Originally Posted by mheat6
I thought it was my PSU too. I first had a corsair gs700 running the 7970, i thought the psu was causing it so i went out to bestbuy, returned the corsair gs700 and got the best one they had there, a thermaltake 850w tr2 rx but i still get the coil whine. And within a week of owning the 7970 it seems like the card just got worse and it even buzzes while idling now. I know for sure that its the card with the coil wine, because when i put my gtx 260 in, there is no noises at all.
before returning it, why didn't you just take the power supply out of the case while still connected and use your ear to listen to verify that it was in fact the psu making the noise.
also, even if your psu was making the noise with the 7970, it may very well have been silent with a gtx 260 because of the difference in vrm and power consumption.