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Heatpipes and Rotated Motherboards

post #1 of 12
Thread Starter 
I have a question: are heatpipes that run parallel to a cooler's length (think of the Silver Arrow or NH-D14, on which the heatpipes go from the base forwards and backwards to the two fin stacks) affected by abnormal motherboard mounting, such as that on Silverstone's Fortress and Raven series cases? I have heard that orientation can severely affect heatpipes' ability to transfer heat.
post #2 of 12
No, direction has no effect on heatpipe performance/functionality.
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post #3 of 12
Thread Starter 
Is there anyone with an FT02 and an NH-D14 (or RV02 or Silver Arrow) who can confirm what pbasil1 just said?
post #4 of 12
Benchmark Reviews reported that they found a 3c difference on a Megahalems, with the heatpipes running side to side doing better. Nice theory. Is it true? They promised a whole article on the subject. I'm still waiting.

I hope you get an answer to this question, because the FT02 is a very attractive option.
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post #5 of 12
Thread Starter 
If I recall correctly, Benchmark Reviews thought that the reason it was cooler mounted at a 90 degree angle was that more heatpipes were directly over the core. Besides, the Megahalems would be less affected by the orientation because the fin stack is directly above the base. In the NH-D14 and Silver Arrow, the stacks are not directly above the base, and gravity would become a factor when the cooler is directed upwards.
post #6 of 12
Quote:
Originally Posted by steddy View Post
If I recall correctly, Benchmark Reviews thought that the reason it was cooler mounted at a 90 degree angle was that more heatpipes were directly over the core. Besides, the Megahalems would be less affected by the orientation because the fin stack is directly above the base. In the NH-D14 and Silver Arrow, the stacks are not directly above the base, and gravity would become a factor when the cooler is directed upwards.
The fin stacks may be over the base in a Mega, but the heatpipes go to the edges of the finstacks. That said, you probably do get more separation in the two-layer coolers. I haven't measured those gaps yet.
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post #7 of 12
It depends on the heatpipes. Good heatpipes with wicking inside are not affected at all. Cheapskate heatpipes that depend on gravity and grooves to pull the fluid back to the heat source are very badly affected.
We get this question all the time over at the case club.
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post #8 of 12
Quote:
Originally Posted by allikat View Post
It depends on the heatpipes. Good heatpipes with wicking inside are not affected at all. Cheapskate heatpipes that depend on gravity and grooves to pull the fluid back to the heat source are very badly affected.
We get this question all the time over at the case club.
Now that is very interesting info. So maybe the reason Benchmark Reviews never did the follow-up article is that there is nothing to their theory.
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post #9 of 12
Quote:
Originally Posted by steddy View Post
thought that the reason it was cooler mounted at a 90 degree angle was that more heatpipes were directly over the core.
Quote:
Originally Posted by allikat View Post
It depends on the heatpipes. Good heatpipes with wicking inside are not affected at all. Cheapskate heatpipes that depend on gravity and grooves to pull the fluid back to the heat source are very badly affected.
We get this question all the time over at the case club.
I can confirm both of these aspects as having an effect on temps.

The more heatpipes that run directly over the CPU die, the better. Also, some cheaper heatpipes are affected by gravity.
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post #10 of 12
Thread Starter 
Thanks for all your replies. I suppose there's not really any way for me to know what kind of heatpipes a cooler has, although I would hope that the more expensive coolers such as the two I mentioned would have the better kind.
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