Properly induced convection currents are
Why is it, Rod? If Dell's engineers can produce a fanless CPU heatsink
assembly in their new line of PC's and have heated air ducted out of the
main case with a temperature controlled backup fan at the end of the duct
that turns on only when natural convection currents don't suffice. I see
nothing silly about it. Last time I checked hot air rises, you should know
that by now.
And that sort of ducting can be quite effective WITH a quieter fan.
And is, if the temperature controlled fan has a need to turn on in the first
place. This is why Dell uses a temperature controller to vary fan speed.
Check some of their tower cases. Unfortunately, you can't get large
heatsinks, ducts, and proper convection currents to flow in a 1U and 2U rack
mounted server, hence the need for brute force fan cooling.
Rita