RandyRick
 http://www.overclock.net/t/1094728/possible-fix-for-coil-whine Contains information on coil whine. It suggests that tweeking the voltage slightly may help.

I did also find this, but I tried increasing voltage ... nothing changed.
Someone said that he did 12 hours burnt in test or something, and it made coil whine dissapear. No idea how to do that.

To update this: someone provided me this answer from EVGA, when he had problem with 780 ti coil whine.
 

  Quote
We recommend testing your video card with another power supply, as often the power supply is a cause of noise issues. If the power from the PSU fluctuates, it can cause the coils to vibrate resulting in coil whine. You can check if the PSU is providing consistent power to your GPU. Go into your BIOS and look for the +12v reading. A healthy reading is between 11.4v - 12.6v. If you observe consistent fluctuations of more than .05 volts, the PSU is faulty and might be causing the errors.

 
I checked in BIOS and voltage was at 12.00V.
I was also able to monitor that voltage with MSI command center. When PC is at idle and nothing is realy going on, voltage seems to be at 12,000V, but sometimes jumps to 12,096V.
And when I run stress test or play games, that nukber will go to 11,904V. That's still between 11,4-12,6V and should be fine.
But what do they mean with that .05V consistent fluctuations? I'm not native english speaker so I don't realy understand this.
I tried to use differend 8pin connector, differend cable, differend expender, I even used that splitter, so I had pluged 2x 6pin to 1x 8pin cable that came with GPU. Tried every single combination of those cables, and voltage remains the same. 12,000 or 12,096V at idle, and 11,904 when gaming.
Should that be the problem? I mean it still in safe range for that voltage, and I was using it on previous GPU ... never had problems. But I don't know what voltages I had before because I never looked into this.
Also my PSU is pretty decent, so it should deliver power as it have to do.

ipkha
If you monitor the voltage on the 12v line, if you see constant changes of .05v or more. Under constant load conditions, the 12v line should be relatively stable. Check your readings when running the benchmark and see if you spot any trouble signs.

I was monitoring it, and it's stable at 11,904V when benchmark is running.

http://www.overclock.net/t/719397/on-ripple-and-its-effects-on-overclocking
 
The same author as the one who discussed -whine- in my previous link. This guy is an experienced engineer and provides relatively easy to understand explanations.
 
Points he makes:
 
1) the kind of voltage fluctuations that might harm the VR circuitry require an oscilloscope to see or measure.
 
2) he says:
 
The ATX specification sets these limits on computer PSU ripple levels:

+12V - 120mV
+5V - 50mV
+3.3V - 50mV
+5VSB - 120mV
-12 - 120mV

My personal preference is to see numbers in or under this range:

+12V - 80mV
+5V - 30mV
+3.3V - 30mV
+5VSB - 50mV
-12V - 80mV

Any power supply which has ripple outside of those proscribed by the ATX specifications can and will cause short term hardware damage (over a period of days to months, depending). Anything outside of my preferences may cause long-term reliability degradation and other issues, though it won't damage your hardware in the short term.
 
edit: that said. the VoltageRegulator circuit on the card is designed to handle voltage that isn't exactly 12v and convert it to the voltage required by the card. Which in fact is -tweeked- all the time by OC'rs
 
edit2: Copied from an evaluation of the Asus Hero Maximus motherboard sound system (implying smoothing out ripples is the intended job of a VRM and some noise is not unusual in the power)
"Crystal Sound 3. New for this generation is a new dedicated VRM for the audio sub-system. This change eliminates electrical noise from the power supply to the audio controller for more consistent audio performance. ASUS’ internal testing shows a substantial difference in power noise between the old design and the new. The Z170 Deluxe shows a noise level of 44.5mV compared to 134mV on other designs."
 

Simon771
Update: After 16 hours of running Heaven benchmark and pushing card to 100% all the time, coil is still here. Exactly the same, so burnt in test didn't change anything sadly.
I also got reply from caseking store ... they will not be accepting my card, because I voided warranty.
So my only hope is EVGA support directly. Already sent them email, and I can only hope that they will be friendly and solve my problem somehow.
 
Otherwise I just spent 510€ for nothing -.-

Voided warranty? What did you do to avoid warranty? 

Simon771
 
I removed stock cooler and put on waterblock.
With that I voided warranty.
 
It seems a bit confusing to me, since EVGA allows us to do that. When store receives my product, they don't fix it or anything. They send it back to EVGA.
Not to mention that sticker about warranty void if removed is on backplate and isn't covering any screws. So that sticker is still intact and not dammaged or removed.
I went to EVGA just because users on LinusTech forum said it's one of the best brand and flexible with warranty. But turns out that stores in EU aren't so flexible -.-

How did they even know that you removed the cooler if the sticker is in tact?
 

rjohnson11

CoercionShaman

Simon771
 
I removed stock cooler and put on waterblock.
With that I voided warranty.
 
It seems a bit confusing to me, since EVGA allows us to do that. When store receives my product, they don't fix it or anything. They send it back to EVGA.
Not to mention that sticker about warranty void if removed is on backplate and isn't covering any screws. So that sticker is still intact and not dammaged or removed.
I went to EVGA just because users on LinusTech forum said it's one of the best brand and flexible with warranty. But turns out that stores in EU aren't so flexible -.-

How did they even know that you removed the cooler if the sticker is in tact?
 

You'll have to go through EVGA EU for an RMA

Well I did send email yesterday to them, but I opened new ticket right now, because I didn't receive any confirmation about my first email being delivered.
I can only hope that EVGA guys will have some advice how can I fix it by myself. Or in worth case RMA.

Got coil whine on my 1070 sc too but it got reduced after 6 hrs of just leaving the pc in a game with 400 fps  so it isnt as annoying as it was when i got it.
 
But great card and nice fans they are really quiet and the temp is amazing xD 66c max with 20% fan speed
 
p.s fans starting making click noises but can be fixed if i stop them and then let them spin again.
 
(Card got rma'ed and got a new with less coil whine but still there and the fan clicking is gone too)