I'm having the same problem. I've uninstalled everything nvidia, removed the drivers, tried installing the oldest driver I could fine (Jan 09), still the same.
Put an old pci-e and it works ok. Was thinking it was driver related since this has happened when I updated the video drivers, but rollback didn't help there either.
It does look like jayellis25
's card has indeed died but that is no reason to hijack his thread, so please start your own.