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One Fan - Inlet or Exhaust?

Last response: in Overclocking
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May 29, 2003 12:17:29 PM

I've got one of the gorgeous Atech AFT 6551 PC cases, which encases all the crappy beige DVD/CD drives in shiney blue acrylic.

Problem is there is only a single 92mm fan hole. Now I may in future cut some more holes with a dremel, but meantime should my single fan exhaust or inlet air???

Your thoughts please!

Rab.

More about : fan inlet exhaust

May 29, 2003 12:24:05 PM

I say exhaust (where is the hole located anyway?). So hot air can get out... cool air should be able to get in through small holes in the case.

My CPU fan spins so fast that it creates a wormhole :eek: 
May 29, 2003 12:27:53 PM

It's on the rear about 1/3rd of the way down from the top, alongside the all the port connectors and same height as CPU.
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May 29, 2003 3:35:23 PM

Motion Seconded( actually Thirded) - Exhaust!
May 30, 2003 3:08:44 PM

Then defenitly exhaust... will help to get hot air away from your CPU.

My CPU fan spins so fast that it creates a wormhole :eek: 
June 3, 2003 11:32:35 AM

agreed...I thats this topic 'exhausted' :tongue:

...apologies for the bad joke...

Trust me I know what I'm doing... ooops, grab the cat... (Click me name to see me spec)
June 4, 2003 4:31:43 PM

if there is already an exhaust fan on the psu, would an intake fan not be useful?
Force air into the case as opposed to relying on suction from one exhaust fan through small case holes/gaps?

XP2400+ T-bred
A7n8x Deluxe
512 TwinMOS PC2700 CL2
Q-Tec 450W Fual Fan PSU
WD100J
GeForce4 Ti-4200 64MB
3 Fans
17 screws
1 Stick of chewing gum.
June 4, 2003 11:51:37 PM

I'm with redoXan, if you power supply is already blowing out, then you need to force room temp. air in with the second fan. I cut a hole in the bottom of my case(3X5)and put a filter over it. An 80mm fan is installed directly over the CPU & Swiftech heatsink (screwed to the side panel)with a duct forcing the air though the sink. The sink gets a constant rush of room temp. air!!! The PSU has two exaust fans & there's one more 60mm blowing out the rear of the case. My temps for my 2.4B @ 166FSB (3.014GHz) runs in the mid 50's under full load & high 30's @ idle.


Bluesfan
June 5, 2003 2:21:31 PM

Well unless the PSU has two fans or lots of holes in the bottom a PSU would be a very bad heat remover. That is why with a normal PSU you can better use a exhaust fan then an inlet fan.

My CPU fan spins so fast that it creates a wormhole :eek: 
June 6, 2003 11:06:20 AM

true, but I think most modern psu's have either 2 fans, or are well "grilled" (if you pardon the pun!)

XP2400+ T-bred
A7n8x Deluxe
512 TwinMOS PC2700 CL2
Q-Tec 450W Fual Fan PSU
WD100J
GeForce4 Ti-4200 64MB
3 Fans
17 screws
1 Stick of chewing gum.
June 6, 2003 12:11:20 PM

My PSU is an Antec 340w (came as a part of my case, a Chieftec/Antec Dragon series - very good BTW), and has one fan to blow air out the back. It seems to work well enough as it is, and has even coped with my adding acoustic material above and beneath it without heating up measurably.

Then again, i'm not in front of that computer and might be talking ball-cocks, but from memory that's right.
I'll confirm this later the afternoon.

<A HREF="http://www.anandtech.com/mysystemrig.html?id=18108" target="_new">My Editing & Gaming Machine</A>
June 6, 2003 4:14:55 PM

I know a good way to grill PSUs. :evil: 

But that isn't completely true... a lot of people buy cheap PSUs which only have one fan and even high-end PSUs have single fan editions. And I have a fairly new Codegen 350W as second PSU and it almost hasn't any grills.

My CPU fan spins so fast that it creates a wormhole :eek: 
!