As you've updated to 8.1 you should be looking at the latest driver for your operating system, and keep updating... Unless you run into serious issues. Really you should be looking at forums specifically to do with your graphics card though to answer this question in more depth rather than DAW specific.
I am always updating drivers and BIOSs myself and my system is always fast and stable. And if one day I update and I don't like the result, I can roll back. That is what backups are for.
ps
I'm on the latest nvidea drivers for my card and they are fine. I know people have different experiences.