Update:
Got my new Supernova G2 850w installed, unfortunately there is still coil whine present and it's at the same audio level it was before with my previous PSU.
Never had and problems with my previous graphics cards (Asus & MSI) this being my first time with Evga. Seem to be all down to a luck of the draw
Evga said they would be happy to start the RMA process if the PSU didn't help. I'll update once again as soon as I get a replacement...fingers crossed!

I thought as much, thanks for the info Adger...Hopefully my next one is a little better because I want to stick with Evga, given the fantastic support I have revived from them over the past week.

Update: I've switched from the Corsair PSU CX 750 back to SeaSonic XP2 860W Platinum, and the coil whine is absolutely gone. 0 coil whine even at 165 fps. So the issue was the PSU in my case for sure.

Would I buy it again, Im not sure, I mean, the coil whine to me is really annoying especially since its louder and more noticeable than the fans by a good margin and eliminates the whole quiet selling point of the card, but I dont have spare power supplies or graphics cards to test so I cant be sure whether or not its the fault of the card or psu. That being said, I bought an EVGA 550watt g2... Which is rated highly on every review site Ive visited and received a 10/10 on Johnny guru. To me itd just be weird for their power supply to have issues with their graphics cards, but who knows. So I probably would have just gone for a card more known for silence in regard to coil whine.
 
Apart from the coil whine, the card seems pretty decent. I have a small niggle with the lights being diffused somewhat poorly hurting the generally pleasant aesthetic appeal of the card, buts its not that big a deal on my card (though I know it varies) and it still looks better than a lot of other cards. 
 
 

Well it's like Adger and other said, seems to be a combination of gpu and psu. Some PSU's might help some cards, others might just have coil whine no matter what the case.
I haven't had any problems with diffused LED...if your using the Evga precisionX software, you could increase the lightness of the colour led your using which might help.
 
Should be a week or so now till my replacement comes.

EhCanadian
I did talk to them. They suggested running a benchmark for a few hours then rmaing so I did, then got a new card and it sounded the same =/ So, Im guessing given Ive seen some people report no coil whine, that the evga powersupply has problems with the evga card -__-. Too bad I cant return it and I dont want to have to buy another powersupply without knowing which one wont cause the whine so Il just live with it.

 
Why don't you take your card to a friend and test it there to see if the coil whine is still present.

GhostlyBG

EhCanadian
I did talk to them. They suggested running a benchmark for a few hours then rmaing so I did, then got a new card and it sounded the same =/ So, Im guessing given Ive seen some people report no coil whine, that the evga powersupply has problems with the evga card -__-. Too bad I cant return it and I dont want to have to buy another powersupply without knowing which one wont cause the whine so Il just live with it.

 
Why don't you take your card to a friend and test it there to see if the coil whine is still present.

That requires a friend

zyther
When you received your rma, was the replacement card brand new?

Seemed like it was. It came still with the plastic film  though the packaging was different and it had hard plastic instead of the shaped black foam.

zyther
Have you reran the benchmark on the new card to see if it helps lower the whine?

 
I didnt. Just played on it for a few hours and it sounded about as loud as my original card (which to my hearing didnt change in volume) I first got it so I repackaged it to return. Actually shipping it off today.

KOWHeigel
My first 1070 FTW had absolutely horrible coil whine. I have a EVGA G2 750 power supply. I even tried it with another power supply, same thing. I RMA'd the card and I am happy to report that the new card has zero coil whine. :) 

Great news! ..This has made me little more hopeful that my replacement will have less/no coil (I'm using the EVGA G2 850).
 
I have only just sent my 1080 off today, how long did it take to get your new card from Evga?

KOWHeigel
My first 1070 FTW had absolutely horrible coil whine. I have a EVGA G2 750 power supply. I even tried it with another power supply, same thing. I RMA'd the card and I am happy to report that the new card has zero coil whine. :) 

Thats... oddly disappointing to hear. I have the same evga g2 except the 550watt myself, and my replacement had the same level of noise, but I doubt id get another replacement, and definitely dont want to play the lottery and end up getting another card with the same noise... 

Adger
Hi all OP here.. i said id update and here i am.
Put the FTW in bout 5 hrs ago,ive done plenty of benchmark tests (Firestrike,Valley and Heaven Benchmark 4.0) and im very impressed.
Coil whine yes i do have it but..its very,very slight,i only have it in GPU intensive stuff benchmarks, GTA V,Witcher 3 etc ..and im only on a Corsair TX650 PSU.
Boosted to 1987Mhz without touching anything. after a slight OC +40 on the core clock and +45 on the memory clock ,and a custom fan profile it boosts to 2025 and 4050 on the mem.
I haven,t even touched the power limit. Eats games for breakfast runs everything beautifully on my U2715H Dell 2k ultrasharp. I7 4790K cpu
Anyway to cut a long story short im very very happy with this card..it oozes class. The packaging,the folder that comes with it with your bits and bobs in ..everything just looks so good.
This is my 1st EVGA card..it wont be my last, im seriously looking at upgrading my warranty already!! just to stay with this company. A few Pics of benchmarks if thats ok.
 
 
 
Ive received so much helpful advice on my questions from forum members and also EVGA staff. For that i thank you all.
EVGA you,ve a customer for life..
All the very best
Adger
 

I've researched the coil whine topic before deciding to get a 1070 myself, many users mentioned that a high quality PSU will likely fix coil whine. All of the user feedback (who obtained a better PSU after those suggestions) reported back saying that it fixed their coil whine. I have a Corsair CX750M (probably not a recommended PSU) and the only time I experienced coil whine was at the ending splash screen of Heaven benchmark after finishing a benchmark. I think I remember that you mentioned using a Corsair TX650 and if you are still on that, you could try a premium PSU.

Nice findings ianfinity ..yep still got my tx650 and tbh my coil whine is still very very slight,the only time I heard it more considerably is when my lad sticks Lego hobbit on and it jumped to over 500 FPS haha..I capped the FPS and its fine after. I actually have it at +55 and +550 on the respective cores and I still only hear very slight whine,certainly nothing for me to moan about. Next psu il go for a higher model and see if it eliminates it completely..cheers pal

J0NOX
Wow, my new rma card is now having the same problems that others are having in this thread.
http://forums.evga.com/GTX-1080-FTW-Black-screen-amp-fans-spin-up-to-100-m2530081-p4.aspx
 
Looks like I'll be getting a full refund and talking my business elsewhere.

If you have coilwhine and replacement has coilwhine then probably either other hardware like psu being cause due bad ripple or you set standards to high, if its as loud as exiting heaven benchmark all the time then i would be worried though.

CoercionShaman

arokhantos

J0NOX
Wow, my new rma card is now having the same problems that others are having in this thread.
http://forums.evga.com/GTX-1080-FTW-Black-screen-amp-fans-spin-up-to-100-m2530081-p4.aspx
 
Looks like I'll be getting a full refund and talking my business elsewhere.

If you have coilwhine and replacement has coilwhine then probably either other hardware like psu being cause due bad ripple or you set standards to high, if its as loud as exiting heaven benchmark all the time then i would be worried though.

Look at the other post.  That isn't a problem with coil whine, it is black screens and fan problems.

Yes i know, my new RMA card has black screen and 100% fan prob. I just wanted to update people, happy the coil has reduced but it looks like this card a new problem.