I am a newbie to Mac and Forum. I am so used to PC that I can change my hardware anytime. Anyway, My question is my iMac 27 video card is AMD HD6970M 2048MB. When people said upgrade iMac is Nvidia GeForce 680MX 2048MB. Does that mean, we can pay money to apple care to upgrade the video card of my i7? My bootcamp not sure what happen but the video card always cannot be detected and get into a blue screen and now the entire windows 7 IE and microsoft office is not working...need to re-install I guess. But I think it is the fault of the video card. I have problems with the DVD drive as well, it can't read many CD or DVD. Any recommendation of good DVD replacement and where to get done? So frustrated with iMac in PC mode even when in OS X, I have problems in printing in the past 6months, till Xerox and HP come with a new driver for mountain lion..drive me crazy!!! Other than that, I love pages, keynotes, and my photo/video editing can be done much faster. Love to hear any advise from you expert... I am at a the point that I want to sell my iMac and goes back to PC.