why not?

[badgers]

why doesn't everyone use an 80 mm or 120mm case fan and duct it to the heat sink. It would be easy to get the same or greater CFM and there would be no dead spots like a fan bolted to a heat sink has.

is there something I am missing?

ps why not use active sound damping with a couple of op amps?

I mean this respectfully, but it seems as if this would "cut to the chase"

thank you for your time and have a good day

do you have to dummy the fan header on the Mobo since there isn't a fan there?

[CSaddict]

I have, by the sound of it, the same setup as Would has and I dont believe the ductwork would decrease the temp enough to equal the time investment that would need to be be made.

[William]

just becuase a fan has the same or higher cfm rating doesn't mean it will do better. Some of the 80s can't deal with the backpressure presented and consequently you get less airflow in the heatsink. The deadspot is there with a fan, but I have seen heatsinks that have two fans to eliminate it and they don't do a whole lot better.

[-=Godspeed9mm=-]

I run 800 Mhz Athlon..

I have Twin dual BB fans with heatsinks on the processor..

Above it i have a 90 mm fan in the case.

Last but not least, 2 system exhaust blowers.. 1 under my voodoo 3's heatsink, and 1 under my processor's heat sinks..
Nice little setup...

Only problem is my computer is not to grat fro a good OC.. and i dont want to gold finger it.. reasons being id rather save up for a 1.2 ghz T bird Epox mobo and just set the FSB...

Btw, my case fan it attatches to the Mobo's sensors. =)
I just used a Futaba Radio connector from a RC airplane of mine, spliced the wiers, and vola, easy disconnect, then removing the side of the case...