I recently installed a GTX460 graphics card along with a 520W PSU. It worked fine for about an hour, but on a restart the boot-up screens and windows screens are almost unreadable, with flickering lines, random keyboard symbols and colours flashing all over the screen. The Asus "Smart Doctor" gives a message "cannot retrieve graphics card information" or something similar.
I have uninstalled and reinstalled drivers, removed and replaced the card, etc, but still the same. Is the card simply defective???
any help would be appreciated guys!
Having problem with GTX 460 768mb myself, after installing drivers and re-boot the system will not restart and the couple of times I did get it running it was very unstable and would go to a green screen and hang. I'm hoping it's just a driver issue and new software will resolve the problem.