Last month, my mac pro stopped working. I can still hear the chime but nothing loads in the scree. So i brought it to a service center and they told me it's problem with the video card and that I have to pay 500 dollars for that. I am hesitant to shell out that big amount of a cash. Been using the Mac for 3 years now. the video card is nvidia p435(says on the sticker) which i think is a 7300 gt. My question is, can I use PC video cards for this cause I find the similarity. Since it's PCI-e then it should fit and work. My only concern is if they is a special driver that needs to be installed. Need help on this one guys. I am desperate to get this working.