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Do you have to use a fan with your heatsink?

post #1 of 11
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I'm just curious to know that if a Q6600 can work on a heatsink without a fan.
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1zt BUiLD
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post #2 of 11
Sure, it can... but if you place the CPU under load the passive heatsink won't be able to dissipate the heat fast enough.
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post #3 of 11
no you need fan it's not going to cool, it will just get warmer and warmer
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post #4 of 11
you could... but would need an UBER high flow case, and even then, temps wouldnt be great.... and it would be so noisy it wuold negate the effect of not having a fan on ure heatsink
     
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post #5 of 11
Quote:
Originally Posted by FaLCoNJuS View Post
I'm just curious to know that if a Q6600 can work on a heatsink without a fan.
Quote:
Originally Posted by enri95 View Post
no you need fan it's not going to cool
No you don't need a fan.

There are, by the way, heatsinks designed to cool passively only.

But take a big boy like a megahalem or a venomous X and you can cool passively any processor, even overclock some of them


You don't cool with air going through, but with area of contact, the more contact with the air you have, the faster you will transfer heat.
Fans make cool air pass through the heatsink, rendering such transmition even faster...
post #6 of 11
Quote:
Originally Posted by Sircles View Post
you could... but would need an UBER high flow case, and even then, temps wouldnt be great.... and it would be so noisy it wuold negate the effect of not having a fan on ure heatsink

also wrong. You don't need uber airflow.

You heat the air around your heatsink. Warm air is lighter than cold air. Cold air goes down, warm air goes up. You move the air "passively" when cooling passively.

Search overclock.net for "fanless rig" or "fanless system"
your gonna find plenty of proof that you can cool without any fans anywhere near your hardware
post #7 of 11
Quote:
Originally Posted by EduFurtado View Post
No you don't need a fan.

There are, by the way, heatsinks designed to cool passively only.

But take a big boy like a megahalem or a venomous X and you can cool passively any processor, even overclock some of them


You don't cool with air going through, but with area of contact, the more contact with the air you have, the faster you will transfer heat.
Fans make cool air pass through the heatsink, rendering such transmition even faster...
well explained
     
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post #8 of 11
I have a build using an AC Freezer 7 pro on a stock clocked Q6600. No fan on the HSF, but it is located close to the rear 120mm fan port on the back of the case. The fan is placed in an intake configuration so it's blowing across the HSF.
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post #9 of 11
Quote:
Originally Posted by EduFurtado View Post
also wrong. You don't need uber airflow.

You heat the air around your heatsink. Warm air is lighter than cold air. Cold air goes down, warm air goes up. You move the air "passively" when cooling passively.

Search overclock.net for "fanless rig" or "fanless system"
your gonna find plenty of proof that you can cool without any fans anywhere near your hardware
You're going to find plenty of lower-power rigs being passively cooled. Oh, and the force of "hot air rising" is basically nil and can be counter-acted by the slightest of physical forces. The amount of airflow that you get from hot air rising is almost nothing unless the air is super-heated.


And yes, you can go fanless for a heatsink, it's generally not a good idea to go fanless on a complete system if it's not a low-power system, especially one that sees larger loads.

Servers are typically built with heatsink that have no dedicated fans on them. This is so if a fan were to fail, being a dedicated one to the heatsink, that CPU won't overheat. They are typically built with larger heatsinks with no fan on them and then there is an array of fans in the front and rear of the case providing the airflow for the heatsinks.
Edited by Shrimpykins - 12/29/10 at 8:07am
 
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post #10 of 11
Quote:
Originally Posted by Shrimpykins View Post
You're going to find plenty of lower-power rigs being passively cooled. Oh, and the force of "hot air rising" is basically nil and can be counter-acted by the slightest of physical forces. The amount of airflow that you get from hot air rising is almost nothing unless the air is super-heated.


And yes, you can go fanless for a heatsink, it's generally not a good idea to go fanless on a complete system if it's not a low-power system, especially one that sees larger loads.

Servers are typically built with heatsink that have no dedicated fans on them. This is so if a fan were to fail, being a dedicated one to the heatsink, that CPU won't overheat. They are typically built with larger heatsinks with no fan on them and then there is an array of fans in the front and rear of the case providing the airflow for the heatsinks.
Of course there are other forms of heat conduction involved, I just wanted to give and example, that's usually the most popular one since everybody learns that at school
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