ITS NOT THE CPU. There is no components in a CPU that are capable of producing an audible signal! The noise is the power circuit/management board around the CPU. I can tell you this for a fact....go and talk to an apple engineer if you don't want to take my word for it. Apple have already a KB article telling you to take your MB or MBP to an apple service centre if you have the whine.
What do you think they replace when you do? the system board. Becasue as i have told you that is what is causing the issue! Maybe the boards needed to be changed to accomadate the chips that wasn't seen at thier design stage and hence maybe it is the chip causing the circuits on the board to whine. But that is not coming from the chip nor is it a fault with the chip its a design fault of the system board.