I've just got myself a gtx 295 card (Gainward). Everything works perfect. Stable temperature, around 50 idle, up to 70 in gaming until now atleast. But when I'm starting WoW (no account tho, stopped playing) I get this strange noise from the grapich card itself. I don't think its the fan, or I'm not completely sure. The noise comes from the inside of the card. It is pretty hard to explain. If i tab WoW down to windows, the noise stops, and starts again after i tab wow up again. This did not happen in fallout 3, but it did happen in Guild wars aswell.
I've updated the card to the newest version, and the preformance is what it should be. I get around 70-80 fps at Fallout 3 with all on max. And around 300 in WoW. I havent tested something else yet. The light from the grapich card lights green. I haven't overclocked any components.
I'm pretty clueless of whats wrong, if not its the PSU which doesn't supply the grapich card with enough power, I'm not sure.
Yes coil noise is normal. Different cards make more or less noise. It is the electricity flowing through the capacitors.
But capacitors arn't meant to make noise when the electricity goed through them, if there making a high pitched whinning noise then it generally means that there is electricity arcing somewhere inside, which shouldn't be happening.