As you may know, NVIDIA claims that its latest beta driver offers up to 64% single GPU performance and 71% SLI performance increases.
The only way to test that is, of course, to run the same benchmark before and after. And so I did with Thief 4 on my GTX 760 SLI setup:
Before (average of 3 runs, in-game benchmark):
Average frame rate gain seems insignificant, but the minimum frame rate increase is nothing to sneeze at, providing more consistent gameplay experience.
Feel free to share your results.