Monitor noise?? Please Help...

[Bobski2000]

I have a PB 1508/n. Just recently bought 4gig of ram , installed that no probs... Got myself a PCIe Nvidia card 7000 series. And everything runs ok.

After reading the instructions for the graphics card it said that the PSU should be at least 300watts. So with this in mind i got a new PSU... The first one was 650watt, then i tried a 400watt.

Installed that which wasn't too bad.. Had to remove 2 stcks of ram to get the cable for the board in nicely, but then replaced them.

Now this is where all my troule begins.....

It seams that when the CPU is running at 100% there is a loud noise coming from the monitor, (Like the system beep you get when starting up a computer but higher and constant))Even with the sound cable UNPLUGGED the noise is coming out of the speakers on the monitor. When the CPU drops to 99% or lower the noise stops.

As you can image when the computer is turned on the noise is on for a while until the computer settles down.

This will be the second power supply that i've tried... I'm sure it cannot be the power supply. I'm now back on my original PSU. (With no Problems) What could be causing this?

Any help would be nice... Cheers Dave

 

[thefishdude]

well that is certainly a wierd one, never heard anything like that before, hmmm what monitor you using ?? and it has built in speakers ?

*** fact that you unplug sound sound cable and speakers still make noise is straneg sounds like some sort of electrical interference some how. ia gree it dont think it can be the psu though. as you have tried more than one

 

[Bobski2000]

hi,

Its a philips 190X5 with built in speakers...
I read somwhere that my motherboard has a power management thing but as of yet not tried it... Will try this first thing in the morning.

Really Weird!!

Cheers

Dave