G5 - Noise Options

[macmaster123]

Hello

I've got a question about using the PowerMac G5 for musicproduktion. I just got my G5 and everything seemed fine until I discovered some kind of chirping sound when I was using Cubase. Every time I moved the mouse and especially when holding down the mouse button on the graphic eq the sound became very loud. Also a tone keept repeating it selv once evry' second. These noises got higher when I turned the performance up HIGH insted of AUTOMATIC. After a serieus search on the net I discovered that this is a known problem for many users. But I've got a few questions :
1) Are there anyone who do not experience these problems?
2) Are there any other way to get rid of the noise than to use the "CHUD Tools Nap mode Fix - nap of" - and does anyone know if it is a serieus problem to do this "nap off" for a longer peroid of time. I know that the went is going to be running a bit more and it doesn't bother me, but is it a problem for the hardware inside the mac ?
3) How do you use the G5 for serieus music production, disabel the nao or live with the noise ?
4) Are there any reports of people getting less noise after replacement of the PS which seems to be the problems ? Any new supplies beeing produced ?

I'm quite frustrated and considering returning the mac, but I would really like to hear from you folks who are using the machine on a dayli basis... I'm a regular PC user who just made the switch to mac...