My 970 is a Gigabyte G1 Gaming edition. No problems at all with it, but then the first and ONLY video card I've had (non-screen) problems with is my Gigabyte G1 Gaming 1070 card.
It's a mighty expensive exercise buying video cards and monitors and having to sell them second hand. Here in New Zealand store return policies don't really support "'cause it gives me headaches" although I was lucky in the case of my former Acer XB271 IPS monitor (flicker free, low blue etc but still gave me headaches) that I managed to return for near full purchase price.
I'm still stuck not knowing if ALL Nvidia 1070/1080 cards are unusable by me.