The lastest NVidia driver has been the best for my 2 780 GTX's. It has brought fluidity, stability and the "random frame drop for no apparent reason" that would occur about every 10 minutes has almost completely disappeared. Playing at 1920X1080, everything on Ultra, Lightboost enabled and my frames capped at 100. I might even be able to try 120 Hz now (monitors default) as before it would vary too much and wouldn't be a decent solid 120, hence why I put it down to 100. Hopefully the upcoming patch helps too.