High-pitch With Firewire Options

[iShawn]

The problem I am having is noise that the computer is making when the firewire is plugged into it with the Firepod. When the power cord isn't plugged into the computer, the noise ceases but when I plug the firepod into it in any combination of the firewire outs, etc I get this noise. This noise stops for a second when I click on something or other wierd actions like that.

Anyone have a solution?

[fictionmusic]

Her is the explanation I got from a poster on yahoo LUG group last year.
It was posted by a musician named Rob Yale and here is his take on it

ÈWhen you turn off the Nap setting in CHUD tools, you disable processor
cycling. Because Apple put a cheap transformer coil in the power
supply, the processor cycling induces RF which propagates throughout
the G5. My guess (and backed by a friend of mine, former electronics pro and
now IT...) is that (cheap) filter coils in the PSU start to vibrate,
similar to loudspeaker coils, when the CPUs switch between high and
low power use, which can happen very often at 2 GHz clock cycle. Since
disabling CPU napping results in the CPUs consuming a fairly constant
current, the vibrations stop (the magnetic fields in the coils remain
constant).È

I have used CHUD tools for over a year now (in my menubar as recommended by iShawn) and have had no ill effects. My system has been rock solid and totally quiet. (I have it on 24 hours a day pretty well 7 days a week, in a busy producton suite)