So, I have two evga 670 gpu. They were fine and all until a month ago, when my display driver kept on crashing at least once a day. Now, it doesn't say that as frequent, but my computer keeps on freezing at least 2-3 times a day. When I watch videos, I've noticed most of voices are out of sync. In addition, my computer feels a bit slow when it is starting up. After I restart my computer a few times, it gets better. I uninstall the driver and download the latest one again. But, it still kept on crashing, so I am currently using the older version of the display driver.