Arslan, I had a similar "jet engine noise" coming from the same card.. the fans wouldn't be loud up until I opened a game (wow, dead space 3, etc) then it'll start screaming.. I took the card out opened up the face casing and seen that the fan was filthy with dust.. and inside the fan's casing was a thick, foam-like texture of dust... I cleaned out the case and the fan blades best I could.. I put it back in and when I logged in all my fans were running at seemingly 35-45% but I can play ANY game with no super loud jet noise... I have everything updated to most recent.. but still no matter what i'm doing, even NOTHING, the fans still run at 35-50%. The fans turn off when I put the CPU to sleep and go to work..I come back resume.. and SOMETIMES the fans run at normal speed for a short time..but when I load anything they rev up to about 40-50%. But at least I don't get the jet-noise anymore! I wish I can find more help online but can't find much help; waaaaay to many variables and different problems and seems to not have much info about the Evga Geforce 240 gt... hope I can figure something out.. and good luck to you!