Jump to content
Sign in to follow this  
stanggt00

Heat sink fan direction, in or out?

Recommended Posts

I have never really seen anything definitive showing which way a fan should be placed onto a heatsink until I was O/Cing my uncles computer. The H/S and fan were a set where the fan was blowing cool air onto the H/S. I swapped it and noticed the temps increase during stress testing. I havent tested it on my own rig just yet, but I currently have mine sucking the heat away from the heat sink. I am wondering, which way the rest of you have yours mounted? Have you ever seen a temperature drop?

__________________

Share this post


Link to post
Share on other sites
Guest scott

stanggt00,

 

Mine's blowing down into the heatsink.

Share this post


Link to post
Share on other sites

blowing in. i think i might be able to explain it, u see in a conventional HS the fan blows directly on the HS base, applying more air pressure on the heat source and thus spreading the heat. if u will reverse the fan it will suck the air from the surrounding including sides and the amount of the heat it will suck off the base will be nothing compared to when the fan is actually blowing on the HS base. there are heatsinks which allow 2 fans setup 1 blowing and 1 sucking, usually they also involve heatpipes. in this case a single sucking fan can work almost as well as a blowing one but i still dont think it would be as good as the "traditional" setup

Share this post


Link to post
Share on other sites

I have a 92mm panaflo blowing out on my xp-90 and my temps after playing Quake4 never go beyond 36C. My idle temp are usually between 27-29. When I run Prime95 the highest temp I have ever seen is 40C, which is way cooler than my old Barton.

Share this post


Link to post
Share on other sites
I have a 92mm panaflo blowing out on my xp-90 and my temps after playing Quake4 never go beyond 36C. My idle temp are usually between 27-29. When I run Prime95 the highest temp I have ever seen is 40C, which is way cooler than my old Barton.

 

My embarrasment. It felt like it was blowing away when in fact it was blowing onto the HS. My temps are close to yours with 41C under load in OCCT and 30C idle. I am putting 1.6V to the CPU right now with 250x10. Thanks again for the replies.

Share this post


Link to post
Share on other sites
It's Megamaid! She's gone from suck to blow! :shake:

 

LMFAO!!! i was thinking the exact same thing!!!!!!

 

the best movie in the world i tell ya.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...