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New Case - Which fan should push, and which should pull - Page 2

post #11 of 16
I'd say use the stock fans in various combinations. That 230mm front fan has to deliver lots of air at low rpm - that means quietly. Only after you have used stock should you buy replacements.

Use stock fans for the D14 for a while. See if your As.s board will allow you to control fans with Voltage. Play with the HAF X fans. Compare temps. You can't know everything in advance.
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post #12 of 16
Quote:
Originally Posted by Miekster View Post
Also, Speaking hypothetically, I drop a NH-D14 in here instead of the H-70. Here's what I"m thinking for my fans:

Intake:
HDD 200mm Fan
Side Case 200mm Fan
Top front 200mm Fan

Exhaust:
Back 140mm Fan
Top back 200mm Fan
(With the NH-D14 pushing towards the back exhaust.

What do you think (I know you're a fan of covering up/blocking the top back, but I can't see why it'd benefit to use not a fan one way or another).
With the arrangement in the above quote, several undesirable effects might happen:- (see colour-coded pic below)
A. When air is passing through the NH-D14, portion of this air is being pulled up by the top rear fan. This premature departure is not desirable because air is best to pass through the entire heatsink fins to absorb heat before leaving. This obviously reduce the cooling performance.

B. When hot air is exhausted by the top rear fan, this hot air is very likely be sucked back into the case by its adjacent case top front fan. Their proximity almost gurantee this to happen.

C. The only benefit of having the top rear fan is that it extracts hot air exhausted at the rear of the NH-D14. This is path C in the pic. This is negligible because the air needs to make that 90-degree turn and most (99%?) will just go straight out of the case via the rear 140mm fan as this is the path of least resistance.

D. If the case top rear fan is setup as intake, then it is likely to suck in hot air exhausted from the rear of the case. If your case sits close to a wall and/or lacks of ventilation from behind, this is very vulnerable. See the yellow arrow.

In light of the above 4 considerations, case top rear fan is not helpful.
But as ehume already suggested, just try it and see it for yourself.
post #13 of 16
Thread Starter 
Well I'm using my stock fans right now with a fan controller.. with a Corsair H50 on my Q9650 (stock... no OC) my CPU maintains an average of about 47 degree's Celsius... my case temps at the back top fan (exhaust) is around 33 degree's and the back fan (i have as an intake) is also around 33 degree's, My HDD with the 230mm fan is 26 degree's (three HDD's in it, two raided so not bad) and it's around 27 degree's where my power supply is.

Once I get the new mobo (Maximus IV Extreme-Z [their new Z68 platform] with the i7 2600k and D14 we will see. I"m assuming it's only going to get hotter though, especially since I'm going to be pushing 4.6ghz- 4.8ghz average daily use.


Sorry, edited... he posted while i was typing.

Well crap... i bought this case for both of it's top fans, thinking they would be great... see otherwise now. I regret buying it now.
Edited by Miekster - 6/17/11 at 7:40pm
post #14 of 16
Quote:
Originally Posted by Miekster View Post
Well I'm using my stock fans right now with a fan controller.. with a Corsair H50 on my Q9650 (stock... no OC) my CPU maintains an average of about 47 degree's Celsius... my case temps at the back top fan (exhaust) is around 33 degree's and the back fan (i have as an intake) is also around 33 degree's, My HDD with the 230mm fan is 26 degree's (three HDD's in it, two raided so not bad) and it's around 27 degree's where my power supply is.

Once I get the new mobo (Maximus IV Extreme-Z [their new Z68 platform] with the i7 2600k and D14 we will see. I"m assuming it's only going to get hotter though, especially since I'm going to be pushing 4.6ghz- 4.8ghz average daily use.


Sorry, edited... he posted while i was typing.

Well crap... i bought this case for both of it's top fans, thinking they would be great... see otherwise now. I regret buying it now.
Have no regrets. You bought a wonderful case. I wish I had room for such a case.

Do try various combinations. With access to stiff sheets of plastic from a hobby shop you could even separate the case in to cpu and gpu zones. I'm coming to the opinion that with gpu's exhausting so much air forward, a side exhaust might improve their temps. But this would harm airflow through the cpu. Hence separate zones.

What you are really bemoaning is that you have a huge number of choices. A brother of mine once said that providing people with choices is cruel. Maybe he's right, eh?
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post #15 of 16
^this.

One strong benefit of having case top fans is that they allow the possibility of having the CPU cooler pointing north.
post #16 of 16
Thread Starter 
options both suck and are great lol... some times you just wish there was only one way... the right way.
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