I've been running the demo with the 163.71 but see where Nvidia has the 163.75 available now, yet Evga has the 169.09 as the most up to date on their site. Since the Nivida driver is WHQL I'm assuming the Evga drv. might be a beta.
Kematian: they aren't, but they know what works well with their OS (it's closed source, ofc only they know) but yes as DeusGear said it's pointless to wait for WHQL, I haven't had issues with beta drivers in a long time, and when I did I just reverted one beta/WHQL build back.
It's so that they have a legitimate excuse when Apple fanbois start whining about "oh my mikrosofts windoze drivars are broken."
Because then Microsoft can say, "hey, we didn't approve those drivers, now shut up and quit yer complaining."
Nirvelli: actually Apple only have to deal with very few combinations of hardware, Microsoft has to deal with a combination of hardware longer than all your limbs and going far out of sight, it is a legitimate reason.