I am having the same issue, though I tend to only freeze up/have a black screen for 5-10 seconds at most.
From checking around the internet this seems to be a problem affecting Nvidida cards and is believed to be the driver crashing and recovering.
Has anyone had this happen on an AMD card?
For reference I have a Gigabyte GTX 780 GHZ edition in a rig that is less than 1 month old. (4770K based, mild OC to 4.0GHz)
The max temp my card hits (using OHM to see peak temps) is right at 50c. So overheating is not an issue.
I can play Dayz, a game that pushes the temps pretty high, for over 5 hours with no problem. I've also ran Valley in a loop for just over 2 hours and used OCCT to error check my card. CPU and mem are both fine as well as I've ran a full memtest (4 passes) and ran Prime95 over night to test the CPU stability.
Even ran Prime and Valley together for an hour to check temps with both under load with zero issues.
PSU is new (80+ gold and well over wattage and 12v rail requirements for system/GPU) and my mobo's BIOS is flashed up to the current version.
Drivers are current with the previous drivers having been scrubbed in safe mode before installing the latest. I also tested the beta (then scrubbed and re-installed the current) but I seemed to get freezes/driver crashes more. (3 in less than 15 mins vs. 1 maybe every hour or so in non-beta)
I play on Maximum, but have gotten the freeze/blackscreen even with lowered settings.
This is the only game I have any sort of issue with.