I do get some crashes but I've set up the task scheduler to always reboot my machine when it's a driver error and it restarts all the processes on startup, also restarting your overclock programs which fixes the driver crash resetting the clocks to +0. You can look up your event viewer after a crash and note down the 4 digit error number that corresponds to the driver crash and create a shutdown -r process that's triggered by it.

I've also lowered my overclocks a couple on my 750tis when I noticed that crashes seemed to reset an overclock on some of my cards but not the others... they seemed stable at first but overnight, they would crash two or three times and lowering to a modest overclock seems to lower that number to about one crash per day at most which might not be related to the overclock.