Duct problem

[The Coolest]

I want to make a duct betwin a 80mm fan wich is placed on the outside of the case and the CPU the problem is that the PSU is in the way so I can't make a straight line duct, any one got any idia on how can I make the duct thing?

[The Doors]

I don't know like to do it, probably with a flexible plastic tube, but without a straight line duct you'll loose more of the fan airflow.

I hope it helps you ;-)

[cool_hand_joe13]

:) Why would you want to use a duct,sometimes there not worth the trouble.

[outhouse]

Ive never heard of a duct that raised CPU temps only stories of 3C to 5C cooler temp readings. If a straight duct will not work get some cardboard out and create one that will fit and with a little tape you will have either a rough draft to make a nice one or one that will do just fine the way it is. One benifit of cardboard is that you can see if the results are worth it before you make something more permenent but just to note this mine is cardboard and i'm happy to leave it be.

One thought try to lower the duct on your side case cover and have the duct running up at a angle to the CPU to help straighten out your curves as was said straighter the better.

[smash]

here's an idea, move the psu to outside your case.
it sounds like you have a case with the psu hanging over your
processer. if thats so moving the psu outside not only gives you
straight shot to the processer, but also removes the heat that
comes from the psu.
i've removed mine from my case and droped temps by a few degs.

smash

[The Coolest]

And where did u put the PSU at, on the top of the case? did u put it on an insulator betwin the PSU and the case? I don't think my power cables are long enough.

[ThePanda]

Originally posted by The Doors
I don't know like to do it, probably with a flexible plastic tube, but without a straight line duct you'll loose more of the fan airflow.

I hope it helps you ;-)

Where might I obtain such a "flexible plastic tube?"

[dugans]

Smoothest, gentlest curves possible is best.

I haven't taken a power supply out of my case, but I was running dual psu's for awhile..

For longer cables, cut your psu wires and splice some more in. Use good wire, same ga., etc!

I lengthened the wires on my second power supply and moved it on top of the case. Just sat there and worked fine.

[The Doors]

Originally posted by ThePanda


Where might I obtain such a "flexible plastic tube?"

I've founded a lot of flexible plastic tube in different size into a shop that sell stuff for building industry :D

[Szech]

You can see how I did my mother's duct off my project page here (http://fordpinto.homestead.com/CpuAirDuct.html). But my understanding is that if you're going to push air through, the inside of the duct should be smooth. Pulling doesn't seem to be too bad though.

[ThePanda]

Szech: That looks good. But does it short out anything it touches inside the computer? Also, are you pushing air down thorugh it or pulling air out of the case with it? It seems like the air pressure would back up the fan pushing, or there would be no air to pull pulling because it is fastened around the heatsink.

[Crazy Jayhawk]

Originally posted by ThePanda
Where might I obtain such a "flexible plastic tube?" Go to a hardware store and look for dryer duct tubing or something like that. It's cheap and flexible. :)

[ThePanda]

Here's another idea: What if I wanted to have a duct system completely separate from the rest of the computer (like a digestive system or something :) )? Air could go in through a filter through a Panaflo 120mm fan @ 30dB, through a straight duct to the heatsink, then out through a converging duct (or diverging or adjoining or whatever you call it) out of the case through a sucking Panaflo 120mm fan @ 30dB with a grill on it. I don't know how I would do this though. Maybe it would work to just take a single duct, and put a hole in it and stick the heatsink right inside the hole? That might work pretty good.. I guess I would have to make sure the ducting material was non-conductive.

Any comments on this idea would be appreciated..