Got a few questions about the 347.25 driver from Nvidia

Recently updated the drivers for my GTX 680, and with that the clocks in some games seems to have changed. Anyone else experienced this?

I play Dark Souls 2 a lot and it usually had the core at 1058MHz(stock for my card) and mem speed at 3005MHz according to MSI Afterburner in game display. However after updating it runs core very often at 849MHz or 862MHz. With lower voltage as well. Down from 1.125V to 0.987V for 849MHz and 1.000V for 862MHz. Memory jumps up and down between 824MHz and 3005MHz. It is still running at 60FPS so it's not hurting the performance in the game.

Did nVidia expand the powersaving/turbo boos(or whatever they call it) while playing games with the latest driver?

Try resetting your settings in Afterburner

I can give it a try, but I don't see how it will help as I am already using default/stock settings.