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Case airflow recommendations?

post #1 of 12
Thread Starter 
I have a corsair 760T which i've recently put a custom water cooling loop in. I'm going to be finishing the build this upcoming weekend with a second 980ti and an additional 120.1 rad where the bottom fan is in the case currently. Since i'm going to be adding a lot more heat to the loop with the second gpu i wanted to get some opinions on the best air flow setup.

This is how i currently have my case setup. Currently my delta t at idle is ~2.5c and at full load ~12.5c.


Here is what i'm thinking of doing instead


Here is another option that involves flipping the ps so it draws air from within the case. I'm a bit hesitant on this one because the ps is going to be pushed towards its limits with the additional 980ti and i'd rather it draw cold air from outside the case.


Any suggestions on which setup i should go with? Possibly something different than whats in the pics?
    
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post #2 of 12
I would go with the middle setup. Best thing to do is to try it and remeasure your temps. It looks like you already have some baseline data. You just have to put in some leg work and flip those fans. Without testing, the middle setup looks to be the most practical. Testing will tell though.

Edit: I didn't notice the front had a radiator as well, I only saw the top radiator at first. I'm going to abstain as I am far from a water cooling guru and their are more knowledgeable members than I. Nice build though.
Edited by Depauville Kid - 10/25/15 at 10:14am
post #3 of 12
last setup but leave psu as is. you should get the best temps that way imo.

EDIT: i wouldnt add the bottom rad, you shouldnt need it, you have plenty of rad space to handle the extra gpu.
Edited by Radnad - 10/25/15 at 10:48am
 
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post #4 of 12
Thread Starter 
Quote:
Originally Posted by Radnad View Post

last setup but leave psu as is. you should get the best temps that way imo.

EDIT: i wouldnt add the bottom rad, you shouldnt need it, you have plenty of rad space to handle the extra gpu.

I realize positive pressure in the case is a good thing, but with only one fan exhausting compared to 6 intaking it seems like it wouldn't be enough? I need to get this right the first time since changing the top fans configuration is a real pain. I have to drop the rad, drain the system, and disconnect the hose going from rad to cpu. Only way to get access to one of the screws. The other stuff is easy to change.

I can probably still cancel the order for the bottom rad. You don't think it'd help to have it though? Its not like it costs much, just an extra $30 to have it and i already have spare fittings, hose, and fluid leftover from this build.
    
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post #5 of 12
With a full loop like you have there isn't nearly as much heat generated inside the case, and with positive pressure it is going to exhaust that case air through every crack and crevice it can. With rad space there is a point of diminishing returns and that 120 probably wont do much. If you want to test it you can unplug the fans from one of the rads and let it run passive and see how much your temps change. Also, your loop has a nice tubing layout now and the extra tubing might clutter the loop a bit imo.
 
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post #6 of 12
On any setup I had top fans I always had them on exhaust (less dust and more room for air leaving the case, at least for me) since your Corsair 760T is also in front I would have them draw cool air on it. Middle image, the setup you planed to do anyway.

There is one exception when I have top fan as inlet and all other fans, when I have blower type cooler on VGA card. With MSI afterburner or EVGA precision using custom Fan curve set to high rpm I get a massive exhaust, N/A in your case.
Edited by Use - 10/25/15 at 1:03pm
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post #7 of 12
Can you get an air temp reading of the air inside the case?


For best performance you want your rads to be taking in cold air.
post #8 of 12
Thread Starter 
Quote:
Originally Posted by Radnad View Post

With a full loop like you have there isn't nearly as much heat generated inside the case, and with positive pressure it is going to exhaust that case air through every crack and crevice it can. With rad space there is a point of diminishing returns and that 120 probably wont do much. If you want to test it you can unplug the fans from one of the rads and let it run passive and see how much your temps change. Also, your loop has a nice tubing layout now and the extra tubing might clutter the loop a bit imo.

Makes sense, i'll go with the rads intaking then.

I guess i should be a little more clear on my goals with the additional rad. I actually want to turn the led fans down and not have it negatively affect cooling too much from where it is now.The led fans look nice but they're noisy in comparison to the non led ones i have. I'd like to drop the fan speeds on all the led ones by about half. I figured a little more rad space would help with that seeing as i'm about to add a lot of heat with a second heavily oc'd vid card.

As far as the clutter i'm in agreement with you. I really like the way its set up right now and would rather not alter it. I don't think it'll look horrible with the new rad, but definitely not as nice. The tube running from my front rad to the pump would run to the new 120mm rad below instead, then another tube would be added from new rad back up to 90 degree fitting on the pump. They'd still be pretty straight runs.

edit: Just realized i'd have to redo the drain valve setup and buy additional fittings. Canceled the rad. I'll just live with the noisy fans for now.
Edited by Edge0fsanity - 10/25/15 at 3:07pm
    
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post #9 of 12
The last setup but don't change the PSU.
post #10 of 12
Thread Starter 
Quote:
Originally Posted by Holst View Post

Can you get an air temp reading of the air inside the case?


For best performance you want your rads to be taking in cold air.

I don't have a way to read the temp inside unfortunately.
    
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