Just upgraded a desktop to Windows 8. the card I have is an AMD Radeon HD 5700. Since the upgrade The display flashes of an on to a black screen. Sometimes during this process there is a message on the display that would indicate that the display went into power save mode. I'm pretty sure this is the driver for the card. I have the latest driver (as of yesterday and that didn't help. Am I missing something or am I on the right track?