Re: Skybuck's Dream PC airflow story.


<jameshanley39@xxxxxxxxxxx> wrote in message
news:1184353138.289522.148440@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Jul 12, 1:35 pm, "Skybuck Flying" <s...@xxxxxxxxxxx> wrote:
I have a nice airflow story:

My case looks like this from the top:

two gfx cards can blow little bit of air out.
/|\ vertical rear fan blowing air out
| /|\
| | power air exit
| | /|\
| | |
+-----------+
| power | <- horizontal power fan blowing air up, half to top.
| sndblast|
Ogfx cards| <- graphics cards can suck air in left/bottom.
O <--cpu | <- cpu fan blows directly out on left/top.
| memory |
| space |
|<--hd's-->|
O<-holes->O<--- two side fans, bottom, top.
+------------+
/|\ /|\ air gates and filter in door as well.
|
|
I patched/closed these two holes on the left side near the HD.

Because the air was being blown in from the right and across the hd's and
immediatly out left.

I believe that was bad.

The cool air should then go to the back of the case.

So first I tried plastic stickers on the left side of the case.

But they would always get loose because of the air blowing them loose.

So finally I got smart... and I placed the stickers on the inside of the
case...

They weren't as sticky anymore... but they are still in place !

The air is simply helping keeping them in place since the air now blows
against them ! ;)

Ofcourse the stickyness helps too.

And it looks much better now too.. I can't even see the stickers anymore...
they see through plastic... only if I look real carefully do I see a bit of
shine from light ;)

I am happy with this solution.

Now the cool air goes from the front to the back of the case as it should.

The motherboard, cpu and graphics cards are now a few degrees cooler.

I also underclocked and undervoltaged my CPU that reduces about 20 degrees
of celcius temperature.

I also tried patching the other holes in the back near gpu/gfx card's... the
results were inconclusive... could help or could make it worse.

However patching the cpu hole would be bad.

It's good if the CPU can blow out it's hot air immediatly it seems ;)

Bye,
Skybuck.

I don't get the picture.. Or all of what you said, but you make some
interesting points.. i'm suprised underclocking made such a
difference. I'm sure i've done it and not found such a difference.
What processor, what speeds?

your kidding right? laptops do this very same thing via a single push of a button.(for
awhile now)


Regarding the CPU heatsink. It doesn't really blow its hot air out.
The fan sucks cool air in, and that air gets sent through the fins of
the heatsink. Test that it's an intake fan, by holding a tissue over
the fan.

I noticed that in a scott mueller video i found online or in his UGRP
book. Coincidentally, he also mentioned a spec designed at the time of
the Prescott(Hot processor), that utilised more air being blown out
than in. It had holes on the case which sucked cool air in , due to
the negative air pressure. The spec was meant to take over, he took
it seriously. The case had a funnel like thing on the side of the case
which went to the CPU for cooling it.
Another weird design of case i've seen pictures of, is with the PSU
on the bottom. That may not have been a standard though, could've just
been one adventurous designer.





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