Quote Originally Posted by gOtVoltage View Post
It could be your PSU underload...

Mine dosnt sqeal and i run the whole system maxed with 11-120fans and two pumps and two Sata optical drives and 1 SataHD and 1 usb Printer @3.5ghz,,with a new GTX260/216 .

Im Also only using a 650watt PSU ATm and seems pretty good...

Your on a 620watt..It could be PSU being noisy or even the GPU4850 making a little noise....

I get no extra sounds though any devices..My sound is crisp and Clean ..I use a Audigy4 with Gaming headphones along with a 5.1 surround set up when i watch DVD's and burn disks.

Also in the BIOS i use CPU tweak enabled.. I dont overclock with AOD except to look at settings.

im using 2.8vdd and +4ACC ATM @ 3.514mhz 2400NB @ 1.65v cpu / 1.6v nb which gives me 1.55vid cpu and 1.46vid nb while using ACC.

I have not heard any sqealing or audio noise through my system with any Overclock i have done on the ASUS 79-T to date.

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i've also heard of the PWM sqealing a bit under lots of load? Could that be it?