I don't usually write on forums but I spent ages trying to find a driver for this but eventually had to manually add the soundcard using the hardware wizard and thought I'd share with people. I was using some intel drivers I have downloaded - I've written a short tutorial on my blog (http://www.bondysblog.co.uk/geek/windows-7-drivers-for-...) on how I got it working (I was using a Dell Optiplex GX280 with this card onboard and the dell website only supported drivers upto XP)
i want to know about 'SoundMAX Integrated Digital Audio driver for windows 7'
i once contacted sound max about this problem. they arnt responsible for the drivers they leave all drivers up to the oem or to the mobo manufacturer which is a real pain. best suggestion is pcmcia audio if laptop or pci audio for desktop