Air 540 h100i air flow question

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hertz

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http://www.imgur.com/wUyDaOL

The link above has a picture of my rig planned air flow setup. Is this a good setup? My radiator in push. And I switched the rear fan to intake to provide air for the radiator. Is this a good idea? Or should I leave it exhaust?
 
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JackNaylorPE

JackNaylorPE

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geofelt

geofelt

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You have a dilemma.

If you orient it to take in cool air from the outside, you will cool the cpu better, but the hot air then circulates inside the case heating up the graphics card and motherboard.
If you orient it to exhaust(which I think is better) , as you indicated, then your cpu cooling will be less effective because it uses pre heated case air. And... you want the rear fan to be an exhaust.
The objective is to get hot air out of the case asap.

Me. I would pay less and buy a decent air cooler.
It will be quieter, more reliable, and cool equally wel
 
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JackNaylorPE

JackNaylorPE

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1. Ya really gotta accept that the guys who build the things know what they are talking about .... be sure that they have tested it both ways and recommendations are based upon the results of those tests ..... if you don't accept their judgement, then you shouldn't have bought their cooler. Every cooler manufacturer says the same thing.

The new AIO from Swiftech, a company with years upon years of custom water cooling experience, shows their fans blowing down into the case

H240-X-DIMENSIONSX800.jpg


2. The air coming outta ya rad will be in the neighborhood of 28C....their is no component that can be "heated up" by 28C as everything in it will be running warmer than that.

3. I have found no component documentation for RAM, HDs, MoBos that says "keep below 28C".

4. The radiator fins only removes about 60% of the heat generated by the CPU (0.6 a 85 watts or about 50 watts... say 90 watts overclocked to 4.6 Ghz). The other 40% is radiated by shroud, tubing pump, block and MoBo surfaces. Do you wanna heat your GFX cards and everything else by 50 watts of CPU heat .... or have 150 - 300 watts from your GPU (each) , 10 watts per HD, 40 watts from MoBo, all being pushed thru the radiator that's trying to keep your OC'd CPU cool ? You bought a CPU water cooler because you were worried about cooling ya CPU and it's fighting still to stay at 75C or 85C ate your big OC.... your MoBo is at 43...RAM at 30, HD at 28C .... GFC cards at 65C .... have to ask yourself .... do any of those number cause concern ?

In a case like the Air 540 with 5 fans blowing in and one out, there will be a ton of air exiting thru all that grille space, ,.... you will probably see a complete turn over every 1 to 1.5 seconds

 
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hertz

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So should I have The fans on the bottom of the radiator pulling air from the top of the case? Or fans on top of the radiator blowing cool air from outside the case in?
 
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geofelt

geofelt

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I would orient the fans so that the radiator exhausts air up out of the case.

And, more importantly, I would have the rear exhaust air out the back of the case.

Corsair says the opposite because they are interested in max cpu cooling.
True enough, but you really don't need much cooling for haswell and modern cpu chips. It is the graphics cards that need the most cooling.
 
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JackNaylorPE

JackNaylorPE

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If that's what your thinking, then you should be water cooling the GFX cards instead if the CPU. However, while water cooling your GFX cards certainly brings lower noise, it does not get you more performance, at least not w/o hard modding the card and / or using custom BIOS. Air coming outta the rads will be 5-6C higher and it'd being mixed with 3 fans worth of 23C air.... so your average intake temp will be [3 x 23 + 2 x 28] / 5 = 25C ....

The impact on GFX cards will therefore be 65 - 23C (42 delta T) or 65 - 25C (45) .... or you get 95% (42/45)of the cooling on your GFX cards as you were the other way..... On the other hand, the impact on your CPU cooling will be the water temp - air temp or 33 - 28 (5C delta T) versus 33 - 23 (10C)..... with air blowing out as exhaust, your cooling efficiency is down to 50% (5/10)

As for fan mounting

http://martinsliquidlab.petrastech.com/Radiator-Fan-Orientation-And-Shroud-Testing-Review.html

Push Vs Pull - This depends on fan speed/power. The high speed fans at 2000RPM with a 38mm fan thickness provided the best performance in a push condition. The slow speed fans with 1350RPM with a 25mm fan thickness provided the best performance in a pull condition. I would estimate that performance line is likely to cross in the 1500-1700RPM range where they are equal. So.... slow speed = pull, high speed = push, medium speed = it doesn't really matter.
Click to expand...
 
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hertz

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I guess I'm in a tight Situation. I'm getting mixed responses on all my questions about this so I'll try every configuration you guys suggested to to me and I'll tell you which one was the best for me. I have a handy nh-d14 if this cooler doesn't work out for me. I'll try intake pull, intake push, exhaust push and see what twmps I get. Gpu isn't really much of an issue for me.
 
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Brandon Rogers

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Yes these people beat me to it. Use physics to your advantage. Heat rises. So use the back fan and top fans (h100i) as your exhausts and intake from the front and bottom. my AMD FX-8350 has NEVER gone above 39 degrees celcius while gaming. My case is a Corsair 760T and i have all the stock corsair fans except for my bottom intake which is a AF120 fan (doesnt come with a bottom intake fan) and i replaced the rear AF 140 for a White LED af 140 just like the two front fans are. H100i cooling my fx 8350 and a 750Ti card (for now) works great and stays cool! i also put the fans under the rad pushing air up and out of the case. Harder to clean but cools a little bit better.
 
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