of 9
To be honest, I always thought that FrostyTech looks a bit dodgy. :\\

I mean look at there "top 10" thingy at AMD, those 3 coolers that are rated ABOVE the Noctua NH-D14, I mean, seriously? Same counts, more or less, for the Intel list.
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post #7 of 9
Looks pretty scientific to me.

One thing I do not like about the reviews though is the heat block.

While it is more consistent than using a CPU to do testing with, it also is less likely to prove real world results.

For instance there are not a lot of chips that will hit 125W unless seriously OCed. Then again there are chips that will go way past 125W when OCed. Like all things performance high end heatsinks are designed with a particular statistic in mind.

Notice that in some reviews, a heatsink may have the best idle temps around, but once they get overloaded they fail horribly. Others might do poorly at idle temps but excel when hit with massive heat loads. IT all depends on what the heatinsk was designed for.

The heat block is also unrealistic in that it does not change. A heatsink with a fast response time will perform better on a CPU than on a heat block because of variations in internal temperatures. The test setup seems to favor high heat load sinks as well.

Lastly, the review of the noctua C heatsink mentions that it can use the stock fans or the 140mm fans. It says it will use both but only posts one set of results. If it is with "aftermarket" fans then the results are skewed and would explain why people think the testing is flawed.

I really like the top down design though. Ever since running my 4890 and finding that overclocking was only limited by VRM temps I have been meaning to get a top down style cooler for my motherboard.
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post #8 of 9
well that blows as i just got a D14 like 3 days ago

C14 has 2 140mm fans blowing straight at the CPU while the D14 has one 120mm and 140mm blowing 90 degrees away. all that extra blowing has to account for something
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post #9 of 9
I have a solution for this heat load to performance question/issue.

It is not hard to vary the heat being put out by a resistive heater and measure the electrical input.
If one uses a meter that measures the current and voltage, then changes in resistance are negligible, if one is using ac input then add a variac before the power meter.
It is easy enough to insulate the heater so that similar loads are taken by the different heat sinks for the same electrical input (even if the temp of the heater is higher for one heat sink at a heat load and lower for another heat sink at the same heat load.)
Now generate data points by mounting a heat sink and measuring the steady state temps at different loads.
Mount the other heat sinks in the same fashion and be sure to conduct the test with the same physical orientations as would be seen in your reference enclosure.
Better yet, make a mock up of an enclosure to include air flow effects that may reduce the fan effectiveness because of physical orientation.
Plot the data points and look at the difference in the temperature-ambient vs heat load.
It would probably be best to measure the temperature at the center of the base between where the heat sink would meet the cpu
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