I have a broken GTX 560m Card in my Toshiba Qosmio x775 Laptop. The card Bricked some time ago, and gives me an error in device manager. Since then If i install the drivers from Nvidia, the device will show up, but upon restarting the computer to finish reinstalling it the computer will crash and crash till you disable it. I want to replace this, as buying a new computer entirely will be to costly, but I don't know if its possible. I would assume if I have a 560m I can just take it in to a store that does repairs and just have them swap it out, but if that's possible is it also possible to upgrade it to a 580m? After some google searching I cant fine anything telling me they are different sizes, and they are the same type from what i read can I just upgrade? I'm really sorry, I don't know much about computer hardware and thought i would ask. Any input would be much appreciated.