I highly doubt the CPU will ever make any other sound than NULL or pff (when it burns).
Now, the sound is more likely to come from your moving parts, such as harddrive and / or fans. Unplug all fans (if possible) or just put your finger on the center (Hint: where there aren't any blades to slice you) and stop them... one at a time. Unplugging can be done while running, no problem... stopping MUST be done while running, hehe. No point in stopping a stopped fan, eh?
As for the harddrives, just unplug all (well...), reboot and listen. No sound? Plug them back in one at a time. Shut down, plug another etc etc. If you have more than one drive that is.
that flowed so smoothly, it was a poetic answer. you have enlightened me, seriously. funny how its an almost meaningless topic, and yet it can be ever so slightly modified to be a gloabaly-generic answer to many questions.
I'm pretty sure the deluxe MB has a speed control feature for the cpu fan header.
That whine is your cpu fan running full speed, probably 6200-6800 RPM. Backing off the over clocking until you get a quieter hsf will get rid of the noise. If the fan has a problem it usually sounds more like a rumble/vibration than a whine. Check the RPM under sisoft sandra or the asus utility.