That's not true. I have never heard a coil whine in any gigabyte msi cards. My friend had a problem with his palit but I wasn't using it , since that I remember that there was only problem with that card. I've got nothing elese to say. PNY card is manufactured by palit as I think so get the Asus , EVGA , Msi or Gigabyte. The best safe way to make sure that you are good with warranty. Give 10 gbp more and get EVGA or Asus. I recommend them the most.
One more thing there is no 8 gb version of gtx 1060. Get this card it's on sale with a great cooling and warranty. : https://www.amazon.co.uk/EVGA-GeForce-Superclocked-Express-Graphics/dp/B01IOWT538/ref=sr_1_1?ie=UTF8&qid=1496146406&sr=8-1&keywords=evga+gtx+1060