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Double radiators on bottom of case?

post #1 of 27
Thread Starter 
What are typical setups like these used for?

For example, what exactly does the loop entail and in which order?

How do you connect the two radiators that are literally parallel and about 2 inches from one another? Do you just use a couple of compression fittings and a small piece of tube or are there other ways?
post #2 of 27
Well, a lot of people do just use standard fittings and a small run of tubing for that use. However, there are these http://www.frozencpu.com/products/10744/ex-tub-669/Bitspower_SLI_Crossfire_Crystal_Link_Tube_Set_-_2_Slot_Spacing_BP-CLTAC-S2.html bitspower crystal links that are popular as well. It says that they are just for SLI gpu blocks, but people use them all the time in different configurations, as long as they aren't subject to movement. Just curious, you aren't sandwiching the rads, are you?
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post #3 of 27
Thread Starter 
I see.

What do you mean sandwiching?

Pics or explanation please! Sorry. :x
post #4 of 27
Quote:
Originally Posted by xyeLz View Post

I see.
What do you mean sandwiching?
Pics or explanation please! Sorry. :x

Like a sandwich: Imagine the slices of bread are the radiators and the ham/cheese are the fans wink.gif
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post #5 of 27
Thread Starter 
In this case the fans are the bread and the radiators are the ham. Is that an issue? How should it be?
post #6 of 27
http://www.xtremesystems.org/forums/showthread.php?220874-More-Radiator-Sandwich-testing

Read this testing! It is very extensive and posts tests/fans/requirements for fan static pressure and other items to help you when you sandwich radiators. It generally isn't recommended, as the air from the 1st heat exchange (rad 1) has to be blown through the second rad, thus making the "ambient" for the second radiator artificially high. Since heat energy flows down the concentration gradient (high amounts of heat-->low), it makes it slightly harder for the 2nd rad to work efficiently. However, from the looks of that testing, they make it work with some high static pressure fans, so I'd just read the posts there so that you can make an informed decision based on objective data smile.gif (what I always do and recommend!)
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post #7 of 27
Thread Starter 
Oh wow that website is awesome. Thank you.

I now realize that I wasn't planning on sandwiching at all. I guess I was confused. I was planning on doing three fans on each radiator and having both radiators in the same compartment, as seen here:

2separatew6bk.jpg

Is it optimal to have the fans pushing outside of the case for this or should I have them pushing air into the case?

The reason I ask is because from what I remember, if the bottom compartment of the case is completely separate from the top, wouldn't you want to bring in the cool air from the bottom and then vent out the top? The only concern I see is that if the fans were pushing IN the case, they would be pushing directly against each radiator and it would make jumbled air.

Are there tests on this or can someone offer some advice?

Thanks!

EDIT: Even just some logic here would be nice, haha.
Edited by xyeLz - 4/24/12 at 7:30am
post #8 of 27
As long as you are getting low ambient air into that space between the rads it won't matter. I have seen people put all the fans pointing in and then big fan(s) pulling out the heat and other doing what you have drawn with fans pushing room air into that middle space. The key is to have good air flow in either direction and not allow hot air to be stagnant in the middle. Just watch that you don't exhaust hot air and suck it right back into the rads.
post #9 of 27
Thread Starter 
Hmm, so what would you recommend?

I already own a Black Ice GTX 480 with eight 3000 RPM Gentle Typhoons so my plan was to get another Black Ice GTX 480 and potentially use 4 fans on each radiator in a push formation, each either pushing out or pushing in - but I don't know which is better. However, I have been considering the possibility of doing a push/pull on each radiator, which still means that I need to decide whether I should have:

#1) Radiator 1 and Radiator 2 BOTH push air OUT of the case (hot air out).
#2) Radiator 1 pushes air IN the case and Radiator 2 pushes air OUT of the case (in from one, out from the other)
#3) Radiator 1 and Radiator 2 BOTH push air INSIDE the case (cool air in).

If I do #1, then there will be that middle area where, with 3000 RPM Gentle Typhoons, a lot of air will be moving around. I don't know what kind of effect this would have.
If I do #2, then it's basically just air comes in through one and out through another - so one radiator will be cool and one will be hot - which from what I recall is not recommended.
If I do #3, it will be sucking a lot of air out and the middle area in the case won't have air blowing everywhere, but isn't the bottom of the case cooler, hence air should be brought IN?
post #10 of 27
You should do #1 or #3 for the reasons you stated. Since I am not clear on what kind of case or platform you are installing this into, it is hard to say more. Personally I think if your rocking 3k fans, you probably want to go with #1 and push through the rads to the outside and have it sucking air in the middle. That much air pressure could limit how well it works being so close together, the fans might fight.

Here is an example. Maybe you could PM the OP and get his feedback:

http://www.overclock.net/t/1092105/case-labs-th10-pedestal-black-noise/10

450
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