Mining ltc, this card has been mining without issue/adjustment for a couple of weeks but now is going SICK once per day at the exact same time.

7950 gigabyte windforce
1125/1450/1.25/+20/660khs/72C
Win7

Nothing of note in the logs, as its happening at the same time everyday i thought perhaps another program schedule was interferring but its a designated rig with SFA running on it. anyone seen this before or could hazard a guess?