Drivers can't run for Gigabyte GTX 470 SOC?

Some of the black screen errors are being caused by either incompatible Power Plan setting or wrong driver installation. In your case, errors should be caused by your graphic driver. So you should try to remove every trace of the current driver. After a reboot enter Windows in Safe Mode, and then reinstall graphic driver. You should also remember that when updating graphic card driver, update DirectX as well. This error also can be caused by overclocking, so stop overclocking.