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Question on Blower and Intake Fans

post #1 of 7
Thread Starter 
First off, I was just wondering how significant the blower (top) fan really is. I know heat rises and all that, but I had always thought of it as more of a secondary fan. I have a 120 blowing like 100CFM in the front, an 80 blowing like 75ish in the back, and then the blower is an 80 pushing like 20ish. I was just wondering if it would be worth the extra noise, etc. to change the blower fan out with one that would push more like 70CFM. Also, I noticed today that my intake fan blows ALOT less air with the fan filter/grill on. I was just messing around and I put my hand in the case to feel how much air was blowing and it was pretty low for the size/speed of the fan. i took off the front panel, the fan filter, and the metal grill that holds on the filter and all of the sudden the fan was blowing all kinds of air. the second i put on any one of the three pieces (all are clean and dust free), it instantly drops by at least half or so. is this fan just sucky or what is the problem? thanks.
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post #2 of 7
Heat rises, so definitely taking as much air out from the top of your case is beneficial. IMHO your exhaust should be stronger than intake, exhaust is more important if you ask me.
    
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post #3 of 7
Welcome to the forum mate Go to "user cp" at the top of the page and fill out ya details.
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post #4 of 7
I have a filter covering my front intake fan as well and I did notice that it causes the fan to blow a little less air into the case.
I just prefer to have it blow less air as long as it also means less dust accumulating on the parts inside.
No matter how good the air flow inside your case is it just won't be beneficial if the parts are covered by a thick layer of dust that acts as a thermal insulator preventing them from releasing the heat into the surrounding air.

Check this guide about air cooling.
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post #5 of 7
Thread Starter 
cool, thanks for the info guys. i'll prolly bump up the blower fan then to a stronger one. i'm not too concerned about the intake fan, i'm def not removing the dust filter, i was just curious. thanks.
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post #6 of 7
Quote:
Originally Posted by r3tard
Heat rises, so definitely taking as much air out from the top of your case is beneficial. IMHO your exhaust should be stronger than intake, exhaust is more important if you ask me.
If you ask me, I say intake should be stronger. It keeps to dust out = lower temps
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post #7 of 7
Quote:
Originally Posted by bentrinh
If you ask me, I say intake should be stronger. It keeps to dust out = lower temps
You must be talking about positive pressure (intake stronger than exhaust).
Yes this would help in keeping the dust out, but still a good front filter helps a great deal.
You don't want to see the dust on my filter when I remove it for cleaning every 2 weeks. It's scary.
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