Blowing air directly on CPU or from the side?

Cooling Processors quietly

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littlebigman
Posts: 111
Joined: Tue Dec 11, 2007 8:54 pm

Blowing air directly on CPU or from the side?

Post by littlebigman » Sat Jul 10, 2010 4:08 am

Hello

In case the CPU on a fanless mobo like the Intel D510MO turns out to still need a fan to cool it, should I use a slow-running 12cm to blow fresh air directly on the heatsink or should it blow air from the side instead?

What about having two fans on the case: One intake to bring fresh air from the front, one outtake on the back, and have the air flow between the two and cool down the CPU in between?

http://img695.imageshack.us/img695/7990 ... wofans.jpg

Thank you.

BlackWhizz
Posts: 266
Joined: Wed Mar 31, 2010 8:19 am
Location: OV, The Netherlands

Post by BlackWhizz » Sat Jul 10, 2010 10:24 am

Board doesnt need any cooling at all. Where are you gonna put your PSU? It can cool that board easily?

littlebigman
Posts: 111
Joined: Tue Dec 11, 2007 8:54 pm

Post by littlebigman » Mon Jul 12, 2010 2:53 am

I'm using a PicoPSU to save space, so there's no fan from a regular PSU.

I'll play with a 12cm fan and see if that makes any difference.

Thank you.

Matthew
Posts: 21
Joined: Wed May 05, 2010 7:00 am
Location: Utah

Post by Matthew » Mon Jul 12, 2010 11:39 am

I think that any fan at any reasonable speed will cool that CPU just fine. Having two fans is probably unnecessary.

I have a similar board, an Asus at3iont-i. I thought that I would have to be clever putting it together, but I just put a 120mm fan right on the cpu heatsink, pushing air up, at only 550 rpm, and the cpu never gets above 35c. The case it's in has a lot of vents though.

I see in another thread that you're building your own case for this. I would go ahead and try different things with one fan, but I wouldn't spend money on two fans. You probably won't need it, as long as the hot air can get out of the case.

Good luck.
Matthew

Luke M
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Location: here

Post by Luke M » Thu Jul 15, 2010 2:06 am

According to the Intel manual you should be able to run fanless in a well vented case. It will run hot, of course, but with an $80 board I wouldn't worry about that. So what if it only lasts 10 years instead of 20. :-)

BlackWhizz
Posts: 266
Joined: Wed Mar 31, 2010 8:19 am
Location: OV, The Netherlands

Post by BlackWhizz » Thu Jul 15, 2010 10:15 am

littlebigman wrote:I'm using a PicoPSU to save space, so there's no fan from a regular PSU.

I'll play with a 12cm fan and see if that makes any difference.

Thank you.
Blow down on board and target board heatsink and picopsu.

littlebigman
Posts: 111
Joined: Tue Dec 11, 2007 8:54 pm

Post by littlebigman » Sun Jul 25, 2010 11:03 pm

Thanks guys. I'll experiment and see how it goes.

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