Fan direction help

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John Preston

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Feb 24, 2014
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Hello

I installed a corsair liquid cooler in to my case, with fan and rad on back. The fan is set up like it said in the instruction book as air intake as far as i know. Should it be the other way round?

Also real temp max temps are around 47-50c under load, is this expected?

Also is okay to take off the pump and check the thermal compound or would you then need to re-apply.
 
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Ranfty

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Jan 17, 2014
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Usually you would want fan configuration like this:

Fans pulling are in from the front...
Fans pushing air out at the top and back (as heat rises).

That will provide one of the best methods for good airflow around the case. You don't want just intake fans.

If you remove the block from the CPU, yes you will have to re-apply thermal compound.
 
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IRyannHD

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You can have it either way, I would have my setup so my fans blow through the radiator (from the inside) and push air out the top of my case. I exhaust the heat.
 
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Ranfty

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It depends where they're located. You can have fans on the front or bottom as intakes with radiators. And fans on top as exhaust with radiators.
 
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Ranfty

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Second this
 
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JackNaylorPE

JackNaylorPE

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Contrary to user expectations, Corsair H double rad series coolers produce just about as much cooling as the high end air coolers. Some can do better (i.e. H100i) but at extreme fan speeds. At same fan speed and noise levels, air coolers do much better.

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The paste used on the Corsair units is better than most ...as you can see in the 2nd image, when using the same TIM, the H100's performance at 2600 rpm drops from 50.5C with Corsair's TIM to 52.5C with the same one used on all the others putting it behind the Phanteks and Noctua air coolers which run at only 1200 rpm.

Radiators function and performance is dependent upon what is known as "Delta T" ... the difference between the coolant and the air going tru it. So if your ambient room air is 22C, your coolant is 32C and your case interior air is 27C, which one ya think will cool better ? .... the 22C air will be twice as effective as the 27C air.

 
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larkspur

larkspur

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I don't know what case the OP is using so can't give specific advice. But as JackNaylor pointed out - For maximum CPU cooling your should be pulling FRESH air from outside of the case and blowing it through the rad as an intake. If you blow inside case air through the rad it won't run as cool. One nice way of doing it is to mount the rad in back with the rad fan as an intake. Then duct that intake directly to one of the top exhaust vents. This creates a system in which maximum cpu cooling is obtained without dumping hot air into the case. However, not all cases have multiple top vents...
 
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Deuce65

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Well sure you can do it anyway you want; he isn't asking how he *can* do it he is asking how he *should* do it and the answer is as intakes. Why are you arguing about this? The air outside the case is cooler than the air inside the case so obviously you want to use the cooler air to cool the radiator.
You don't have to take my word for it, the people who built the thing said so right in the user manual.
 
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IRyannHD

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Well this depends on where he plans to put it in his case and also depends on the internal case temp in comparison to room temp.
 
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JackNaylorPE

JackNaylorPE

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I don't quite understand..... unless his case includes an internal air conditioner, or he's sucking in outdoor winter air via duct system, the interior case air will always be hotter than ambient room air.

say with Ambient air at 22C and coolant at 32C .... (I've never had a system which ran at < 4C difference under full load so starting there)

w/ case air at 26C, it would be 60% as efficient as using ambient air
w/ case air at 27C, it would be 50% as efficient as using ambient air
w/ case air at 28C, it would be 40% as efficient as using ambient air
w/ case air at 29C, it would be 30% as efficient as using ambient air
w/ case air at 30C, it would be 20% as efficient as using ambient air

I can think of no possible situation where case air would be cooler than ambient air so using case air will always be at a disadvantage .... the relative difference just determines how much of a disadvantage.
 
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Deuce65

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No, it doesn't! Why are you arguing about this? Obviously, cooler air will cool his radiator better than warmer air. This is a fact, not opinion. The air outside his case will always be cooler than the air inside the case. This is also a fact not an opinion. Therefore, he will get better cooling performance using the fans as intake. This is fact, not opinion!
And I will say it again because you don't seem to get it, IT IS IN THE MANUAL!!!!! Or are you seriously suggesting you know better than the people who made the thing?
 
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IRyannHD

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Unless he lives in Egypt :)
 
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