By my reading all the Nvidia 900 series suffers from the problem.  All manufacturers have coil whine to some degree (or don't have it at all).  It's just the luck of the draw I think.  It's like humans... not every human is a whiner but when they are boy do you notice it.

Viper97
By my reading all the Nvidia 900 series suffers from the problem.  All manufacturers have coil whine to some degree (or don't have it at all).  It's just the luck of the draw I think.  It's like humans... not every human is a whiner but when they are boy do you notice it.

Your answer is not accurate.

The quality of the components and the number of phases have a huge affect on how audible the coil whine. It is true that all the "reference" NVIDIA cards from various brands will be equally likely to exhibit certain properties since they are all essentially identical other than a different sticker. But non-reference cards do not behave according to the same general habits.

Coil whine is caused by pulsating current flowing through coils ("inductors" in the voltage regulation circuitry controlling impedance). It is a simple electromagnetic phenomenon. Reducing the strength of the eletromagnetic field by increasing the number of coils (less current flowing through each individual coil) or increasing the quality of the coils makes a huge difference.

sahafiec
why don't you just go on with your GTX 670 for another year Ginwho?
you won't loose anything significant, believe me...
 

He already purchased the MSI 970 4G.

Well as for coil whine, pretty much all manufactures are having issues with it with there gtx 970's. From this poll on another little forum, you can see people are reporting coil whine from all manufactures. 
 
In terms of coolers, I will say that evga is not known to have the best aftermarket air coolers. It does its job but if your looking for silent operation then there are better options from other manufactures such as msi. 
 
As for the power phase deal, that has been hugely controversial. While having more phases does allow more power to be delivered to the gpu unit, this is something that doesn't always have a real world impact. Overbuilt power circuity usually only comes into play when you are going for very high overclocks. From the reviews that I have seen, if your simply going to run this card on air then silicon lottery will play more of a factor on your overclock then having extra power phases. Having more power available only means higher overclocks when the gpu itself can actually reach such a clock speed that it needs the extra power. 
 
In the end this is my opinion, the real world difference between evga and the others is pretty much non-existent other then evga cards are a little louder if you are running on air. If you are into heavy overclocking the card with sub-ambient temps, then the extra power phases stand a better chance to help out more, but as always still playing silicon lottery. 
 

ty_ger07
Coil whine is caused by pulsating current flowing through coils ("inductors" in the voltage regulation circuitry controlling impedance). It is a simple electromagnetic phenomenon. Reducing the strength of the eletromagnetic field by increasing the number of coils (less current flowing through each individual coil) or increasing the quality of the coils makes a huge difference.

 
I agree with 90% of this. Simply having a lower current though the coil doesn't always mean less coil whine. What really makes the whine audible is that they are pulsing at a frequency that it inside the human hearing range. It has more to do with the frequency of the pulse, if that ends up in human hearing range, drawing more current will make louder because it will form a stronger magnetic field. You can draw tons of current though a coil but if its frequency its "whinging" at is outside your hearing range, well your not going to hear it.