I personally installed the OpenAL beta drivers yesterday (2.8.002) , I downloaded them from creative site and there were no others more actual ones. Where did you see this ? Or wait, do you mean just "normal" sound drivers, cause the one I´m using now are OpenAL ones.
Okay, I´m absolutely fine with the betas, really happy, because now I can use the Audigy finally again on my D900K in high performance mode without popping. Just enjoying the sound and being happy !!! There is just one restriction: I can´t use EAX features, otherwise the popping starts. Also CMSS 3D is just the first option selectable, with the others popping also starts. This indicates again very clearly that it is a bandwidth problem and so a hardware caused thing. On the other hand I´m surprised why this beta driver has such an effect - seems to lower the bandwidth demand. And: The sound got BETTER. It´s crystal clear now, absolutely amazing. THIS is what I call good a´sound quality and should be standard onboard.... Thousand times better than Realtek crap.
ebus: Using Quadro here btw you speak german ?