So apparently these are supposed to be a pretty big improvement and add new features like Nvidia FXAA which is supposed to look as good as 4xMSAA and run up to 60% faster. There's also adaptive v-sync which is supposed to help with massive framerate drops when running in v-sync.
I installed them but was having problems, like video not playing correctly on my main monitor so I went back to the most recent official ones. But I dunno, might be different for different cards. I'm just afraid with them being beta drivers that GW2 won't be fully compatible with them yet.
Proximo Admin replied
712 weeks ago