yea, I read that article and it convinced me to create a duct for my 1800XP. The temps really do come down. I creaded almost and identical duct (120mm on one end narrowing down to 60mm? Cpu fan)
My idle tems before were around 55C
Now the're at 46C!!!
I have a 3 way switch for my fans (12V, 5V, off). At 12Volts and with the duct work in place, the added push of air caused my CPU fan to go from 4600Rpm to 5700 Rpm. At night when I sleep I switch it to 5 Volts and it quites down a bit and the cpu fan slows to 4800Rpm.
took me a few hrs to get that hole on the side panel, its my first time making holes
made that cardboard duct thingy, and it failed to drop my cpu temp...dont know why.
so i'm gonna use those aluminium flexy pipe thing, whatever it calls, to lead from the cpu fan all the way to the side panel and no gap. where with the cardboard duct method there's a gap between the cpu and the cardboard ductor.