my 970 3975 from the beginning, ive installed it i think 1st week of Feb, has always had some coil whine, didnt really bother me, it was audible through the case which is about 1.5 ft away, but low enough and not frequent enough that i didnt worry too much.
 
Last night, the whine grew 5x, before it whined in certain game menu screens and other instances in games like cut scenes etc, now the whines so loud right when i open my browswer (chrome or firefox on the homepage) its pretty ridiculous
 
i am about to open up warranty claim
 
anybody else having issues with their 3975 that just popped up/magnified overnight? 

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i changed some "power saving" modes in my bios
 
the coil whine is gone, back to normal coil whine in loading screens etc

cant really tell you, because i couldn't guarantee i can duplicate and remember what i disabled and whatnot
 
my motherboard is a m5a97 r2.0 asus, went into advanced and changed pretty much anything that was on "automatic" to disable for CPU and north/southbridges
 
i believe i changed like 7-9 different things,
 
i should have gone and changed one setting at a time, but i was too eager to try it out and changed everything i could at once, then was amazed it worked so i kept it that way xD