Graphics card issue?

[Mokoto]

It's a Nvidia card. Your problem lies in your drivers. I would suggest you go to http://www.geforce.com/drivers and download their latest drivers. Uninstall via their program, then reinstall. Check to see if the problem still happens afterwards. Since you've been seeing this for a few weeks, it's just come to a head in either the system or the card. You may also want to remove your cover on your case and use a can of compressed air to clean the card's heat sink off if you have not done this in at least the last yr. I recommend you clean your case at least once a yr. A simple YouTube search will show you how to do it properly. Try these easy steps before you consider replacing the card.

If you're a bit more advance I suggest deleting the driver via the Device Manager before you re-install. To do this go to the Device Manager, expand the "Display Adapters", Right click on the "Nvida GeForce GTX 560Ti", select "Uninstall". A prompt will confirm, and have a option to "Delete the driver software for this device", check that box then hit "OK" Close the windows once it's done. Restart the computer with your Lan/wifi disconnected so that windows does not automatically download software from it's servers. Then open the file you got from Nvidia and install the drivers. If this does not solve your problem then you maybe having a hardware failure with the card and it is time to replace it.