Question about air ducts

[jlin453]

Reading through the articles on the front page, this subject has caught my interest. One question though, does the air duct obstruct the air flow inside the case?


http://www.club3g.com/members/SherwoodGrnGT/duct.jpg

If the duct were placed above the cpu fan/hs, the circulating air would have to go below the duct to get to the exhaust fan right? Would that hurt anything?

I understand how ducts pointing at the cpu and gpu would help its cooling, but how does it effect the general air flow?

btw, by air ducts, I only meant to cut a hole on the side of my case and have a cardboard or other material duct to "guide" the air in.

[RedDeathDrinker]

A circular duct would have only a small effect on the airflow. A duct straight onto your CPU fan from the side of your case would lower your CPU temps more effectivly than relying on case airflow.....

I knocked one up from an old KFC drinks cup (plastic). I will get round to doing a proper one yet, although this one is very effective!

http://mysite.freeserve.com/reddeath/images/1-picture1.jpg

http://mysite.freeserve.com/reddeath/images/1-picture3.gif

[jlin453]

Would it help any if at the entrance of the duct you had a fan blowing air in? Or is the duct itself sufficent. Also, how close did you place the edge of the duct to the cpu fan?