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4x120mm or 1x200mm fan on 650D mesh - Page 2

post #11 of 22
Quote:
Originally Posted by tompsonn View Post

I swear they used to stock the 120mm GT's frown.gif
Problem with 4x120mm is going to be hooking them up... Eek... I could hook up a 200mm fan pretty easily... would there be a significant cooling difference between the two options do you think?

Yeah they did/do but they sell out that quick...also hooking them up, no drama's use a couple of y splitters.....

Here
post #12 of 22
Thread Starter 
Quote:
Originally Posted by smash_mouth01 View Post

Yeah they did/do but they sell out that quick...also hooking them up, no drama's use a couple of y splitters.....
Here

Ah easy peasy... smile.gif

What's your take on the top two as exhaust and bottom two as intake?
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post #13 of 22
Bottom intake from me my experience does little. You would also need a fan behind the hdd cage to push the air to your gpu. A 200mm fan on the side cools better because it pushes a large quantity of air but not at a fast flow so your component can use it

Sent from my brain using my fingers
   
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post #14 of 22
Thread Starter 
Quote:
Originally Posted by chinesethunda View Post

Bottom intake from me my experience does little. You would also need a fan behind the hdd cage to push the air to your gpu. A 200mm fan on the side cools better because it pushes a large quantity of air but not at a fast flow so your component can use it
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Did you mean so your component can't use it? If not, I'm terribly confused!

I have two 120mm fans behind the HDD cage already smile.gif
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post #15 of 22

I prefer four 120mm fans over a single 200mm fan.  The primary reason is that having four sources allows you to vary the speed of each fan individually to find out the optimal speed and configuration.  This is crucial to avoid hot air being pushed back before being exhausted and to minimize recirculation.

 

Click the diagram below.

 

tf3 cf airflow.JPG

post #16 of 22
Thread Starter 
Quote:
Originally Posted by windfire View Post

I prefer four 120mm fans over a single 200mm fan.  The primary reason is that having four sources allows you to vary the speed of each fan individually to find out the optimal speed and configuration.  This is crucial to avoid hot air being pushed back before being exhausted and to minimize recirculation.

Click the diagram below.

600x529px-LL-018ffe28_tf3cfairflow.jpeg

Wow...

Thanks!

I'm going to go down the 4x120mm road with each one separately controlled.

Is it OK to still have the two fans at the end of the HDD cages?

Would you suggest all 4 fans as intake?
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post #17 of 22
I meant so your GPU etc can use the air with a slower air flow

yes use all fans as intake if you want to go down that road, and still have the fans behind the hdd cage and make sure to take out the grills on your PCI slots so it will exhaust out the back passively.
   
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post #18 of 22
Quote:
Originally Posted by tompsonn View Post


Wow...
Thanks!
I'm going to go down the 4x120mm road with each one separately controlled.
Is it OK to still have the two fans at the end of the HDD cages?
Would you suggest all 4 fans as intake?


I think it is better to have one and only one direction of fresh air supply to the two cards. 

That is, if the two fans at the end of the HDD cages act as the main supply source, then the side panel fans are not to be intake.

On the other hand, if the side panel fans act as the main supply source, then the front two fans are not to be used.

The reason is:- one of the 2 directions needs not to be suppling air strongly so that hot air can escape more freely in that direction.

 

TF3 appears to be exhausting more via the front than via the side (ie along the length of the card).  (I make such assumption based on the orientation of the heatsink fins and the layout of the little heatsinks.)

So, I would suggest letting the hot air to exhaust out via the card's front.  As such, do not use the two fans at the end of the HDD cages.  This means, the four side panel fans are to be intaking, at least at this stage of investigating the best configuration.

 

Frankly, thermally managing two such cards is a little messy and requires a lot of patience as it is time consuming to do trial-and-error. 

 

post #19 of 22
having 2 fans behind the hdd fans is why I suggest having a 200mm fan because the slower air will be directed to the back of the case by the hdd fans and it will be used by the GPU and then exhausted out the back
   
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post #20 of 22
Thread Starter 
Thanks guys.

I'm going to try both intake and exhaust and with and without the two fans at the HDD cage end and see what happens! smile.gif
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