Advice needed on airflow

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18 Apr 2012
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HI,I have got a Inwin dragonrider case with front,side,top and cpu motherboard fans and am going to install a silver arrow cooler and would like advice on which would be the best way to mount it,would it be best to mount it horizontil blowing towards the back fan or horizontil blowing towards the top fan as would this cause a problem as the fans are blowing in both cases in the same direction,thanks
 
In a case like yours AFAIK it's not the whether the fan blows horizontally or vertically on the CPU cooler that will make the biggest difference in CPU temps., but how the heat pipes in the coolers base sit in relation to the die of the CPU. I would've thought that most coolers similar to the Silver Arrow are designed to work best when the fan blows horizontally (towards the back of the case), of course if no-one can give you any information as to which is best for the CPU you have and if you're really bothered you could try both ways and test under load. IMO as long as both the top and rear fan are blowing out then either way should not cause any problems concerning the temp. of your CPU.
 
I know it's debated all the time but I don't think heat pipe orientation makes any difference. Looking at top coolers shows some have 'U' facing front to back and some have 'U' top to bottom and fans blowing with and across 'U'.

Noctua called Legit Reviews on their testing of NH-C12P so they retested and found:
pipes down 34 & 50c
pipes up 32.75 & 49.5c
pipes back 32.75 & 48.75

If we use a 1c margin for error there is .25c difference. :rolleyes:
 
With tower coolers, the orientation shouldn't matter too much but I always recommend blowing towards the back fan rather than the top as it complements airflow better.

I know it's debated all the time but I don't think heat pipe orientation makes any difference. Looking at top coolers shows some have 'U' facing front to back and some have 'U' top to bottom and fans blowing with and across 'U'.

Noctua called Legit Reviews on their testing of NH-C12P so they retested and found:
pipes down 34 & 50c
pipes up 32.75 & 49.5c
pipes back 32.75 & 48.75

If we use a 1c margin for error there is .25c difference. :rolleyes:

Actually with top down coolers, orientation impacts performance quite a bit. Under heavier load than what Legit Reviews use, there can be quite a difference. I had a chat with Noctua about this when I reviewed their NH-C14 and found that having the end of the heat pipes facing sideways gave much better temperatures than having the heat pipes face downwards. They stated that having the heat pipes face up would give better results but I couldn't have that orientation in my case.
 
I always recommend blowing towards the back fan rather than the top as it complements airflow better.
A good general rule... one which I have not followed in my build. Reason being cooler & fan size versus back vent size. I believe in removing hot air from case as completely and easily as possible so used the top 140mm x 280mm top venting (duct is size of TY-140 perimeter) instead of the 110mm x 110mm rear vent.

Actually with top down coolers, orientation impacts performance quite a bit. Under heavier load than what Legit Reviews use, there can be quite a difference.
That's good information to know, thanks. I was commenting on
how the heat pipes in the coolers base sit in relation to the die of the CPU
more then anything and shouldn't have used NH-C12P as example... Was first I found.
 
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