Seems everyone has to watch out for driver conflicts with other hardware on your rigs
 
i had an issue with a logitech mouse - which was locking up the mouse and caused a dropped WU for folding
seems it doesn't like to play nice with the nvidia drivers 
 
I could not play any game more than a few mins before the same issue occurred forcing me to reboot/restart computer
I also noted irregular usage on the card - full use for a few mins then step down to 1350 for a fews sec then step back up to full - in a regular pattern
 
 
change mouse to a microsoft mouse and it works non-stop now
 
also be aware i have 2 different network add-ins(actually 3 in total) in my rig - onboard has failed - USB RJ45 - AIB wireless
both of these were tripping on/off until i change the mouse and reset the cards (damn nuisance to hear beeps every few mins when they fail)
they were in conflict because these were installed before the new vidcard(I didn't have a problem then with the old vidcard)
 
 
 

im still having issue with my network card resetting every time i swap in/out of a game to desktop vice versa
 
and the video downclocks/dips at the same time for a sec or two
 
im assuming they are tied to the same interrupt and the signal from the vidcard is tripping the network card