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How big passive radiator do I need to cool i7+GTX580? - Page 2

post #11 of 19
Quote:
Originally Posted by pionee;13491653 
Guys please!
I didn't mean I own i7+gtx580.
I just want the formula (TDP vs Surface area of Radiator), so that I will know how big radiator I need to make.

You need a computer modeling program to answer that question.

You have to account for many parameters. To do by hand would require some college level courses in engineering.
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post #12 of 19
I bet an evap cooler could be made passive and relatively compact.
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post #13 of 19
Honestly OP, I think you should just go grab a nice rad (360 or so) and put some Gentle Typhoons on the thing. They are almost dead silent and even at full speed are not really loud at all I should know as I got 4 in my rig running at full speed all the time. More like a gentle hum and the sound of air moving.
Edited by Lord Xeb - 5/13/11 at 1:14pm
 
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post #14 of 19
Quote:
Originally Posted by pionee View Post
the radiator can be 1 cubic meter big

OK, if I want, I can make it 10 cubic metre
Don't you mean square? A cubic meter would be ridiculous.
    
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post #15 of 19
This guy reminds me of the guy with 590 and i7 but was wondering if he could reuse his cable ties instead of buying new ones lol.
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post #16 of 19
Thread Starter 
Quote:
Originally Posted by systemlayers View Post
This guy reminds me of the guy with 590 and i7 but was wondering if he could reuse his cable ties instead of buying new ones lol.
we buy what we need, and we save what we can!

Do remember this !!
post #17 of 19
I tried passive on a TFC480 a while back. Even with a tiny 100 watt heat load, I eventually stopped the test because the water was getting too hot.

Completely passive just doesn't work on a regular radiator, you need a special passive rad with large open fins and possibly some sort of duct system to "Draft". That and the rad has to be HUGE! If a quad rad isn't even enough for half way decent temps at only 100 watts, you can imagine the heat buildup on something hotter. To get down to acceptable 10C water/air deltas, you would need something beyond big.

My suggestion, don't bother. Get some 500RPM slipstreams or something like that, your PSU will make more noise.

Here is that old failed test:


Edited by Martinm210 - 5/13/11 at 6:43pm
    
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post #18 of 19
Thread Starter 
Quote:
Originally Posted by Martinm210 View Post
I tried passive on a TFC480 a while back. Even with a tiny 100 watt heat load, I eventually stopped the test because the water was getting too hot.

Completely passive just doesn't work on a regular radiator, you need a special passive rad with large open fins and possibly some sort of duct system to "Draft". That and the rad has to be HUGE! If a quad rad isn't even enough for half way decent temps at only 100 watts, you can imagine the heat buildup on something hotter. To get down to acceptable 10C water/air deltas, you would need something beyond big.

My suggestion, don't bother. Get some 500RPM slipstreams or something like that, your PSU will make more noise.

Here is that old failed test:
Great info!

But I still wanna say, I am able to make a HUGE aluminum radiator. 10 cubic meters big is not a problem AT ALL. I'm gonna send this to my basement. I'll stick to the passive rad.
thanks martin.
Edited by pionee - 5/14/11 at 8:45pm
post #19 of 19
If you do make a 10 cubic meter aluminum radiator please post pictures I'd love to see that monstrosity.
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